Fatigue Crack Growth Behavior in Welded Joints of High-Strength Steel under Low Temperatures

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概要

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• Fatigue crack growth rates in the base metal and welds of HT80 steel welded joints were evaluated at temperatures ranging from room temperature down to 93 K. For the welds, the crack growth rates between room temperature and 173 K were dominated by residual stresses rather than temperatures. As temperatures decreased below 123 K, the crack growth rates of the base metal and welds increased markedly because of cyclic cleavage during striation growth. The crack growth rates of the welds were correlated with an effective stress intensity factor range, ΔK_<effR>, which was estimated by superposition of the respective stress intensity factors for the residual stress fields and for the applied stresses when the crack growth was dominated by striation formation.

• 一般社団法人日本機械学会の論文
• 1991-07-15

著者

• Kitsunai Y

  National Inst. Industrial Safety Tokyo Jpn

• KITSUNAI Yoshio

  National Research Institute of Industrial Safety

• YOSHIHISA Etsuji

  National Research Institute of Industrial Safety

関連論文

• Fatigue Crack Growth Behavior in Welded Joints of High-Strength Steel under Low Temperatures

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