摘要
The microstructures and mechanical properties of a new Mg-6%Zn-1%Mn(mass fraction) wrought magnesium alloy were studied,which could be extruded smoothly at 310-330℃with a complete dynamic recrystallization.After solution treatment one and two-step aging techniques were used.All as-aged microstructures contained two types of dispersed phases:β' phases and pureα-Mn particles.The two-step aging had a better strengthening effect than the traditional one-step aging,and the strength value achieved by the two-step aging could reach that of the ZK60 wrought magnesium alloy.The outstanding precipitation strengthening effect of the alloy should be attribute to the GP zones,diffusive solute-rich zones and some metastable phases formed during the first step aging that provide more effective nuclei for Mg-Zn strengthening phases during the second step aging.
The microstructures and mechanical properties of a new Mg-6%Zn-1%Mn (mass fraction) wrought magnesium alloy were studied, which could be extruded smoothly at 310-330℃ with a complete dynamic recrystallization. After solution treatment one and two-step aging techniques were used. All as-aged microstructures contained two types of dispersed phases: ff phases and pure a-Mn particles. The two-step aging had a better strengthening effect than the traditional one-step aging, and the strength value achieved by the two-step aging could reach that of the ZK60 wrought magnesium alloy. The outstanding precipitation strengthening effect of the alloy should be attribute to the GP zones, diffusive solute-rich zones and some metastable phases formed during the first step aging that provide more effective nuclei for Mg-Zn strengthening phases during the second step aging.
出处
《中国有色金属学会会刊:英文版》
CSCD
2008年第A01期59-63,共5页
Transactions of Nonferrous Metals Society of China
基金
Projects(2006BAE04B03,2007BAQ00134-04)supported by the National Science and Technology Supporting Program
Project(2007CB613700)supported hy the"973"National Grand Theoretical Research Program of China
Project(50725413)supportedby the National Outstanding Youth Scientific Fund of China
关键词
镁锌锰合金
微观结构
强韧化机制
挤压
high strength
Mg-Zn-Mn alloy
microstructures
mechanical properties