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. 13    No. 2    April 2003

[PDF Download]    [Flash Online]

    

Negative creep during compressive creep of
 as-cast ZA27 alloy
WEI Xiao-wei(魏晓伟)1, 2, SHEN Bao-luo(沈保罗)1, YI Yong(易 勇)1

1. Department of Metal Materials, 
Sichuan University, Chengdu 610065, China; 
2. Department of Materials Science and Engineering,
Sichuan Institute of Technology, Chengdu 610039, China

Abstract:The negative creep during compressive creep deformation of as-cast ZA27 alloy was investigated at the temperature range of 20-160℃ and at compressive stress levels from 50-137.5MPa with special apparatus. Results show that the negative creep in the alloy occurred respectively at 20℃(50MPa, 87.5MPa and 100MPa), 60℃(50MPa and 87.5MPa) and 100℃(50MPa). According to the phase transformation and theoretical analysis, the negative creep resulted from volume expansion caused by four-phase transformation α+εT+η in the alloy. The theoretical analysis is consistent with the experiment results. And the values of negative creep depended on the difference between the compressive creep deformation and the volume expansion.
附件: yw2003-02-24

 

Key words: ZA27 alloy; compressive creep; negative creep; four-phase transformation

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