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. 17    Special 1    November 2007

[PDF Download]    [Flash Online]

    

Fatigue behaviour of pre-strain 7B04-T7451 aluminum alloy
JIANG Feng(姜  锋)1, JIAN Hai-gen(蹇海根)1, YIN Zhi-min(尹志民)1, HE Zhen-bo(何振波)2

1. School of Materials Science and Engineering, Central South University, Changsha 410083, China;
2. Northeast Light Alloy Co Ltd, Harbin 150060, China

Abstract:The effect of minimum and the maximum stresses on the fatigue behaviour of a 30 mm thick plate of a 7B04-T7451 (Al-Zn-Mg-Cu) subjected to a tensile pre-strain level of 2% was investigated, including the fatigue crack growth (FCG) rate, microstructure observation, fractographic examination and fatigue S-N curve, etc. The results show that the characteristics of fatigue facture can be observed obviously under high cycle fatigue condition, and the higher the stress amplitude, the wider the space between fatigue striations, the faster the rate of fatigue crack developing and going into the intermittent fracture and the greater the ratio of the intermittent fracture area to the whole fracture area.

 

Key words: 7B04-T7451 aluminum alloy; high cycle fatigue; fatigue crack growth rate; endurance limit

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