Effect of deformation rate and gradient on creep and structure of the metal under uni-axial tension

摘要

The investigation results of extension rate effect on features of creep, redistribution of ironings between cylinder part of specimen and neck sections, specimen structure change along the neck are reported. A procedure for determination of specific neck local elongation was developed. It is demonstrated that elongation of the specimen along gauge length and the yield plateau length are invariantly related with the extension rate. It is shown that the change of the deformation rate causes ironings redistribution between cylinder specimen section and neck zone, besides it dictates deformation redistribution between axial and near-surface (lateral) fibre of the specimen.