Deformation behavior of Cu-12wt%Al alloy wires with continuous columnar crystals in dieless drawing process

作     者：LIU XueFeng WU YuHui XIE JianXin 

作者机构：Key Laboratory of Advanced Processing Technology of Materials of Ministry of EducationUniversity of Science and Technology BeijingBeijing 100083China State Key Laboratory for Advanced Metals and MaterialsUniversity of Science and Technology BeijingBeijing 100083China 

出 版 物：《Science China(Technological Sciences)》 (中国科学（技术科学英文版）)

年 卷 期：2009年第52卷第8期

页      面：2232-2236页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：Supported by the National Basic Research Program of China (Grant No. 2006CB605200) the National High Technology Research and Development Program of China (Grant No. 2006AA03Z506) the National Natural Science Foundation of China (Grant Nos. 50674008 and 50634010) the Program for New Century Excellent Talents in University of China (Grant No. NCET-06-0083) 

主　　题：Cu-Al alloy continuous columnar crystals dieless drawing microstructure and mechanical properties 

摘      要：The microstructure and mechanical properties of Cu-12wt%Al alloy wires which are composed of continuous columnar crystals after dieless drawing forming at drawing speed of 1.0–1.4 mm/s and deformation temperature of 600–900°C were analyzed, and deformation behavior of the alloy during dieless drawing forming was experimentally investigated. The results showed that in the above-mentioned conditions, recrystallization phenomenon was not found during dieless drawing forming. When a drawing speed of 1.0 mm/s was used, the grain boundaries were out of straight gradually with increasing deformation temperature from 600°C to 900°C, and tensile strength of the dieless drawn Cu-12wt%Al alloy wires increased while elongations decreased with increasing deformation temperature. At drawing speed of 1.1–1.2 mm/s and deformation temperature of 600°C, the effect of dieless drawing forming process on the microstructure of the alloy was inconspicuous, and when drawing speed was up to 1.3–1.4 mm/s, the grain boundaries of continuous columnar crystals became zigzag while there was little effect of drawing speed of 1.1–1.4 mm/s on the elongation and tensile strength of the alloy wires.