Observations of plastic strain rate continuity in iron in and near the “athermal plateau”

摘要: Abstract The nature of dislocation slip in interstitial free Ti-gettered iron and type 304 stainless steel has been examined through tests for plastic strain rate continuity based on load relaxation experiments. Measurements have made at temperatures from 77 to 773 K as a function the degree hardening. results pure demonstrate that is continuous during an abrupt change imposed stress under all conditions which were studied. These observations indicate motion depends only stress, temperature internal structure. We conclude thermally activated process, mechanical activation not observed these are unchanged range exhibits so-called athermal plateau yield versus temperature. present findings it appropriate associate this with level stress. Similar suggest impurities alloy act thermal obstacles motion.