Effective stress–strain response of ausformed AISI 9310 steel carburised to 1%C

Abstract

In order to model the ausrolling process using a finite element code, it is necessary to characterise the stress–strain behaviour of metastable austenite at the processing temperature of 232°C in AISI 9310 steel carburised to 1%. True stress versus true strain plots were used to determine the constants in the Hollomon equation σ_t = Kε_tⁿ. In this study, the strength coefficient K, for both the warm ferrite and the metastable austenite was measured as 2·1 GN m⁻². The strain hardening exponents n of the warm ferrite and of the metastable austenite were 0·239 and 0·359 respectively. The ausformed alloy also showed an improved hardness of 1014 HV (300 g) compared with that of 760 HV (300 g) for the marquenched alloy.

MST/1958