Influence of Plastic Deformation on the Tensile Properties of 10CrNi3MoV Steel by Instrument Indentation Test

Abstract

Hull steels undergo significant cold deformation and annealing during ship construction processes. However, current non-destructive evaluation techniques lack the capability for on-site assessment of mechanical property variations post-fabrication. This study systematically investigates the effects of plastic deformation and recrystallization annealing on 10CrNi3MoV hull steel through controlled variations in deformation rate and annealing temperature. The mechanical property evolution was quantitatively characterized through both conventional tensile testing and instrumented indentation testing (IIT). Experimental results demonstrate that IIT effectively captures the mechanical property changes induced by plastic deformation and subsequent annealing, thereby enabling non-destructive evaluation of tensile properties in high-strength low-alloy steels. Furthermore, a model was established to characterize the relationship between yield strength and plastic deformation rate, as well as the true stress-strain behavior based on post-deformation tensile properties. This model enables rapid prediction of yield strength and accurate description of the stress-strain relationship after plastic deformation.