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.
龚铸, 郑子樵. Cd元素对Al-4Cu合金析出过程的影响[J]. 粉末冶金材料科学与工程, 2018, 23(2): 157-166.
GONG Zhu, ZHENG Ziqiao. Effects of Cd element on the deposition process of Al-4Cu alloy. Materials Science and Engineering of Powder Metallurgy, 2018, 23(2): 157-166.
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2018, Vol. 23 
