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.
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收藏
页数：7
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