High-temperature and short-time(HTST)solution heat treatment combined with non-isothermal aging(NIA)was employed to regulate the microstructure and properties of Al−4.5Mg−2.0Zn−0.3Ag alloy.Results indicate that HTST s...High-temperature and short-time(HTST)solution heat treatment combined with non-isothermal aging(NIA)was employed to regulate the microstructure and properties of Al−4.5Mg−2.0Zn−0.3Ag alloy.Results indicate that HTST solution heat treatment can not only retain partial deformation dislocations,but inhibit the recrystallization behavior and increase the proportion of low-angle grain boundaries(LAGBs).In the subsequent NIA process,HTST solution heat treatment combined with NIA is instrumental in restraining the degradation of dislocations and promoting precipitation of nano-scale T'-Mg_(32)(Al,Zn,Ag)49 phase,which improves the strength of the alloy greatly.In addition,a higher fraction of LAGBs and the discontinuous distribution of grain boundary precipitates caused by this novel technology meliorate the corrosion resistance of Al−4.5Mg−2.0Zn−0.3Ag alloy.展开更多
High strength and low corrosion resistance are always the contradiction in Al-Si-Cu-Mg cast alloy due to introducing high Cu and Mg levels.In this work,the new strategy was achieved for enhancing corrosion resistance ...High strength and low corrosion resistance are always the contradiction in Al-Si-Cu-Mg cast alloy due to introducing high Cu and Mg levels.In this work,the new strategy was achieved for enhancing corrosion resistance and mechanical properties by regulating multi-scale microstructure characteristics in Al-9Si-4.2Cu-0.25Mg-Zr alloy.Electrochemical and corrosion morphology results indicate that the addition of Zr significantly enhances the corrosion resistance of the alloy.The grain refinement inhibits the charge transfer process between cathode phases and the matrix is the main reason at the Zr level of less than 0.15%.When the Zr level is up to 0.3%,the multi-scale synergistic effect of grain refinement and passive film enhancement significantly inhibits the corrosion process.Moreover,0.3%Zr addition increases the yield strength to 419 MPa,tensile strength to 490 MPa,and the acceptable fracture elongation to 3.8%.The strengthening of mechanical and corrosion properties originates from the nano-Al3Zr precipitates after T6 treatment.This study provides a novel micro-mechanism and design strategy for simultaneously improving corrosion resistance and enhancing the mechanical properties of Al-Si-Cu-Mg cast alloy.展开更多
The present study aims to clarify the influence of Mo addition onα-dispersoids precipitation,associ-ated recrystallization resistance and mechanical performance of Mn-containing Al-Mg-Si-Cu alloys.Re-sults reveal tha...The present study aims to clarify the influence of Mo addition onα-dispersoids precipitation,associ-ated recrystallization resistance and mechanical performance of Mn-containing Al-Mg-Si-Cu alloys.Re-sults reveal that joint addition of Mn and Mo as dispersoid-forming elements dramatically enhancesα-dispersoids precipitation,achieving a fivefold increment in number density and a 26.5%reduction in size compared to the alloy containing only Mn addition.Additionally,the width of dispersoid-free zones is reduced from appropriately 5μm to<1μm.A portion of theα-Al(Mn,Mo,Fe)Si dispersoids exhibits the quasicrystal characteristics,forming coherent interfaces with the aluminum matrix.In compassion,α-Al(Mn,Fe)Si dispersoids transformed entirely into a simple cubic structure,being partially coherent with the matrix.The improvements inα-dispersoids precipitation contribute to higher pinning force on moving boundaries,resulting in superior resistance to recrystallization of the alloy.Consequently,an ideal fibrous microstructure is retained in alloy co-alloyed with Mn and Mo after solution treatment.Whereas,alloys containing only Mn or Mo show complete recrystallization.A superior balance between strength and ductility is achieved for 0.7Mn0.3Mo alloy,attributed to the increased work hardening capacity and suppression of dynamic recovery.展开更多
Small dispersoid particles inhibit recrystallization which is critical in controlling the grain structure of many high strength low alloy steels. A general kinetic model has been developed to predict precipitation of ...Small dispersoid particles inhibit recrystallization which is critical in controlling the grain structure of many high strength low alloy steels. A general kinetic model has been developed to predict precipitation of V（C, N） in vanadium microalloyed steels with a series of carbon and nitrogen contents. The solubility product and driving force of carbonitrides precipitated in austenite as well as the interracial energy and other parameters can be evaluated to predict Nucleation rates-Temperature （NrT） and Precipitation-Time-Temperature （PTT） diagram. By using stress relaxation tests and fitting with Avrami equation, it is possible to draw PTT diagrams. The predictions of the model coincide with results of experimental investigation on V（C, N） precipitation in austenite. The nose temperature is around 850 ℃ obtained by experiment which is different from the prediction of the model and the difference is 30 ℃, and nitrogen has more effect on the shape of ＂C＂ curve of PTT diagram than carbon that makes ＂C＂ curve move leftward significantly.展开更多
The microstructural evolution of AA6061 and Mn-bearing Al-Mg-Si-Cu alloys was studied by compression tests that were carried out between 300 and 500 °C with a wide range of strain rates. Compared to the AA6061 al...The microstructural evolution of AA6061 and Mn-bearing Al-Mg-Si-Cu alloys was studied by compression tests that were carried out between 300 and 500 °C with a wide range of strain rates. Compared to the AA6061 alloy, the large amount of α-Al(MnFeCr)Si dispersoids in the Mn-bearing alloy yielded a significant increase in the flow stress under all deformation conditions. The effects of the deformation parameters on the evolution of the microstructure were studied using electronic backscatter diffraction measurements. The predominant softening mechanism of both alloys was dynamic recovery. The presence of α dispersoids in Mn-bearing alloys effectively refined the size of substructures with misorientation angles in the range of 2°-5°, which retarded the dynamic recovery. To predict the subgrain size under various deformation conditions, the threshold stresses that were caused by α dispersoids were calculated by the modified Orowan equation and incorporated into a conventional constitutive equation. The subgrain size that was predicted by the modified constitutive equation showed satisfactory agreement with the experimental measurements.展开更多
Inverse method was used in single crystal superalloy DD6 processing simulation during solidification. Numerical modeling coupled with experiments has been used to estimate the interface heat transfer coefficient （IHT...Inverse method was used in single crystal superalloy DD6 processing simulation during solidification. Numerical modeling coupled with experiments has been used to estimate the interface heat transfer coefficient （IHTC） between the surface of slab casting and inner mold. Calculated temperature dependent values of IHTC were obtained from a numerical solution. The calculated temperatures agreed well with the measurement of cooling profile.展开更多
A three-dimensional numerical model coupling the macrosegregation and magnetohydrodynamic simulations was developed to investigate the effects of electromagnetic stirring(EMS)on the macrosegregation.The results show t...A three-dimensional numerical model coupling the macrosegregation and magnetohydrodynamic simulations was developed to investigate the effects of electromagnetic stirring(EMS)on the macrosegregation.The results show that a significant swirling flow was induced by the in-mold EMS,which further changed the shape of the solidification shell and homogenized the solute elements in mold.However,the effects were only confined to the initial billet shell.The improvement in centerline segregation was observed with the usage of the final EMS(F-EMS),which led to the forced convection at the final solidification stage.The solute elements in the mushy zone were significantly even,with the maximum segregation degree of solute C reducing from 1.311 to 1.237.In addition,the effects of the stirrer positions and currents of F-EMS on the macrosegregation alleviation were numerically studied.Different values of centerline segregation were predicted with various stirrer positions and currents,and there is an optimum stirrer parameter to obtain the best macrosegregation alleviation.In the experimental conditions,the optimum position was about 7 m away from meniscus,and the optimum current was 300 A.展开更多
20 mm thick plates of 2519-T87 high strength aluminum alloy have been welded.The effects of the compositions of filler wires,the heat input and the compositions of shielding gas on the mechanical properties and micros...20 mm thick plates of 2519-T87 high strength aluminum alloy have been welded.The effects of the compositions of filler wires,the heat input and the compositions of shielding gas on the mechanical properties and microstructure of the welded joint have been investigated.The results indicate that finer microstructure,better mechanical properties and higher value of hardness of HAZ can be obtained by using lower heat input.The use of Ar/He mixed shielding gas has several advantages over pure Ar shielding gas.With the increase of the proportion of He in the mixed shielding gas,the grain size of the weld metal as well as porosity susceptibility decreases.When the volume ratio of He to Ar reaches 7:3,the porosity and the grain size of weld metal reach the minimum,and the porosity can be further reduced by filling some CO_(2).展开更多
The spatial arrangement,distribution and morphology of Fe-bearing intermetallics in AA6082 alloys depends on the manufacturing process of the alloy and thus influences the macroscopic properties.Here,the microstructur...The spatial arrangement,distribution and morphology of Fe-bearing intermetallics in AA6082 alloys depends on the manufacturing process of the alloy and thus influences the macroscopic properties.Here,the microstructure of a near industrial scale casting AA6082 Al alloy fabricated by:(a)direct chill casting,(b)Al-5 Ti-1 B grain refiner addition and(c)intensive melt shearing has been investigated by threedimensional visualization using SEM-based serial ultra microtomy tomography.The formation sequence of phases in AA6082 alloys is generally categorized into four stages:formation ofα-Al grains,Fe-bearing intermetallics,Mg_(2)Si phase,and eutectic rosettes.Results of three-dimensional visualization of the microstructure indicated that TiBparticles not only could nucleate Fe-bearingβ-intermetallics,but also could provide substrate for the formation of Fe-bearingα-intermetallics and Mg_(2)Si.A further deep analysis reveals that the essential condition for the formation of secondary phases such as Fe-bearing intermetallics and Mg_(2)Si phase is the build-up of a supersaturated solute front at theα-Al solid-liquid interface irrespective of the specific nucleation site.In addition,the results indicate that grain refinement processing causes the severe interconnectivity of Fe-bearingα-intermetallics.However,the intensive melt shearing is a better manufacturing process because the intermetallics are more evenly distributed and refined than with the addition of the grain refiner,thereby improving the properties of the alloy.展开更多
The efficient degradation of antibiotics in wastewater is critical for addressing global water pollution challenges.Herein,we report an Fe-Co dual-atom catalyst anchored on a nitrogen-doped carbon matrix(FeCo/NC),whic...The efficient degradation of antibiotics in wastewater is critical for addressing global water pollution challenges.Herein,we report an Fe-Co dual-atom catalyst anchored on a nitrogen-doped carbon matrix(FeCo/NC),which demonstrates superior performance in peroxymonosulfate(PMS)activation and tetracycline(TC)degradation.This system achieves a remarkable TC removal efficiency of 91.2%,significantly outperforming single-atom catalysts.Mechanistic investigations reveal that FeCo/NC induces a unique spin-state reconstruction,optimizing its electronic structure and shifting the oxidative mechanism from a radical-driven pathway to a singlet oxygen(^(1)O_(2))-dominated nonradical process.Theoretical insights from density functional theory(DFT)calculations confirm the preferred ^(1)O_(2) generation pathway at FeCo active sites,with reduced energy barriers that enhance catalytic activity.Toxicological evaluations validate that TC degradation intermediates exhibit minimal ecological risks,reinforcing the environmental safety of this approach.The long-term stability of the FeCo/NC/PMS system was evaluated via a continuous-flow photocatalytic reactor.The above results reflect the superior catalytic activity and stability of the FeCo/NC/PMS system.This work establishes a paradigm for designing advanced dual-atom catalysts and provides critical insights for developing eco-friendly solutions to antibiotic-contaminated wastewater treatment.展开更多
The detrimental Fe element in Al-Si cast alloy can be effectively removed by Fecontaining intermetallics separation.However,the formation temperature of Fecontaining intermetallics can be further improved to increase ...The detrimental Fe element in Al-Si cast alloy can be effectively removed by Fecontaining intermetallics separation.However,the formation temperature of Fecontaining intermetallics can be further improved to increase the removal efficiency of Fe element.The effects of the Cr/Mn atomic ratio on the stability,theoretical melting point,elastic modulus,and thermal properties were calculated with the aim of improving the stability of theα-Al(FeMnCr)Si phase.An increased Cr/Mn atomic ratio effectively increased the stability,theoretical melting point,elastic modulus,isobaric heat capacity,and reduced the volumetric thermal expansion coefficient ofα-Al(FeMnCr)Si phase,which can be explained by the strengthened Al-Cr and Si-Cr chemical bonds.The experimental study results revealed that the formation temperature and Young's modulus of theα-Al(FeMnCr)Si phase increase from 673.0°C and 228.5 GPa to 732.0°C and 272.1 GPa with the Cr/Mn atomic ratio increasing from 0.11 to 0.8,which better validates the thermodynamic stability,theoretical melting point and elastic modulus calculation results.These results provide a new strategy for designing Fecontaining intermetallics with the desired properties,which contributes to guiding the development of high-performance recycled Al-Si alloys.展开更多
基金National Natural Science Foundation of China(Nos.52204400,52204401)Natural Science Foundation of Hebei Province,China(No.E2022203033)。
文摘High-temperature and short-time(HTST)solution heat treatment combined with non-isothermal aging(NIA)was employed to regulate the microstructure and properties of Al−4.5Mg−2.0Zn−0.3Ag alloy.Results indicate that HTST solution heat treatment can not only retain partial deformation dislocations,but inhibit the recrystallization behavior and increase the proportion of low-angle grain boundaries(LAGBs).In the subsequent NIA process,HTST solution heat treatment combined with NIA is instrumental in restraining the degradation of dislocations and promoting precipitation of nano-scale T'-Mg_(32)(Al,Zn,Ag)49 phase,which improves the strength of the alloy greatly.In addition,a higher fraction of LAGBs and the discontinuous distribution of grain boundary precipitates caused by this novel technology meliorate the corrosion resistance of Al−4.5Mg−2.0Zn−0.3Ag alloy.
基金National Natural Science Foundation of China(Grants No.52004168)Research Fund for International Senior Scientists(Grants No.52150710544)+2 种基金National Natural Science Foundation of China(Grants Nos.52171043 and 51771066)Open Fund for State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body(Grants No.32115007)Aluminum-based Transportation Lightweighting Technology Demonstration Project(Grants No.2021SFGC1001).
文摘High strength and low corrosion resistance are always the contradiction in Al-Si-Cu-Mg cast alloy due to introducing high Cu and Mg levels.In this work,the new strategy was achieved for enhancing corrosion resistance and mechanical properties by regulating multi-scale microstructure characteristics in Al-9Si-4.2Cu-0.25Mg-Zr alloy.Electrochemical and corrosion morphology results indicate that the addition of Zr significantly enhances the corrosion resistance of the alloy.The grain refinement inhibits the charge transfer process between cathode phases and the matrix is the main reason at the Zr level of less than 0.15%.When the Zr level is up to 0.3%,the multi-scale synergistic effect of grain refinement and passive film enhancement significantly inhibits the corrosion process.Moreover,0.3%Zr addition increases the yield strength to 419 MPa,tensile strength to 490 MPa,and the acceptable fracture elongation to 3.8%.The strengthening of mechanical and corrosion properties originates from the nano-Al3Zr precipitates after T6 treatment.This study provides a novel micro-mechanism and design strategy for simultaneously improving corrosion resistance and enhancing the mechanical properties of Al-Si-Cu-Mg cast alloy.
基金financially supported by the National Natu-ral Science Foundation of China(No.52204395)the Key Tech-nology Research and Development Program of Shandong Province(No.2021SFGC1001)the Science and Technology Program of Suzhou(Nos.SYG202313 and SYG202324).
文摘The present study aims to clarify the influence of Mo addition onα-dispersoids precipitation,associ-ated recrystallization resistance and mechanical performance of Mn-containing Al-Mg-Si-Cu alloys.Re-sults reveal that joint addition of Mn and Mo as dispersoid-forming elements dramatically enhancesα-dispersoids precipitation,achieving a fivefold increment in number density and a 26.5%reduction in size compared to the alloy containing only Mn addition.Additionally,the width of dispersoid-free zones is reduced from appropriately 5μm to<1μm.A portion of theα-Al(Mn,Mo,Fe)Si dispersoids exhibits the quasicrystal characteristics,forming coherent interfaces with the aluminum matrix.In compassion,α-Al(Mn,Fe)Si dispersoids transformed entirely into a simple cubic structure,being partially coherent with the matrix.The improvements inα-dispersoids precipitation contribute to higher pinning force on moving boundaries,resulting in superior resistance to recrystallization of the alloy.Consequently,an ideal fibrous microstructure is retained in alloy co-alloyed with Mn and Mo after solution treatment.Whereas,alloys containing only Mn or Mo show complete recrystallization.A superior balance between strength and ductility is achieved for 0.7Mn0.3Mo alloy,attributed to the increased work hardening capacity and suppression of dynamic recovery.
文摘Small dispersoid particles inhibit recrystallization which is critical in controlling the grain structure of many high strength low alloy steels. A general kinetic model has been developed to predict precipitation of V（C, N） in vanadium microalloyed steels with a series of carbon and nitrogen contents. The solubility product and driving force of carbonitrides precipitated in austenite as well as the interracial energy and other parameters can be evaluated to predict Nucleation rates-Temperature （NrT） and Precipitation-Time-Temperature （PTT） diagram. By using stress relaxation tests and fitting with Avrami equation, it is possible to draw PTT diagrams. The predictions of the model coincide with results of experimental investigation on V（C, N） precipitation in austenite. The nose temperature is around 850 ℃ obtained by experiment which is different from the prediction of the model and the difference is 30 ℃, and nitrogen has more effect on the shape of ＂C＂ curve of PTT diagram than carbon that makes ＂C＂ curve move leftward significantly.
基金the financial supports from the National Natural Science Foundation of China (No. U1864209)Jincheng Science and Technology Plan Project of Shanxi Province, China (No. 201702014)。
文摘The microstructural evolution of AA6061 and Mn-bearing Al-Mg-Si-Cu alloys was studied by compression tests that were carried out between 300 and 500 °C with a wide range of strain rates. Compared to the AA6061 alloy, the large amount of α-Al(MnFeCr)Si dispersoids in the Mn-bearing alloy yielded a significant increase in the flow stress under all deformation conditions. The effects of the deformation parameters on the evolution of the microstructure were studied using electronic backscatter diffraction measurements. The predominant softening mechanism of both alloys was dynamic recovery. The presence of α dispersoids in Mn-bearing alloys effectively refined the size of substructures with misorientation angles in the range of 2°-5°, which retarded the dynamic recovery. To predict the subgrain size under various deformation conditions, the threshold stresses that were caused by α dispersoids were calculated by the modified Orowan equation and incorporated into a conventional constitutive equation. The subgrain size that was predicted by the modified constitutive equation showed satisfactory agreement with the experimental measurements.
基金supported by National Basic Research Program of China(No.2005CB724105)National Natural Science Foundation of China (No.10477010)National High Technical Research and Development Program of China(No.2007AA04Z141)
文摘Inverse method was used in single crystal superalloy DD6 processing simulation during solidification. Numerical modeling coupled with experiments has been used to estimate the interface heat transfer coefficient （IHTC） between the surface of slab casting and inner mold. Calculated temperature dependent values of IHTC were obtained from a numerical solution. The calculated temperatures agreed well with the measurement of cooling profile.
基金the China Postdoctoral Science Foundation(No.2018M642308)Jiangsu Planned Projects for Postdoctoral Research Funds(No.2018K068C).
文摘A three-dimensional numerical model coupling the macrosegregation and magnetohydrodynamic simulations was developed to investigate the effects of electromagnetic stirring(EMS)on the macrosegregation.The results show that a significant swirling flow was induced by the in-mold EMS,which further changed the shape of the solidification shell and homogenized the solute elements in mold.However,the effects were only confined to the initial billet shell.The improvement in centerline segregation was observed with the usage of the final EMS(F-EMS),which led to the forced convection at the final solidification stage.The solute elements in the mushy zone were significantly even,with the maximum segregation degree of solute C reducing from 1.311 to 1.237.In addition,the effects of the stirrer positions and currents of F-EMS on the macrosegregation alleviation were numerically studied.Different values of centerline segregation were predicted with various stirrer positions and currents,and there is an optimum stirrer parameter to obtain the best macrosegregation alleviation.In the experimental conditions,the optimum position was about 7 m away from meniscus,and the optimum current was 300 A.
基金This project is supported by National Hi-tech Research and Development Program of China(863 Program,No.2002AA305402).
文摘20 mm thick plates of 2519-T87 high strength aluminum alloy have been welded.The effects of the compositions of filler wires,the heat input and the compositions of shielding gas on the mechanical properties and microstructure of the welded joint have been investigated.The results indicate that finer microstructure,better mechanical properties and higher value of hardness of HAZ can be obtained by using lower heat input.The use of Ar/He mixed shielding gas has several advantages over pure Ar shielding gas.With the increase of the proportion of He in the mixed shielding gas,the grain size of the weld metal as well as porosity susceptibility decreases.When the volume ratio of He to Ar reaches 7:3,the porosity and the grain size of weld metal reach the minimum,and the porosity can be further reduced by filling some CO_(2).
基金financially supported by the EPSRC(No.EP/N007638/1)the 2021 Jiangsu Shuangchuang(Mass Innovation and Entrepreneurship)Talent Program(No.JSSCBS20210702)。
文摘The spatial arrangement,distribution and morphology of Fe-bearing intermetallics in AA6082 alloys depends on the manufacturing process of the alloy and thus influences the macroscopic properties.Here,the microstructure of a near industrial scale casting AA6082 Al alloy fabricated by:(a)direct chill casting,(b)Al-5 Ti-1 B grain refiner addition and(c)intensive melt shearing has been investigated by threedimensional visualization using SEM-based serial ultra microtomy tomography.The formation sequence of phases in AA6082 alloys is generally categorized into four stages:formation ofα-Al grains,Fe-bearing intermetallics,Mg_(2)Si phase,and eutectic rosettes.Results of three-dimensional visualization of the microstructure indicated that TiBparticles not only could nucleate Fe-bearingβ-intermetallics,but also could provide substrate for the formation of Fe-bearingα-intermetallics and Mg_(2)Si.A further deep analysis reveals that the essential condition for the formation of secondary phases such as Fe-bearing intermetallics and Mg_(2)Si phase is the build-up of a supersaturated solute front at theα-Al solid-liquid interface irrespective of the specific nucleation site.In addition,the results indicate that grain refinement processing causes the severe interconnectivity of Fe-bearingα-intermetallics.However,the intensive melt shearing is a better manufacturing process because the intermetallics are more evenly distributed and refined than with the addition of the grain refiner,thereby improving the properties of the alloy.
基金supported by the Yunnan Province Education Department Scientific Research Fund Project(No.2024J0828)the Basic Research Project of Yunnan Province Science and Technology Department(No.202201AU070004)the National Natural Science Foundation of China(Nos.52272287 and 22268003).
文摘The efficient degradation of antibiotics in wastewater is critical for addressing global water pollution challenges.Herein,we report an Fe-Co dual-atom catalyst anchored on a nitrogen-doped carbon matrix(FeCo/NC),which demonstrates superior performance in peroxymonosulfate(PMS)activation and tetracycline(TC)degradation.This system achieves a remarkable TC removal efficiency of 91.2%,significantly outperforming single-atom catalysts.Mechanistic investigations reveal that FeCo/NC induces a unique spin-state reconstruction,optimizing its electronic structure and shifting the oxidative mechanism from a radical-driven pathway to a singlet oxygen(^(1)O_(2))-dominated nonradical process.Theoretical insights from density functional theory(DFT)calculations confirm the preferred ^(1)O_(2) generation pathway at FeCo active sites,with reduced energy barriers that enhance catalytic activity.Toxicological evaluations validate that TC degradation intermediates exhibit minimal ecological risks,reinforcing the environmental safety of this approach.The long-term stability of the FeCo/NC/PMS system was evaluated via a continuous-flow photocatalytic reactor.The above results reflect the superior catalytic activity and stability of the FeCo/NC/PMS system.This work establishes a paradigm for designing advanced dual-atom catalysts and provides critical insights for developing eco-friendly solutions to antibiotic-contaminated wastewater treatment.
基金supported by the National Natural Science Foundation of China(Grants no.52304369)the Open Research Fund from the State Key Laboratory of Rolling and Automation,Northeastern University(Grant no.2022RALKFKT008)+1 种基金the Open Fund for the State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body(Grants no.32115007)Aluminum-based Transportation Lightweighting Technology Demonstration Project(Grants no.2021SFGC1001).
文摘The detrimental Fe element in Al-Si cast alloy can be effectively removed by Fecontaining intermetallics separation.However,the formation temperature of Fecontaining intermetallics can be further improved to increase the removal efficiency of Fe element.The effects of the Cr/Mn atomic ratio on the stability,theoretical melting point,elastic modulus,and thermal properties were calculated with the aim of improving the stability of theα-Al(FeMnCr)Si phase.An increased Cr/Mn atomic ratio effectively increased the stability,theoretical melting point,elastic modulus,isobaric heat capacity,and reduced the volumetric thermal expansion coefficient ofα-Al(FeMnCr)Si phase,which can be explained by the strengthened Al-Cr and Si-Cr chemical bonds.The experimental study results revealed that the formation temperature and Young's modulus of theα-Al(FeMnCr)Si phase increase from 673.0°C and 228.5 GPa to 732.0°C and 272.1 GPa with the Cr/Mn atomic ratio increasing from 0.11 to 0.8,which better validates the thermodynamic stability,theoretical melting point and elastic modulus calculation results.These results provide a new strategy for designing Fecontaining intermetallics with the desired properties,which contributes to guiding the development of high-performance recycled Al-Si alloys.
