Effects of LWR coolant environments on fatigue lives of austenitic stainless steels

  • Chopra O
  • Gavenda D
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Abstract

Fatigue tests have been conducted on Types 304 and 316NG stainless steels to evaluate the effects of various material and loading variables, e.g.,, steel type, strain rare, dissolved oxygen (DO) in water, and strain range, on the fatigue lives of these steels, The results confirm significant decreases in fatigue life in water: Unlike the situation with ferritic steels, environmental effects on Types 304 and 316NG stainless steel are more pronounced in low-DO than in high-DO water. Experimental results have been compared with estimates of fatigue life based on a statistical model. The formation and growth of fatigue clacks in air and water environments are discussed.

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Authors

  • Omesh K Chopra

  • D J Gavenda

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