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| MICROSTRUCTURE AND MECHANICAL PROPERTIES EVOLUTIONS OF CONTINUOUS COLUMNAR-GRAINED CuAlNi ALLOY WIRES DURING DIELESS DRAWING PROCESS |
| WANG Zhen, LIU Xuefeng, XIE Jianxin |
| Key Laboratory for Advanced Materials Processing (MOE), University of Science and Technology Beijing, Beijing 100083 |
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Cite this article:
WANG Zhen LIU Xuefeng XIE Jianxin. MICROSTRUCTURE AND MECHANICAL PROPERTIES EVOLUTIONS OF CONTINUOUS COLUMNAR-GRAINED CuAlNi ALLOY WIRES DURING DIELESS DRAWING PROCESS. Acta Metall Sin, 2012, 48(7): 867-874.
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Abstract Dieless drawing experiments of continuous columnar-grained Cu-14.0%Al-3.8%Ni (mass fraction) alloy wires were carried out at drawing speeds of 0.8-1.1 mm/s and deformation temperatures of 650-900 ℃, when the feeding speed and distance between the heating and the cooling sources kept invariant at 0.50 mm/s and 15 mm, respectively. Effects of dieless drawing parameters on the microstructure and mechanical properties of the alloy were investigated, and the mechanism of microstructure and mechanical properties evolutions of the deformed alloy was discussed. It was found that the straight continuous columnar-grained boundaries of the alloy wires evolved into regular small zigzag, disordered large zigzag and recrystallized boundaries. When the deformation temperature was 650 ℃ and the drawing speed was 0.8 and 0.9 mm/s, the alloy remained continuous columnar grains with straight boundaries after dieless drawing, while the straight columnar-grained boundaries gradually transformed into zigzag boundaries with the deformation temperature and drawing speed increasing. When the drawing speed was 0.9 mm/s and the deformation temperature up to 850 ℃, the alloy exhibited obviously incomplete dynamic recrystallized microstructure characteristic, $i.e$. the original columnar grains were elongated along the deformation direction, and small dynamic recrystallized grains generated at parts of zigzag grain boundaries. The alloy occurred complete dynamic recrystallization at the deformation temperature of 900 ℃, and the deformed columnar grains were completely replaced by numerous equiaxed dynamic recrystallized grains with larger size. The tensile strengths of the alloy after dieless drawing first showed a very modest increase trend and then decreased greatly, while the elongations kept decrease.
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Received: 10 April 2012
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| Fund: National Natural Science Foundation of China |
| [1] Zhu H, Matsuda J, Maruyama K. Mater Sci Eng, 2005; A397: 58[2] Liu T Y, Robinson J S, Mccarthy M A. J Mater Process Technol, 2004; 153–154: 185[3] Motoyasu G, Kaneko M, Soda H, Mclean A. Metall Mater Trans, 2001; 32A: 585[4] Cai L S, Yu Y Q, Yin Z H, Wang D F, Li W G. Heat Treat Met, 2006; 31: 53(蔡莲淑, 余业球, 尹占华, 王德芳, 黎沃光. 金属热处理, 2006; 31: 53)[5] Liu X F, Li W H, Xie J X. Chin J Nonferrous Met, 2008; 18: 1248(刘雪峰, 李卫河, 谢建新. 中国有色金属学报, 2008; 18: 1248)[6] Zhang H, Xie J X, Wang Z D. J Univ Sci Technol Beijing, 2004; 11: 240[7] Li Y G, Quick N R, Kar A. J Mater Process Technol, 2002; 123: 451[8] Furushima T, Manabe K. J Mater Process Technol, 2007; 187–188: 236[9] Wang Z T, Zhang S H, Xu Y, Luan G F, Bai G R. J Mater Process Technol, 2002; 120: 90[10] Carolan R, Tiernan P. J Mater Process Technol, 2009; 209: 3335[11] Furushima T, Manabe K. J Mater Process Technol, 2008; 201: 123[12] Naughton M D, Tiernan P. J Mater Process Technol, 2007; 191: 310[13] Li Y G, Nathaniel R Q, Aravinda K. Mater Sci Eng, 2003; A358: 59[14] Tiernan P, Hillery M T. J Mater Process Technol, 2004; 155–156: 1178[15] Liu X F, Wu Y H, Xie J X. Sci Chin, 2009; 52E: 2232[16] He Y. PhD Thesis, University of Science and Technology Beijing, 2011(何勇. 北京科技大学博士学位论文, 2011)[17] Wang Z, Liu X F, Xie J X. Prog Nat Sci–Mater Int, 2011; 21: 368[18] Krishnan R V, Delaey L, Tas H, Warlimont H. J Mater Sci, 1974; 9: 1536[19] Zhou Z Q, Yue X L, Huo D P. Ordnance Mater Sci Eng, 1998; 21: 3(周自强, 岳雪兰, 霍登平. 兵器材料科学与工程, 1998; 21: 3)[20] Gastien R, Corbellani C E, Alvarez Villar H N, Sade M, Lovely F C. Mater Sci Eng, 2003; A349: 191[21] Chen G L, Lin J P. Basis of Physical Metallurgy of Ordered Intermetallic Compound Materials. Beijing: Metallurgy Industry Press, 1999: 251(陈国良, 林均品. 有序金属间化合物结构材料物理金属学基础. 北京: 冶金工业出版社, 1999: 251)[22] Lovey F C, Torra V. Prog Mater Sci, 1999; 44: 189[23] Hua K F. Micro–theories of Metal Mechanical Properties. Beijing: Science Press, 1983: 158(哈宽富. 金属力学性质的微观理论. 北京: 科学出版社, 1983: 158) |
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