Strain aging of steel 65G strengthened by thermomechanical treatment

Soviet progress in thermomechanical treatment of metals

“…HT1'T4T followed by strain aging has been used to further harden the ternpered martensite or lower bainite (produced by HTNT and isothermal decoinposition) with only a small loss in ductility (39). The low levels of cold deformation during strain aging increases the dislocation density, without forming microcracks.…”