Effect of prior strain on serrated yielding of materials at 4.2 K

Results are considered of an experimental study of the combined effect of various factors (prior strain, loading system stiffness, and strain rate) on features of low-temperature serrated yielding of austenitic steels 03Kh20N16AG6 and 12Kh18N10T. It is shown that with high (quasistatic) loading rates r quite high accumulated elastic energy the presence of prior strain causes a quite sharp reduction in material strain resistance. This effect should be considered in evaluating the operating capacity of the rod structural elements under low-temperature conditions.Translated from Problemy Prochnosti, No. 8, pp. 12–20, August, 1995.