T6 Treatment and Its Effects on Corrosion Properties of an Mg-4Sn-4Zn-2Al Alloy

被引：11

作者：

Huang, Xuefei ^{[1
]}

Han, Guomin ^{[2
,3
]}

Huang, Weigang ^{[1
]}

机构：

[1] Sichuan Univ, Coll Mat Sci & Engn, Chengdu 610065, Sichuan, Peoples R China

[2] Inst Appl Phys & Computat Math, Beijing 100094, Peoples R China

[3] CAEP Software Ctr High Performance Numer Simulat, Beijing 100088, Peoples R China

来源：

MATERIALS | 2018年 / 11卷 / 04期

基金：

中国国家自然科学基金;

关键词：

magnesium; precipitation hardening; alloying; corrosion rate; MAGNESIUM ALLOYS; MICROSTRUCTURE; BEHAVIOR;

D O I：

10.3390/ma11040628

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The effects of T6 treatment (solid-solution and artificially aging at 200 degrees C) on the microstructure and corrosion properties of an Mg-4Sn-4Zn-2Al (TZA442) alloy were systematically investigated. The alloy exhibits a double-peak age-hardening behavior, i.e., one is 78 HV after 10 h of aging, and the other is 83 HV after 50 h of aging. The strengthening effect is mainly attributed to the simultaneously and mutually independent precipitation of the dispersively distributed MgZn2 and Mg2Sn precipitates. Solid-solution treatment can significantly decrease the corrosion rate of the TZA442 alloy. The following aging treatment can initially further decrease the corrosion rate in the under-aged state, but can afterward slightly increase it after 50 h of aging. The relationship between the microstructure and corrosion properties is also discussed.

引用

页数：10

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