Effects of silicon and thermo-mechanical process on microstructure and properties of Cu-10Ni-3Al-0.8Si alloy

被引：43

作者：

Shen, Leinuo ^{[1
,2
]}

Li, Zhou ^{[1
]}

Zhang, Zheming ^{[1
]}

Dong, Qiyi ^{[1
]}

Xiao, Zhu ^{[1
]}

Lei, Qian ^{[1
]}

Qiu, Wenting ^{[1
]}

机构：

[1] Cent S Univ, Sch Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China

[2] Minist Educ, Key Lab Nonferrous Met Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China

来源：

MATERIALS & DESIGN | 2014年 / 62卷

基金：

中国国家自然科学基金;

关键词：

Microstructure; Strength; Precipitation; Orientation relationship; PRECIPITATION; STRENGTH;

D O I：

10.1016/j.matdes.2014.04.053

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

10Ni-3Al-0.8Si alloy with ultra-high strength was designed and its microstructure was studied using optical microscopy, scanning electron microscopy, transmission electron microscopy. The alloy went through a set of thermo-mechanical process: solution treated at 950 degrees C for 4 h, then cold-rolled by 50% and aged at 450 degrees C for 8 h, followed by 60% cold-rolling and aging at 450 degrees C for 8 h. After these treatment, the tensile strength was 1180 MPa, yield strength was 1133 MPa and electrical conductivity was 18.1% IACS, respectively. The comprehensive properties, especially the electrical conductivity of the designed alloy, were much higher than those of traditional Cu-Ni-Al alloys. The addition of silicon in the designed alloy hindered the precipitation of large-scale NiAl phase and improved the strength of the alloy. The orientation relationships between delta-Ni2Si, Ni3Al precipitates and copper matrix were: [001](Cu)parallel to[001](Ni3Al)parallel to[001](delta), (110)(Cu)parallel to(110)(Ni3Al)parallel to(010)delta, (1 (1) over bar 0)(Cu)parallel to(1 (1) over bar 0)(Ni3Al)parallel to(100)delta, respectively. (C) 2014 Published by Elsevier Ltd.

引用

页码：265 / 270

页数：6

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