Effect of double aging and microalloying on the age hardening behavior of a Mg-Sn-Zn alloy
Effect of double aging and microalloying on the age hardening behavior of a Mg-Sn-Zn alloy
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DOI：
10.1016/j.msea.2010.05.010
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发表时间：
2011-12-15
期刊：
影响因子：
6.4
通讯作者：
Hono, K.
中科院分区：
文献类型：
--
作者：
Sasaki, T. T.;Oh-ishi, K.;Hono, K.
研究了双重时效和微合金化对Mg-2.2Sn-0.5Zn合金时效硬化行为的影响。在343K预时效后的473K双重时效导致峰值硬度提高到80HV以上，这是由于密集弥散的MgZn2析出物中的非均匀形核细化了多边形析出物所致。添加0.2Cu(at.%)、0.2Ca-0.2Ag-0.2Zr或1.0Al微合金化可进一步提高合金的时效硬化响应。在433K时，合金的峰值硬度为95HV。这归因于细小棒状和多边形析出相的弥散和Al固溶硬化的协同作用。(C)2010爱思唯尔B.V.保留所有权利。
We have investigated the effect of double aging and microalloying on the age hardening behavior of a Mg-2.2Sn-0.5Zn alloy. The double aging at 473 K after pre-aging at 343 K lead to an increased peak hardness to more than 80 HV as a result of the refinement of the polygonal Mg2Sn precipitates by the heterogeneous nucleation at densely dispersed MgZn2 precipitates. The age hardening response of the Mg-2.2Sn-0.5Zn alloy was further enhanced by microalloying with 0.2Cu (at.%), 0.2Ca-0.2Ag-0.2Zr or 1.0Al. In particular, the peak hardness of the Mg-2.2Sn-0.5Zn-1.0Al alloy was 95 HV at 433K. which was attributed to the synergy effect of the dispersion of the fine rod and polygonal Mg2Sn precipitates and solution hardening with Al. (C) 2010 Elsevier B.V. All rights reserved.