Elevated temperature hardening of INCONEL 690

摘要: Abstract The strain hardening response of INCONEL 690 during tensile deformation between 200–1200°C has been examined. At low temperatures, ⩽600°C, two stages hardening, associated with dislocation–dislocation and dislocation–solute interactions were observed. Increasing temperatures to 700°C resulted in the introduction a third stage, transmission electron microscopy suggesting that this additional stage arises because transition dislocation arrangement from random tangles cellular substructure. Finally, 750°C 1200°C single was observed, showing be cellular/sub-grain Analysis these results indicates at 600°C can described by Bodner–Partom (B–P) and/or Kocks–Mecking (K–M) interaction model. Furthermore, 950°C behavior modified K–M dislocation–constant periodic barrier size higher >950°C, model may utilized through inclusion an experimentally determined dependent spacing.