您目前所在的位置:首页 - 期刊简介 - 详细页面

铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 11    No. 5    October 2001

[PDF Download]    [Flash Online]

    

Relaxation of residual stresses in
20%SiCw/6061Al composite
as-extruded at high temperature
JIANG Chuan-hai(姜传海)1,WU Jian-sheng(吴建生)1, WANG De-zun(王德尊)2

1. Key Laboratory for High Temperature Materials and Tests of Ministry of Education,
Shanghai Jiaotong University, Shanghai 200030, P.R.China;
2. School of Materials Science and Engineering,
Harbin Institute of Technology, Harbin 15000, P.R.China

Abstract:  The residual stress in a 20%SiCw/6061Al composite as-extruded was investigated by using X-ray stress measurement method. It was found that, high residual stress existed in the composite and residual stress distribution in each direction are not uniform. Relaxation process of residual stress in the composite was dynamically measured during annealing at high temperature. It is verified that the relaxation of residual stress obeys the power law at high temperature. With the creep mechanism, the relaxation behavior of residual stresses at high temperature was analyzed. The results show that, the stress exponent and activation energy for stress relaxation of the composite are obviously higher than those of the matrix alloy.

 

Key words:  SiCwhisker; Al-matrix composite; residual stress; stress relaxation; X-ray diffraction

ISSN 1672-7029
CN 43-1423/U

主管:中华人民共和国教育部 主办:中南大学 中国铁道学会 承办:中南大学
湘ICP备09001153号 版权所有:《铁道科学与工程学报》编辑部
------------------------------------------------------------------------------------------
地 址:湖南省长沙市韶山南路22号 邮编:410075
电 话:0731-82655133,82656174   传真:0731-82655133   电子邮箱:jrse@mail.csu.edu.cn