V对Al-Cu-Mn-Ti-RE合金组织和性能的影响

孟凡生; 张卫文; 赵愈亮; 张大童; 杨超

doi:10.15980/j.tzzz.2016.04.001

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V对Al-Cu-Mn-Ti-RE合金组织和性能的影响
Effect of V on the Microstructure and Mechanical Properties of Al-5.0Cu-0.4Mn-0.1Ti-0.1RE Alloy
2016年36卷第4期页码：337-340
纸质出版日期： 2016 ，
DOI： 10.15980/j.tzzz.2016.04.001

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[1]孟凡生,张卫文,赵愈亮,张大童,杨超.V对Al-Cu-Mn-Ti-RE合金组织和性能的影响[J].特种铸造及有色合金,2016,36(04):337-340.

Meng Fansheng, Zhang Weiwen, Zhao Yuliang, et al. Effect of V on the Microstructure and Mechanical Properties of Al-5.0Cu-0.4Mn-0.1Ti-0.1RE Alloy[J]. Special Casting & Nonferrous Alloys, 2016,36(4):337-340.
[1]孟凡生,张卫文,赵愈亮,张大童,杨超.V对Al-Cu-Mn-Ti-RE合金组织和性能的影响[J].特种铸造及有色合金,2016,36(04):337-340. DOI： 10.15980/j.tzzz.2016.04.001.

Meng Fansheng, Zhang Weiwen, Zhao Yuliang, et al. Effect of V on the Microstructure and Mechanical Properties of Al-5.0Cu-0.4Mn-0.1Ti-0.1RE Alloy[J]. Special Casting & Nonferrous Alloys, 2016,36(4):337-340. DOI： 10.15980/j.tzzz.2016.04.001.

摘要

采用拉伸性能测试、金相显微镜（OM）、扫描电镜（SEM）及能谱分析（EDS）等手段

研究了添加微量V对重力铸造Al-5.0Cu-0.4Mn-0.1Ti-0.1RE合金力学性能及微观组织的影响。结果表明

加入0.25%的V

合金的抗拉强度、屈服强度、伸长率均达到峰值

这是由于V在合金中的细晶强化作用;当V含量达到0.35%时

合金的力学性能急剧下降

原因在于过量的V在合金中积聚生成粗大的块状Al

V相

在拉伸过程中Al

V相发生严重断裂

使得合金的抗拉强度、屈服强度和伸长率下降。

Abstract

Effects of V on mechanical properties and microstructure of Al-5.0Cu-0.4Mn-0.1Ti-0.1RE alloy prepared by gravity casting were investigated by tensile testing

optical microscope（OM）

scanning electron microscopy（SEM）and energy dispersive spectroscopy（EDS）.The results show that the tensile strength

yield strength and elongation of the alloy reach the peak value by adding 0.25% V both at as-cast and heat treatment state

which is attributed to the fine grain strengthening effect of V in the alloy.With 0.35%V addition

mechanical properties of the alloy are decreased sharply

which is attributed to excessive V accumulating in the alloy to generate a massive Al

V phase.During tensile process

the Al

V phase is broken severely

resulting in the decrease of tensile strength

yield strength and elongation of the alloy.