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. 6    No. 4    December 1996

[PDF Download]    [Flash Online]

    

CREEP BEHAVIOR OF AN EASY ORIENTED Ti-48Al PST CRYSTAL
Lin Jianguo, Zhou Yajian, Zhang Yonggang, Chen Changqi

Department of Materials Science and Engineering,Beijing University of Aeronautics and Austronautics, Beijing100083

Abstract:The creep deformation behavior of an easy oriented PST crystal was investigated at 800℃ in compression creep. The stress range was 120MPa to 200MPa. The creep curves showed a steady state stage. The application of a power-law equation led to a stress exponent n=6.6 and the creep activation energy Qc=282 kJ/mol, which indicated that dislocation climb controlls creep mechanism. TEM observation of the crept samples at steady state regime showed the formation of substructures in some γ plates.

 

Key words: TiAl alloy PST crystal creep behavior

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