Cd元素对Al-4Cu合金析出过程的影响

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Abstract The effects of trace addition of Cd elements on Al-Cu alloy were investigated by the micro-hardness test, tensile test and transmission electron observation (TEM). The results indicate that due to the strong interaction between Cd elements and vacancies, when the alloys are aged at 100 ℃, the additon of trace Cd inhibits the formation of GP zones, and it further decreases the aging reponse rate, the peak-aging hardness and tensile strength. When the alloys are aged at 150 ℃, the Cd-rich particles in Al-Cu-Cd alloy will act as heterogeneous nucleation position of θ′ phases and then promote the precipitation of θ′ phases is (110)_Cd‖(001)_Al‖(001)_θ, which improves the tensile strength of the alloy. The orientation relationship of Cd particles θ′ phases and Al-matrix.

Key words： Cd element micro-alloying strengthen phase HRTEM analysis Al-Cu alloy

Received: 17 April 2017 Published: 12 July 2019

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TG146.2

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	GONG Zhu
	ZHENG Ziqiao

Cite this article:

GONG Zhu,ZHENG Ziqiao. Effects of Cd element on the deposition process of Al-4Cu alloy[J]. Materials Science and Engineering of Powder Metallurgy, 2018, 23(2): 157-166.

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http://pmbjb.csu.edu.cn/EN/ OR http://pmbjb.csu.edu.cn/EN/Y2018/V23/I2/157

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