摘要
Cu经过等径角挤压（ECAP）变形后,屈服强度达到了约400 MPa,然而加工硬化能力不足导致其在小应变阶段就开始颈缩（≤2%）。研究发现,可以通过部分再结晶退火调控变形Cu的室温准静态拉伸性能。在275℃退火10 min后,其准静态拉伸强度和塑性得到了良好的匹配：在保持屈服强度为330 MPa的前提下,均匀伸长率达5%。
After equal channel angular pressing（ ECAP） deformation,Cu obtains yield stress up to about 400 MPa in quasi-static tensile test,however,its insufficient strain hardening ability leads to necking after plastic deformation of only ≤2%. It is found that the quasi-static tensile properties at room temperature of the deformed Cu can be adjusted and controled by partial recrystallization annealing. After annealing at 275 ℃ for 10 min,the strength and ductility matches well,i. e.,a yield stress of 330 MPa can be kept with a uniform elongation of 5%.
作者
刘志华
武晓雷
韩培德
Liu Zhihua1,2,3, Wu Xiaolei2,3, Han Peide 1(1. College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan Shanxi 030024, China ; 2. State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China; 3. School of Engineering Science, University of Chinese Academy of Sciences, Beijing 100049, Chin)
出处
《金属热处理》
CAS
CSCD
北大核心
2018年第3期120-123,共4页
Heat Treatment of Metals
基金
国家自然科学基金51371123
关键词
ECAP
热处理
力学性能
强塑匹配
ECAP
heat treatment
mechanical properties
strength-ductility match
