DifFusion couples, Fe-6.8 wt% Al-1.0 wt% Si/Fe and Fe-6.3 wt% Al-0.9 wt% Si/Fe were constructed and separately annealed at 1050℃ for 3 h and at 1000℃ for 64 h. The concentration profiles of Fe, Al and Si atoms in th...DifFusion couples, Fe-6.8 wt% Al-1.0 wt% Si/Fe and Fe-6.3 wt% Al-0.9 wt% Si/Fe were constructed and separately annealed at 1050℃ for 3 h and at 1000℃ for 64 h. The concentration profiles of Fe, Al and Si atoms in these couples were measured by electron probe micro-analysis （EPMA）, while the diffusion behavior was also simulated by coupling thermodynamic and kinetic properties of Fe-Al-Si system. The simulation results were in good agreement with the measured concentration profiles showing the validity of dynamic parameters of Fe-Al-Si system, Calculation was made for Fe-7 wt% Al-1 wt% Si/Fe diffusion couples at 1000℃ with different diffusion time. Silicon uphill was found under the influence of aluminum.展开更多
The effects of Al(Fe,Mn)Si particles controlled by different hot-rolling deformations on the microstructure evolution,texture evolution,and formabilities of Al−Mg−Si−Zn alloy were systematically investigated using OM,...The effects of Al(Fe,Mn)Si particles controlled by different hot-rolling deformations on the microstructure evolution,texture evolution,and formabilities of Al−Mg−Si−Zn alloy were systematically investigated using OM,SEM,TEM,XRD,and tensile tests.The results indicate that Al(Fe,Mn)Si particles with different size and number distribution characteristics can be obtained by adjusting the hot-rolling deformation degree(59%,74%and 87%),and these differences in particle distribution are the main factors affecting the recrystallization nucleation and grain growth during solution treatment.After T4P treatment,the grain orientations in the Al−Mg−Si−Zn alloy sheets with 59%and 74%hot-rolling deformation tend to be randomly distributed.In comparison,the sheet with 87%hot-rolling deformation consists of R{124}<211>,CubeND{100}<013>,Copper{112}<111>and Brass{011}<211>texture components.The medium size and number of Al(Fe,Mn)Si particles obtained at 74%hot-rolling deformation cause fine grains and randomly distributed texture,which significantly improves the formability of Al−Mg−Si−Zn alloy.展开更多
基金supported by the National Natural Science Foundation of China under Grant Nos. 50971137 and 50934011the National Basic Research program of China under GrantNo. 2010CB630802.
文摘DifFusion couples, Fe-6.8 wt% Al-1.0 wt% Si/Fe and Fe-6.3 wt% Al-0.9 wt% Si/Fe were constructed and separately annealed at 1050℃ for 3 h and at 1000℃ for 64 h. The concentration profiles of Fe, Al and Si atoms in these couples were measured by electron probe micro-analysis （EPMA）, while the diffusion behavior was also simulated by coupling thermodynamic and kinetic properties of Fe-Al-Si system. The simulation results were in good agreement with the measured concentration profiles showing the validity of dynamic parameters of Fe-Al-Si system, Calculation was made for Fe-7 wt% Al-1 wt% Si/Fe diffusion couples at 1000℃ with different diffusion time. Silicon uphill was found under the influence of aluminum.
基金the National Key R&D Program of China(Nos.2020YFF0218200,2016YFB0300802)for financial support。
文摘The effects of Al(Fe,Mn)Si particles controlled by different hot-rolling deformations on the microstructure evolution,texture evolution,and formabilities of Al−Mg−Si−Zn alloy were systematically investigated using OM,SEM,TEM,XRD,and tensile tests.The results indicate that Al(Fe,Mn)Si particles with different size and number distribution characteristics can be obtained by adjusting the hot-rolling deformation degree(59%,74%and 87%),and these differences in particle distribution are the main factors affecting the recrystallization nucleation and grain growth during solution treatment.After T4P treatment,the grain orientations in the Al−Mg−Si−Zn alloy sheets with 59%and 74%hot-rolling deformation tend to be randomly distributed.In comparison,the sheet with 87%hot-rolling deformation consists of R{124}<211>,CubeND{100}<013>,Copper{112}<111>and Brass{011}<211>texture components.The medium size and number of Al(Fe,Mn)Si particles obtained at 74%hot-rolling deformation cause fine grains and randomly distributed texture,which significantly improves the formability of Al−Mg−Si−Zn alloy.
