The effect of Zn on the age hardening response in an Al-Mg-Si alloy

被引：79

作者：

Ding, X. P. ^{[1
]}

Cui, H. ^{[2
]}

Zhang, J. X. ^{[1
]}

Li, H. X. ^{[1
]}

Guo, M. X. ^{[1
]}

Lin, Z. ^{[1
]}

Zhuang, L. Z. ^{[1
]}

Zhang, J. S. ^{[1
]}

机构：

[1] Univ Sci & Technol Beijing, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China

[2] Univ Sci & Engn Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China

来源：

MATERIALS & DESIGN | 2015年 / 65卷

关键词：

Aluminum alloys; Phase diagram; Age hardening response; Precipitation behavior; Paint-bake cycle; MECHANICAL-PROPERTIES; ALUMINUM-ALLOY; PRECIPITATION; MICROSTRUCTURE; KINETICS; COPPER;

D O I：

10.1016/j.matdes.2014.09.086

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Enhancing the age hardening response in Al-Mg-Si alloys during paint-bake cycle has become a research focus in automotive industry. In this study, an improvement of age hardening response can be achieved by Zn additions. The age hardness increment approaches 10HV in an Al-Mg-Si alloy containing 3.0 wt.% Zn when aged at 170 degrees C for 20 min, while in an Al-Mg-Si alloy containing 0.5 wt.% Zn, the hardness slightly decreases after aging. The analysis of microstructures through TEM shows that the improvement of age hardening response caused by high amount of Zn additions is attributed to the precipitations of GP (II)-zones of eta-MgZn2 and eta' phases. The effect of Zn additions on the precipitation behavior of the metastable hardening phase of Mg2Si (beta '') at different aging temperature is investigated as well in this study. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：1229 / 1235

页数：7

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