Effects of Stacking Fault Energy and Deformation Temperature on Microstructures and Mechanical Properties of Cu and Cu-Al-Zn Alloys During Rolling

摘要：

　　Cu, Cu-2.5 at % Al-2.5 at % Zn and Cu-12.1 at.% Al-4.1 at % Zn with stac king fault energies (SFEs) of 78, 40 and 7mJ/m2 re spectively were processed by liquid nitrogen temper ature (LNT) rolling and room temperature (RT) rolling.Tensile tests at room temperature indicated that as the stacking fault energy decreased, the strength and ductility increased, and at a constant SFE, the samples deformed via cold-rolling (CR) at liquid nitrogen temperature (77 K) exhibited higher strength and better ductility than those de formed via rolling at room temperature (293 K).With lowering SFE, the crystallite size decreased while the microstrain, dislocation density and twin density all increased.The results indicate that de creasing stacking fault energy is an optimum method to improve the ductility without loss of strength, and the temperature plays a key role in the rolling process.

关键词： Cu-Al-Zn alloys deformation temperature mechanical properties rolling stacking fault energy

作者: Baozhuang Cai Shiying Ren Shitong Zhou Peng Li Weiwei Lv Jingmei Tao Xinkun Zhu

作者单位: Faculty of Materials Science and Engineering,Kunming University of Science and Technology,Kunming,Yunnan 650093,China

会议类型: 国际会议

会议名称: The 12th China-Russia Symposium on Advanced Materials and Technologies(第十二届中俄双边新材料新工艺国际会议)

会议地点: 昆明

会议语种:英文

页码: 31-37

在线出版日期: 2013-11-19（万方平台首次上网日期，不代表论文的发表时间）