The Influence of Grain Size on Elevated Temperature Deformation Behaviour of a Type 316 Stainless Steel

ABSTRACT The influence of grain size on the tensile deformation behaviour of a type 316 stainless steel has been investigated in the temperature range 500–1223 K. The Hall-Petch relation was found to be valid up to 1023 K. The variation of Hall-Petch constants with strain and temperature has been analysed and found to generally support modified pile-up theories of grain boundary strengthening. The variations of flow stress and work hardening rate with temperature and grain size have been found to be influenced by dynamic strain ageing which occurs in the temperature range 523–923 K.