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. 9    No. 4    December 1999

[PDF Download]    [Flash Online]

    

In-situ straining observation on crack initiation and growth in an intermetallic Al67Mn8Ti25alloy
Wen Jiuba(文九巴); Rong Yonghua(戎咏华); Chen Shipu(陈世朴); Hu Gengxiang(胡赓祥)

School of Materials Science and Engineering; Shanghai Jiao Tong University; Shanghai 200030; P. R. China

Abstract:In-situ straining SEM observations of an intermetallic Al_67Mn_8Ti_25 alloy were carried out on sheet specimens containing notch with root radius about 100μm. The results show that the crack initiation occurs at notch root along grain boundary, and it grows very rapidly in transgranular manner. During the crack growing, some crack branches and segments are formed. Occasionally when the crack propagates in the direction close to grain boundary, it grows intergranularly along a part of boundary. The observed crack propagation process indicates that the alloy is very brittle at ambient temperatures.

 

Key words:  Al_3Ti alloys; in-situ observation; crack propagation

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