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题名: The effect of phase transformation in the plastic zone on the hydrogen-assisted fatigue crack growth of 301 stainless steel
作者: T.C. Chen
S.T. Chen
W. Kai
L.W. Tsay
贡献者: 國立臺灣海洋大學:光電與材料科技學系
关键词: Stainless steel
Fatigue crack growth rate
Hydrogen embrittlement
Martensite
日期: 2016-02
上传时间: 2018-08-14T08:12:20Z
出版者: Materials Characterization
摘要: Abstract: The effects of rolling and stress ratio (R) on the fatigue crack growth rates (FCGRs) of AISI 301 stainless steel (SS) in gaseous hydrogen were investigated. Accelerated fatigue crack growth occurred for the solution-annealed (SA) and cold rolled (CR) specimens tested in gaseous hydrogen, and especially for the CR specimen at high R. Moreover, a sufficiently high ΔK and/or Kmax were required to activate hydrogen-assisted fatigue crack growth of the 301 SS. Fatigue crack growth within a narrow α′ martensite layer was responsible for the rapid FCGRs of the specimens in hydrogen. The plastic zone size, identified by hardness distributions, was much larger than the region that underwent phase transformation.
關聯: 112 pp.134-141
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/48156
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