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.
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.
[1] HARDY H.The ageing characteristics of ternary Al-Cu alloys with Cd, In, Sn[J]. Journal of the Institute of Metals, 1952, 80(9): 483-492. [2] SILCOCK J, FLOWER M.Comments on a comparison of early and recent work on the effect of trace additions of Cd, In, or Sn on nucleation and growth of theta’ in Al-Cu alloys[J]. Scripta. Materialia, 2002, 46(5): 389-394. [3] BOYD J, NICHOLSON. A calorimetric determination of precipitate interfacial energies in two Al-Cu alloys[J]. Acta Metallurgica, 1971, 19(10): 1101-1109. [4] BROOK G.Precipitation in metals[M]. Stoke Poges, UK, Fulmer Research Institute Press, 1963. [5] RINGER. S, HONO .K, SAKURAI T. The effect of trace additions of sn on precipitation in Al-Cu alloys: An atom probe field ion microscopy study[J]. Metallurgical and Materials Transactions A, 1995, 26(9): 2207-2217. [6] KONNO M, SUZUKI H, KANOH O.The precipitation of θ′ phase in an Al-4Cu-0.06Sn alloy[J]. Journal of Japanese Institute of Metals, 1980, 44(10): 1135-1145. [7] SILCOCK J, HEAL T, HARDY H.The structural ageing characteristics of ternary aluminium-copper alloys with cadmium, indium, or tin[J]. Journal of the Institute of Metals, 1955, 84(1): 23-31. [8] BOURGEOIS L, DWYER C, WEYLAND M, et al.The magic thicknesses of θ′ precipitates in Sn-microalloyed Al-Cu[J]. Acta Materialia, 2012, 60(2): 633-644. [9] SILCOCK J, HEAL T.Structural ageing characteristics of binary Aluminium-Copper alloys[J]. Journal of the Institute of Metals, 1954, 82: 239-248. [10] 龚铸, 郑子樵, 贾敏, 等. Cu含量对含Sc铝锂合金显微组织和力学性能的影响[J]. 中国有色金属学报, 2016, 22(6): 1182-1190. GONG Zhu, ZHENG Ziqiao, JIA Min, et al.Effect of Cu content on the microstructure and mechanical properties of Sc- containing Al-Li alloy[J]. The Chinese Journal of Nonferrous Metals, 2016, 22(6): 1182-1190. [11] WOLVERTON C.Solute-vacancy binding in aluminum[J]. Acta Materialia, 2007, 55(17): 5867-5872. [12] BOURGEOIS L, NIE Jianfeng, MUDDLE B C.Assisted nucleation of θ′ phase in Al-Cu-Sn: The modified crystallography of tin precipitates[J]. Philosophical Magazine, 2005, 85: 3487-3509. [13] KONNO T, HIRAGA K, KAWASAKI M. Guinier-Preston (GP) zone revisited: atomic level observation by HAADF-TEM technique[J]. Scripta Materialia, 2001, 44(8/9): 2303-2307. [14] 潘峥嵘, 郑子樵, 李世晨, 等. In对Al-3.5Cu合金析出过程的影响[J]. 稀有金属材料与工程, 2011, 40(6): 1079-1083. PAN Zhengrong, ZHENG Ziqiao, LI Shichen, et al.Effect of In on the precipitation process of Al-3.5Cu alloy[J]. Rare Metal Materials and Engineering, 2011, 40(6): 1079-1083. [15] 舒军, 陈志国, 李世晨, 等. 微量Sn和In对Al-3.5Cu合金时效行为及微观组织演变的影响[J]. 中国有色金属学报, 2012, 22(9): 2486-2491. SHU Jun, CHEN Zhiguo, LI Shichen, et al.Effect of trace Sn(In) addition on ageing behaviour and microstructure evolution of Al-3.5% Cu alloy[J]. The Chinese Journal of Nonferrous Metals, 2012, 22(9): 2486-2491. [16] 舒军, 陈志国, 张继帅. 微量Sn对Al-2.5Cu-1.5Mg合金力学性能及微观组织的影响[J]. 中国有色金属学报, 2013, 23(8): 2140-2146. SHU Jun, CHEN Zhiguo, ZHANG Jishuai.Effect of trace Sn addition on mechanical property and microstructure of Al- 2.5Cu-1.5Mg alloy[J]. The Chinese Journal of Nonferrous Metals, 2013, 23(8): 2140-2146. [17] 范春平, 郑子樵, 罗先甫, 等. Ge在Al-3.5Cu合金中的微合金化作用[J]. 稀有金属材料科学与工程, 2014, 43(7): 1649-1654. FAN Chunping, ZHENG Ziqiao, LUO Xianfu, et al.Effect of Ge on the Al-3.5Cu alloy[J]. Rare Metal Materials and Engineering, 2014, 43(7): 1649-1654. [18] KIMURA H, HASIGUTI R.Interaction of vacancies with Sn atoms and the rate of GP zone formation in an Al-Cu-Sn alloy[J]. Acta Metallurgica, 1961, 9(12): 1076-1078. [19] NAGAI Y, MURAYAMA M, TANG Z, et al.Role of vacancy-solute complex in the initial rapid age hardening in an Al-Cu-Mg alloy[J]. Acta Matererialia, 2001, 49: 913-920. [20] LIAO Zhongquan, LI Shichen, ZHENG Ziqiao, et al.The effect of Ge addition on Al-3.5Cu-0.4Mg(wt.%) alloy[J]. Scripta Mater, 2012, 66(7): 447-450. (编辑高海燕)
2018, Vol. 23 
