Effect of Sr addition on microstructure evolution and mechanical properties of Zn-4%Al hypoeutectic alloy

被引：16

作者：

Liu, Yang ^{[1
,2
]}

Geng, Cong ^{[1
]}

Zhu, Yunke ^{[1
]}

Chen, Xu ^{[2
,3
]}

机构：

[1] Xiangtan Univ, Sch Mech Engn, Xiangtan 411105, Peoples R China

[2] Xiangtan Univ, Key Lab Mat Design & Preparat Technol Hunan Prov, Xiangtan 411105, Peoples R China

[3] Xiangtan Univ, Hunan Prov Key Lab Thin Film Mat & Devices, Xiangtan 411105, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2017年 / 695卷

关键词：

ZnAl4; alloy; Strontium; Eutectic morphology; Mechanical properties; GRAIN-REFINEMENT; ALUMINUM-ALLOYS; MAGNESIUM ALLOYS; ZNAL4Y ALLOY; ELEMENTS MG; AL-ALLOY; ZN; CA; BEHAVIOR; ZINC;

D O I：

10.1016/j.jallcom.2016.11.096

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 Sr in the range of 0-0.15 wt% on microstructure and mechanical properties of ZnAl4 alloy were systematically studied by various characterization methods. It was found that the morphology of primary eta-Zn phase and lamellar eutectic varied significantly with increasing Sr content in ZnAl4 alloys, which resulted in the remarkable improvement of mechanical properties. The tensile strength, elongation, impact toughness and HB hardness of ZnAl4 alloys increased with increasing Sr content, peaking at 238 MPa, 5.70%, 74.6 J cm(-2) and 82.8 kgf mm(-2) with 0.1 wt% Sr, respectively. It can be concluded that the optimal addition of Sr to ZnAl4 alloy may be 0.1 wt% which contributed to finer eta-Zn phase and lamellar eutectic. The aim of current study was to provide experimental evidence to establish a correlation between the microstructure and mechanical properties to search for high performance zinc - aluminum die casting alloys. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：443 / 451

页数：9

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