Influence of trace Zr on the microstructure and elevated temperature properties of an Al-Si-Cu-Ni-Mg piston alloy

被引：8

作者：

Gao, Tong ^{[1
]}

Ringer, Simon ^{[2
]}

Liu, Guiliang ^{[3
]}

Liu, Xiangfa ^{[1
]}

机构：

[1] Shandong Univ, Key Lab Liquid Solid Struct Evolut & Proc Mat, Minist Educ, Jinan 250061, Shandong, Peoples R China

[2] Univ Sydney, Australian Ctr Microscopy & Microanal, Sydney, NSW 2006, Australia

[3] Shandong Al & Mg Melt Tech Co Ltd, Jinan 250061, Shandong, Peoples R China

来源：

MATERIALS RESEARCH EXPRESS | 2019年 / 6卷 / 05期

基金：

中国国家自然科学基金;

关键词：

piston alloy; precipitation; elevated-temperature mechanical properties; MECHANICAL-PROPERTIES; PRECIPITATION EVOLUTION; TI ALLOYS; PHASE; STRENGTH; IMPACT;

D O I：

10.1088/2053-1591/ab06ed

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of trace Zr on the microstructure, precipitates and mechanical properties on an Al-12.6 wt% Si-4 wt% Cu-1.5 wt% Ni-1.5 wt% Mg piston alloy was studied in this paper. The alpha-Al dendrites are refined, resulting in a more compact distribution of primary intermetallics. The main precipitates are S (Al2CuMg) after T6 heat treatment. It was found that the S precipitates are denser and finer in the Zr- contained alloy whereas L1(2)-ZrAl3 particles also precipitate. The hardness and elevated temperature tensile strength of the piston alloy were both improved, indicating the positive effect of trace Zr.

引用

页数：7

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