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Fatigue Lives of a Ferritic Stainless Steel Containing Deformation Twins

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Abstract:

The fatigue properties of ferritic stainless steel containing deformation twins were investigated. Monotonic tensile tests and push-pull fatigue tests were conducted on the specimens both with and without twins. Fatigue lives of the twinned specimens were about four times shorter than those without the deformation twins, although yield stresses of both specimens were almost equal. It was found that the fatigue cracking along the deformation twin boundaries caused the reduction in fatigue life. Dislocation structure observation using the ECCI method revealed that no specific dislocation structure was formed near the cracked deformation twin boundary, although the ladder-like PSB structure was developed along an annealing twin boundary in an austenitic stainless steel.

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Periodical:

Key Engineering Materials (Volumes 353-358)

Pages:

283-286

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.353-358.283

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Online since:

September 2007

Authors:

T. Taniguchi, Yoshihisa Kaneko, Satoshi Hashimoto

Keywords:

Deformation Twin, Dislocation Structure, Electron Channeling Contrast Imaging, Fatigue Crack, Ferritic Stainless Steel (FSS), Twin Boundary

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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