The metastable extension of solid solubility and age hardening of rapidly solidified Al-Er alloy were inves- tigated.The splat foils(0.04～0.06 mm in thickness)and spun ribbons(0.02～0.04 mm in thickness)of Al-Er allo...The metastable extension of solid solubility and age hardening of rapidly solidified Al-Er alloy were inves- tigated.The splat foils(0.04～0.06 mm in thickness)and spun ribbons(0.02～0.04 mm in thickness)of Al-Er alloys were prepared by melt hammer-anvil and melt spinning techniques,respectively.The cooling rate was about 10~6～10~7 K/s.The metastable extended solid solubility of Er in Al evaluated by measurements of lat- tice parameters of rapidly solidified alloys was 0.75 at%.An age hardening response was observed in the quenched and aged specimen.The precipitate responsible for age hardening was identified to be Cu_3Au type cubic Al_3Er.展开更多
A novel Al−Mg−Er−Zr alloy was welded by highly efficient tandem GMAW,and the effect of Er on the porosity,microstructure and mechanical properties of the weld joints were investigated by comparing them with Al5083 all...A novel Al−Mg−Er−Zr alloy was welded by highly efficient tandem GMAW,and the effect of Er on the porosity,microstructure and mechanical properties of the weld joints were investigated by comparing them with Al5083 alloy weld joints.The results showed that compared to the welds without Er addition,the porosity decreased from 0.78%to 0.38%,which was attributed to the ability of Er to reduce the content of free hydrogen in the welds.Furthermore,the grain size near the fusion boundary and weld metal(WM)was significantly refined with the addition of Er.Grain refinement near the fusion boundary was attributed to the heterogeneous nucleation induced by Al_(3)(Er,Zr)from base metal,while grain refinement in WM was caused by the hindering effect of Al_(3)Er on grain boundary migration.Additionally,the ultimate tensile strength of the weld joints increased from 272.44 to 338.74 MPa with Er addition.The precipitation strengthening induced by Al_(3)Er contributed to an increase by 20%in strength.展开更多
基金The project was supported by National Natural Science Foundation of China(5870071).
文摘The metastable extension of solid solubility and age hardening of rapidly solidified Al-Er alloy were inves- tigated.The splat foils(0.04～0.06 mm in thickness)and spun ribbons(0.02～0.04 mm in thickness)of Al-Er alloys were prepared by melt hammer-anvil and melt spinning techniques,respectively.The cooling rate was about 10~6～10~7 K/s.The metastable extended solid solubility of Er in Al evaluated by measurements of lat- tice parameters of rapidly solidified alloys was 0.75 at%.An age hardening response was observed in the quenched and aged specimen.The precipitate responsible for age hardening was identified to be Cu_3Au type cubic Al_3Er.
基金the National Key R&D Program of China(No.2023YFB3407800)the National Natural Science Foundation of China(No.U2141213)the experimental supports by Instrumental Analysis Center of Shanghai Jiao Tong University,China.
文摘A novel Al−Mg−Er−Zr alloy was welded by highly efficient tandem GMAW,and the effect of Er on the porosity,microstructure and mechanical properties of the weld joints were investigated by comparing them with Al5083 alloy weld joints.The results showed that compared to the welds without Er addition,the porosity decreased from 0.78%to 0.38%,which was attributed to the ability of Er to reduce the content of free hydrogen in the welds.Furthermore,the grain size near the fusion boundary and weld metal(WM)was significantly refined with the addition of Er.Grain refinement near the fusion boundary was attributed to the heterogeneous nucleation induced by Al_(3)(Er,Zr)from base metal,while grain refinement in WM was caused by the hindering effect of Al_(3)Er on grain boundary migration.Additionally,the ultimate tensile strength of the weld joints increased from 272.44 to 338.74 MPa with Er addition.The precipitation strengthening induced by Al_(3)Er contributed to an increase by 20%in strength.
