Microstructures and mechanical properties of high strength Mg-Zn-Mn alloy

来源期刊：中国有色金属学报(英文版)2008年增刊第1期

论文作者：张丁非 石国梁 戴庆伟 袁炜 段红玲

文章页码：59 - 63

Key words：high strength; Mg-Zn-Mn alloy; microstructures; mechanical properties

Abstract: 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 pure α-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.

基金信息：the National Outstanding Youth Scientific Fund of China
the “973” National Grand Theoretical Research Program of China
the National Science and Technology Supporting Program