Fatigue life and plastic deformation behavior of electrodeposited copper thin films

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Using a commercial, electrodeposited copper film of 12 mu m thickness, tensile tests, fatigue tests and static loading tests were performed. The elastic modulus, two types of yield strengths, tensile strength and strain-hardening exponent were obtained. Fatigue tests were performed at four levels of mean stresses and cyclic plastic strain and ratcheting strain (monotonic plastic strain) were measured continuously during the tests. Irrespective of mean stress, fatigue life can be well represented by the maximum stress. The monotonic plastic strain at fracture is nearly constant, irrespective of fatigue life or mean stress. Based on the results obtained, the reason why fatigue life can be well represented by the maximum stress is discussed. (C) 2010 Elsevier B.V. All rights reserved.
Publisher
ELSEVIER SCIENCE SA
Issue Date
2010-04
Language
English
Article Type
Article
Keywords

MECHANICAL-PROPERTIES; YOUNGS MODULUS; CYCLE FATIGUE; TENSILE; FRACTURE; POLYSILICON; STRAIN; FOILS; AG

Citation

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, v.527, no.9, pp.2222 - 2232

ISSN
0921-5093
DOI
10.1016/j.msea.2010.01.016
URI
http://hdl.handle.net/10203/96907
Appears in Collection
ME-Journal Papers(저널논문)
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