As the lightest structural metal,Mg and Mg-based alloys have great potential applications in the aerospace,automotive and nuclear industries.However,such applications have been limited by low ductility and strength.Th...As the lightest structural metal,Mg and Mg-based alloys have great potential applications in the aerospace,automotive and nuclear industries.However,such applications have been limited by low ductility and strength.Theoretically,small grain sized structure can synchronously improve its ductility and strength.Yet,universally reliable grain ref inement techniques for the magnesium alloys are still under investigation and some are in strong debating.This paper presents a brief review of development of grain ref inement methods for magnesium alloys,which would contribute to a better understanding of the factors controlling grain ref inement and provide an outlook of future research in this fi eld.展开更多
The gradient of the equilibrium melting temperature distribution at the advancing liquid-solid interface of liquid side was derived.From which,a parameter,H,used for evaluating the abili- ty of grain refinement of sol...The gradient of the equilibrium melting temperature distribution at the advancing liquid-solid interface of liquid side was derived.From which,a parameter,H,used for evaluating the abili- ty of grain refinement of solute elements was proposed.Experiments on Al-based alloys show that the grain size decreases as the value of parameter,H,increases.Such a dependance indi- cates that the parameter H can be used for choosing grain refiner.展开更多
基金supported by National Natural Science Foundation of China(No.50701030)China Postdoctoral Science Foundation(No.:20070410716)
文摘As the lightest structural metal,Mg and Mg-based alloys have great potential applications in the aerospace,automotive and nuclear industries.However,such applications have been limited by low ductility and strength.Theoretically,small grain sized structure can synchronously improve its ductility and strength.Yet,universally reliable grain ref inement techniques for the magnesium alloys are still under investigation and some are in strong debating.This paper presents a brief review of development of grain ref inement methods for magnesium alloys,which would contribute to a better understanding of the factors controlling grain ref inement and provide an outlook of future research in this fi eld.
文摘The gradient of the equilibrium melting temperature distribution at the advancing liquid-solid interface of liquid side was derived.From which,a parameter,H,used for evaluating the abili- ty of grain refinement of solute elements was proposed.Experiments on Al-based alloys show that the grain size decreases as the value of parameter,H,increases.Such a dependance indi- cates that the parameter H can be used for choosing grain refiner.
