A near eutectic Al−12.6Si alloy was developed with 0.0wt%,2.0wt%,4.0wt%,and 6.0wt%Al−5Ti−1B master alloy.The micro-structural morphology,hardness,tensile strength,elongation,and fracture behaviour of the alloys were s...A near eutectic Al−12.6Si alloy was developed with 0.0wt%,2.0wt%,4.0wt%,and 6.0wt%Al−5Ti−1B master alloy.The micro-structural morphology,hardness,tensile strength,elongation,and fracture behaviour of the alloys were studied.The unmodified Al−12.6Si al-loy has an irregular needle and plate-like eutectic silicon(ESi)and coarse polygonal primary silicon(PSi)particles in the matrix-likeα-Al phase.The P_(Si),E_(Si),andα-Al morphology and volume fraction were changed due to the addition of the Al−5Ti−1B master alloy.The hardness,UTS,and elongation improved due to the microstructural modification.Nano-sized in-situ Al3Ti particles and ex-situ TiB_(2)particles caused the mi-crostructural modification.The fracture images of the developed alloys exhibit a ductile and brittle mode of fracture at the same time.The Al−5Ti−1B modified alloys have a more ductile mode of fracture and more dimples compared to the unmodified alloy.展开更多
Finite element analysis has been carried out to understand the effect of various processing routes and condition on the microscale deformation behavior of Al–4.5 Cu–2 Mg alloy.The alloy has been developed through fo...Finite element analysis has been carried out to understand the effect of various processing routes and condition on the microscale deformation behavior of Al–4.5 Cu–2 Mg alloy.The alloy has been developed through four different routes and condition,i.e.conventional gravity casting with and without refiner,rheocasting and SIMA process.The optical microstructures of the alloy have been used to develop representative volume elements(RVEs).Two different boundary conditions have been employed to simulate the deformation behavior of the alloy under uniaxial loading.Finally,the simulated stress-strain behavior of the alloy is compared with the experimental result.It is found that the microstructural morphology has a significant impact on stress and strain distribution and load carrying capacity.The eutectic phase always carries a higher load than theα(Al)phase.The globularα(Al)grains with thinner and uniformly distributed eutectic network provide a better stress and strain distribution.Owing to this,SIMA processed alloy has better stress and strain distribution than other processes.Finally,the simulated yield strength of the alloy is verified by experiment and they have great agreement.展开更多
基金The authors would also like to thank NIT,Durgapur RIG#2 project for financial support and the Director of National In-stitute of Technology Durgapur,India,for his continuous en-couragement.
文摘A near eutectic Al−12.6Si alloy was developed with 0.0wt%,2.0wt%,4.0wt%,and 6.0wt%Al−5Ti−1B master alloy.The micro-structural morphology,hardness,tensile strength,elongation,and fracture behaviour of the alloys were studied.The unmodified Al−12.6Si al-loy has an irregular needle and plate-like eutectic silicon(ESi)and coarse polygonal primary silicon(PSi)particles in the matrix-likeα-Al phase.The P_(Si),E_(Si),andα-Al morphology and volume fraction were changed due to the addition of the Al−5Ti−1B master alloy.The hardness,UTS,and elongation improved due to the microstructural modification.Nano-sized in-situ Al3Ti particles and ex-situ TiB_(2)particles caused the mi-crostructural modification.The fracture images of the developed alloys exhibit a ductile and brittle mode of fracture at the same time.The Al−5Ti−1B modified alloys have a more ductile mode of fracture and more dimples compared to the unmodified alloy.
文摘Finite element analysis has been carried out to understand the effect of various processing routes and condition on the microscale deformation behavior of Al–4.5 Cu–2 Mg alloy.The alloy has been developed through four different routes and condition,i.e.conventional gravity casting with and without refiner,rheocasting and SIMA process.The optical microstructures of the alloy have been used to develop representative volume elements(RVEs).Two different boundary conditions have been employed to simulate the deformation behavior of the alloy under uniaxial loading.Finally,the simulated stress-strain behavior of the alloy is compared with the experimental result.It is found that the microstructural morphology has a significant impact on stress and strain distribution and load carrying capacity.The eutectic phase always carries a higher load than theα(Al)phase.The globularα(Al)grains with thinner and uniformly distributed eutectic network provide a better stress and strain distribution.Owing to this,SIMA processed alloy has better stress and strain distribution than other processes.Finally,the simulated yield strength of the alloy is verified by experiment and they have great agreement.
