Effects of Minor Gallium Addition on Microstructure and Mechanical Properties of A356 Alloy

Lin Jinping1; Zhao Hongsheng2; Zhu Guoliang1; Wang Jun1; Zhang Jun2; Sun Baode1

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Effects of Minor Gallium Addition on Microstructure and Mechanical Properties of A356 Alloy
Vol. 29, Issue 10, Pages: 957-960(2009)
Published： 2009 ，
DOI：

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[1]林金平,赵洪生,祝国梁,王俊,张军,孙宝德.微量Ga对A356合金微观组织及力学性能的影响[J].特种铸造及有色合金,2009,29(10):957-960+881.

Lin Jinping1, Zhao Hongsheng2, Zhu Guoliang1, et al. Effects of Minor Gallium Addition on Microstructure and Mechanical Properties of A356 Alloy. [J]. Special Casting & Nonferrous Alloys 29(10):957-960(2009)
[1]林金平,赵洪生,祝国梁,王俊,张军,孙宝德.微量Ga对A356合金微观组织及力学性能的影响[J].特种铸造及有色合金,2009,29(10):957-960+881. DOI：

Lin Jinping1, Zhao Hongsheng2, Zhu Guoliang1, et al. Effects of Minor Gallium Addition on Microstructure and Mechanical Properties of A356 Alloy. [J]. Special Casting & Nonferrous Alloys 29(10):957-960(2009) DOI：

摘要

研究了微量Ga对A356合金的微观组织和力学性能的影响。结果表明

Ga含量的增加（0.02%～0.06%）

对均匀化退火后A356合金室温抗拉强度影响不明显

在673K时抗拉强度提高14.5%

但Ga的加入显著降低合金的伸长率

且伸长率随着温度的增加而降低。Ga对T6处理后的强度略微提高

伸长率有所降低

但对合金高温抗拉强度和伸长率的影响作用效果明显

能大幅度提高高温抗拉强度

同时降低了合金的伸长率。

Abstract

Effects of trace gallium （0.02%

.06%） on microstructure and tensile strength of A356 alloys were investigated. The results show that ambient tensile strength of homogenized annealed A356 alloy has been slightly affected while elevated tensile strength is increased by 14.5%

meanwhile

elongation is greatly decreased with increasing in Ga addition to 0.06%. Ambient tensile strength of the T6 treated A356 alloy with slightly decreasing in elongation is somewhat improved

however

elevated tensile strength is greatly improved

and elongation is obviously decreased with Ga addition.