Microstructure Evolution of Mg-4.3Zn-0.7Y-0.6Zr Alloy during Solution Heat Treatment
Microstructure Evolution of Mg-4.3Zn-0.7Y-0.6Zr Alloy during Solution Heat Treatment
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Mg-4.3Zn-0.7Y-0.6Zr合金固溶热处理过程中的组织演变
DOI：
10.2320/matertrans.m2013378
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发表时间：
2014-02-01
影响因子：
1.2
通讯作者：
Zhang, Zhongming
中科院分区：
文献类型：
--
作者：
Li, Junjie;Zhang, Yacong;Zhang, Zhongming
研究了Mg-4.3Zn-0.7Y-0.6Zr（质量分数）合金在300 ~ 500 ℃固溶热处理12 h后的组织演变。在铸态和300 ℃固溶处理12 h状态下，显微组织由I相和α-Mg组成。经400 ℃固溶处理12 h后，显微组织中除I相和α-Mg外，还出现了长条状的Zn 2 Zr相。在500 ℃固溶12 h的试样中，发现了少量的Zn 2 Zr和Mg0.97Zn0.03相，随着热处理温度的升高，不同状态的相组成为：α-Mg + I相（铸态）-> α-Mg + I相（300 ℃下12小时）-> α-Mg + I相+W相+Zn 2 Zr（400 ℃下12小时）-> α-Mg + Zn 2 Zr + Mg 0.97Zn 0.03（500 ℃下12小时）。
The microstructure evolution in a Mg-4.3Zn-0.7Y-0.6Zr (mass%) alloy was investigated during solution heat treatment from 300 to 500 degrees C for 12 h. In the as-cast and solution-treated at 300 degrees C for 12 h states, the microstructures are consisting of I-phase and alpha-Mg. After solution treated at 400 degrees C for 12 h, besides I-phase and alpha-Mg, some long strip precipitates-which are determined as Zn2Zr phase-, also appear in the microstructure. In the solution-treated sample at 500 degrees C for 12 h, small amounts of Zn2Zr and Mg0.97Zn0.03 phases have been found. With the increase of heat treatment temperature, the phase constituents for different states are: alpha-Mg + I-phase (as-cast) -> alpha-Mg + I-phase (300 degrees C for 12h) -> alpha-Mg + I-phase + W-phase + Zn2Zr (400 degrees C for 12h) -> alpha-Mg + Zn2Zr + Mg0.97Zn0.03 (500 degrees C for 12 h).