The effect of Zn on the age hardening response in an Al-Mg-Si alloy
The effect of Zn on the age hardening response in an Al-Mg-Si alloy
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DOI：
10.1016/j.matdes.2014.09.086
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发表时间：
2015-01-01
影响因子：
8.4
通讯作者：
Zhang, J. S.
中科院分区：
文献类型：
--
作者：
Ding, X. P.;Cui, H.;Zhang, J. S.
提高Al-Mg-Si合金在烤漆循环中的时效硬化响应已成为汽车工业的研究热点。在本研究中，添加Zn可以改善时效硬化反应。在170℃时效20 min时，含3.0 wt.% Zn的Al-Mg-Si合金的时效硬度增量接近10HV，而含0.5 wt.% Zn的Al-Mg-Si合金时效后硬度略有下降。TEM显微组织分析表明，高Zn添加量对时效硬化响应的改善是由于eta- mgzn2和eta′相的GP （II）区析出所致。本文还研究了不同时效温度下添加Zn对Mg2Si （β”）亚稳硬化相析出行为的影响。(C) 2014 Elsevier Ltd.版权所有。
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.