Compositional optimization of Mg-Sn-Al alloys for higher age hardening response

被引：98

作者：

Elsayed, F. R. ^{[1
,2
]}

Sasaki, T. T. ^{[1
]}

Mendis, C. L. ^{[1
]}

Ohkubo, T. ^{[1
]}

Hono, K. ^{[1
,2
]}

机构：

[1] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan

[2] Univ Tsukuba, Grad Sch Pure & Appl Sci, Tsukuba, Ibaraki 3050006, Japan

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2013年 / 566卷

关键词：

Magnesium alloy; Precipitation hardening; Mg-Sn; Mg wrought alloy; ZN ALLOY; LOW-TEMPERATURE; PRECIPITATION; SYSTEM; TEM; CA;

D O I：

10.1016/j.msea.2012.12.041

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The effect of Al additions and microalloying on the age hardening response of Mg-Sn alloys has been investigated to optimize the composition for the highest age hardening response. The addition of 3 at%Al lead to the best enhancement in peak hardness being 72 HV at 200 degrees C. The age hardening response was further enhanced from 73 to 81 HV by microalloying with 0.5 Zn, leading to the optimized alloy composition of Mg-2.2Sn-3Al-0.5Zn (at%) or Mg-9.8Sn-3.0Al-1.2Zn (wt%), i.e., TAZ1031. The enhancement in the peak strength and aging behavior is attributed to the solid solution hardening due to Al, the refinement of the Mg2Sn precipitates, the occurrence of Mg17Al12 precipitates, and the increase in the number density of non-basal Mg2Sn precipitates. (c) 2012 Elsevier B.V. All rights reserved.

引用

页码：22 / 29

页数：8

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