Effect of Trace Er and Zr Addition on Microstructure and Properties of ZL205A Alloy

被引：0

作者：

Guo Tingbiao ^{[1
,2
]}

Zhang Zhanfei ^{[1
]}

Ding Wanwu ^{[1
,2
]}

Yuan Zizhou ^{[1
,2
]}

机构：

[1] Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Peoples R China

[2] Minist Educ, Key Lab Nonferrous Met Alloys & Proc, Lanzhou 730050, Peoples R China

来源：

RARE METAL MATERIALS AND ENGINEERING | 2016年 / 45卷 / 10期

关键词：

ZL205A; fluidity; microstructure; mechanical properties; MECHANICAL-PROPERTIES; ALUMINUM-ALLOY;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Rare earth (RE) elements Er and Zr both of 0.05, 0.15 and 0.25 wt% were added to ZL205A alloy. The effect of trace RE addition on the microstructure and properties of as-cast and T5 heat-treated alloys was investigated. The results show that trace Er and Zr elements can effectively improve the fluidity of the alloy, refine the grains and promote the 0 phase to concentrate on the intersection of the grain boundaries. When their addition amount is 0.15 wt%, the mechanical properties of as-cast alloy decline greatly compared with those of the initial alloy; after T5 heat-treatment, the tensile strength, the Vickers hardness and the elongation reach 358 MPa, 1070 MPa and 2%, respectively, when the comprehensive performance is the best. T5 heat-treatment can make the microstructure and composition uniform, and also lead solute atoms to diffuse sufficiently. Therefore, it hinders the dislocation movement and sub-boundary migration during the deformation process, taking an adverse impact on the elongation.

引用

页码：2621 / 2627

页数：7

共 16 条

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