Effect of Sn Addition on the Microstructural Evolution and Mechanical Properties of Al-Cu Alloys

Chen Bao’an; Zhu Zhixiang; Zhang Qiang; Han Yu; Chen Xin; Liu Gang; Yang Changlong; Yu Xin

doi:10.15980/j.tzzz.2016.05.027

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Effect of Sn Addition on the Microstructural Evolution and Mechanical Properties of Al-Cu Alloys
Vol. 36, Issue 5, Pages: 540-543(2016)
Published： 2016 ，
DOI： 10.15980/j.tzzz.2016.05.027

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[1]陈保安,祝志祥,张强,韩钰,陈新,刘刚,杨长龙,于鑫.Sn对Al-Cu合金微观组织与力学性能的影响[J].特种铸造及有色合金,2016,36(05):540-543.

Chen Bao’an, Zhu Zhixiang, Zhang Qiang, et al. Effect of Sn Addition on the Microstructural Evolution and Mechanical Properties of Al-Cu Alloys. [J]. Special Casting & Nonferrous Alloys 36(5):540-543(2016)
[1]陈保安,祝志祥,张强,韩钰,陈新,刘刚,杨长龙,于鑫.Sn对Al-Cu合金微观组织与力学性能的影响[J].特种铸造及有色合金,2016,36(05):540-543. DOI： 10.15980/j.tzzz.2016.05.027.

Chen Bao’an, Zhu Zhixiang, Zhang Qiang, et al. Effect of Sn Addition on the Microstructural Evolution and Mechanical Properties of Al-Cu Alloys. [J]. Special Casting & Nonferrous Alloys 36(5):540-543(2016) DOI： 10.15980/j.tzzz.2016.05.027.

摘要

采用透射电镜分析和单轴拉伸性能测试

对比研究了不同Sn添加量（0

0.05%

0.10%）对Al-2.5Cu合金时效析出微观组织以及力学性能的影响。结果表明

随着Sn的添加

Al-Cu合金中Al2Cu沉淀相颗粒的尺寸减小

同时密度增大

显示出明显的微合金化效果。与微观组织演变相对应

合金的屈服强度随Sn的添加而大幅提高

0.1%的Sn添加后合金在473K下的峰值时效屈服强度提高近50%

但是合金的塑性随Sn的添加而降低。

Abstract

Effects of Sn addition（0

0.05%

0.10%）on microstructural evolution and mechanical properties of Al-2.5Cu alloy were investigated comparatively by using transmission electron microscopy（TEM）and tensile testing.The results show that the Sn addition can decrease precipitate size and increase precipitate number density

indicating a notable microalloying effect.The yield strength of alloys is increased with the Sn addition

and the peak-aged strength of the Al-2.5Cu-0.1Sn is improved by 50%compared with the Sn-free Al-2.5Cu alloy.However

the ductility of alloy is reduced with the Sn addition.