Observations of fatigue crack growth in smooth specimens under biaxial loading are reviewed, with particular reference to the Stage I to Stage II and Stage II to Stage I transitions. Further results are presented for 1% Cr‐Mo‐V steel and AISI 316 stainless steel at various temperatures, showing that all cracks may be classed as either Stage I or Stage II. Predictive criteria are suggested for the typè of crack obtained, and the mechanisms for elevated temperature crack initiation are discussed.
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Brown et al. (1979) studied this question.
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