固溶处理对铸态Mg-4Al-2Si合金组织和性能的影响

宋佩维

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固溶处理对铸态Mg-4Al-2Si合金组织和性能的影响
Effects of Solution Treatment on Microstructure and Mechanical Properties of Mg-4Al-2Si Alloy
2011年31卷第4期页码：311-314
纸质出版日期： 2011 ，
DOI：

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[1]宋佩维.固溶处理对铸态Mg-4Al-2Si合金组织和性能的影响[J].特种铸造及有色合金,2011,31(04):311-314+394.

Song Peiwei. Effects of Solution Treatment on Microstructure and Mechanical Properties of Mg-4Al-2Si Alloy[J]. Special Casting & Nonferrous Alloys, 2011,31(4):311-314.
[1]宋佩维.固溶处理对铸态Mg-4Al-2Si合金组织和性能的影响[J].特种铸造及有色合金,2011,31(04):311-314+394. DOI：

Song Peiwei. Effects of Solution Treatment on Microstructure and Mechanical Properties of Mg-4Al-2Si Alloy[J]. Special Casting & Nonferrous Alloys, 2011,31(4):311-314. DOI：

摘要

研究了固溶处理对铸态Mg-4Al-2Si（AS42）合金组织和性能的影响。结果表明

铸态与热处理态合金均由α-Mg基体、β-Mg17Al12相和Mg2Si相3部分组成。固溶处理使合金中的β-Mg17Al12相发生部分溶解

汉字状Mg2Si相颗粒出现球状化

合金的力学性能有较大幅度的提高。铸态与热处理态合金的断裂形式均为准解理脆性断裂。

Abstract

Effects of solid solution treatment（T4） on microstructure and mechanical properties of Mg-4Al-2Si（AS42） alloy were investigated.The results show that the alloy at both as-cast and heat treatment states is composed of α-Mg matrix

β-Mg17Al12 phase and Mg2Si phase.Mechanical properties of the T4 treated alloy are remarkably improved as a result of partially dissolution of β-Mg17Al12 phase and the spheroidization of Chinese script Mg2Si phase.The fracture mechanism of the both as-cast and T4 treated alloy is characterized by quasi-cleavage brittle fracture.