The effect of environment on fatigue crack growth behavior of aluminum alloy 5456

Authors
Menzemer, C Srivatsan, TS
Citation
C. Menzemer et Ts. Srivatsan, The effect of environment on fatigue crack growth behavior of aluminum alloy 5456, MAT SCI E A, 271(1-2), 1999, pp. 188-195
Citations number
41
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN journal
09215093 → ACNP
Volume
271
Issue
1-2
Year of publication
1999
Pages
188 - 195
Database
ISI
SICI code
0921-5093(19991101)271:1-2<188:TEOEOF>2.0.ZU;2-8
Abstract
The effect of laboratory air, water vapor and oxygen on fatigue crack propa gation behavior of aluminum alloy 5456 has been investigated over a range o f growth rates spanning five orders of magnitude. Environmental interaction s in the intermediate region are found to be associated with microscopic fr acture features and mechanisms governing degradation. The alloy shows signi ficantly enhanced crack growth rates in the environments of laboratory air and water vapor than in the oxygen environment. Mechanisms contributing to the enhanced crack growth rate are examined and discussed in light of const ituents in the environment, fracture surface features and microstructure. ( C) 1999 Elsevier Science S.A. All rights reserved.