Environmental Fatigue of 7075-T6 Aluminum Alloy

被引：1

作者：

Ebara, R. ^{[1
]}

McEvily, A. J. ^{[2
]}

机构：

[1] Hiroshima Inst Technol, Dept Mech Syst Engn, Saeki Ku, 2-1-1 Miyake, Hiroshima 7315193, Japan

[2] Univ Connecticut, Dept Metallurgy & Mat Engn, Storrs, CT 06269 USA

来源：

ADVANCES IN FRACTURE AND DAMAGE MECHANICS IX | 2011年 / 452-453卷

关键词：

Fatigue life; Aluminum alloy; Vacuum; Relative Humidity; Fatigue crack initiation; Fatigue crack propagation; Striation; ATMOSPHERIC HUMIDITY; CRACK PROPAGATION; ULTRAHIGH VACUUM; AIR;

D O I：

10.4028/www.scientific.net/KEM.452-453.13

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The fatigue lifetime of the aluminum alloy 7075-6 depends upon the cyclic stress amplitude and the environment. At an R value of 0.05, and a maximum stress of 400 MPa the lifetime in vacuum is an order of magnitude greater than that in air, but interestingly at a maximum stress of 275 MPa, the lifetime in vacuum is only three times that in air. It was noted that well defined striations were observed in air, whereas striations were absent in vacuum, instead indications of ductile rupture were observed. The mechanism of fatigue crack initiation and propagation behavior as influenced by the environment is discussed.

引用

页码：13 / +

页数：2

共 12 条

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