Abstract
Abstract—The results of high temperature low cycle fatigue (HTLCF) on IN 738, obtained from two different sources, were used to study the applicability of strain‐range partitioning (SRP) to this alloy. In spite of the difficulty in separating the plastic‐plastic strain component from the different strain‐life relations, an attempt was made to determine the coefficients and exponents for each of these relations from both sets of data. The observation that compressive creep, balanced by tensile plastic deformation, was more damaging than the reverse, could be related to the behaviour of the material. The evidence of the effect of temperature on the plastic‐plastic strain‐life relation, reported by some researches, was shown to be not decisive in the reported temperature range. The reasonable agreement and the similarity in the material's behaviour, obtained from the analysis of the high temperature low cycle fatigue of the two sets of data, substantiates the applicability of the strain‐range partitioning method to IN 738 alloy.
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