Comprehensive Investigations of Fracture and Fatigue Properties for 10CrNi3MoV Steel at Low Temperatures

ABSTRACT Basic mechanical and low‐cycle fatigue (LCF) properties of 10CrNi3MoV steel were comprehensively examined by experimental tests at low temperatures in the paper. The variations of yield, tensile strength, and impact values were presented to show their variation tendency. Furthermore, the LCF tests were conducted, and some fatigue indicators under strain‐controlled loadings, such as hysteresis loops, cyclic Masing behavior, and fatigue capacity were characterized. Fatigue crack growth (FCG) tests quantitatively revealed the factors of stress ratio and temperature on the FCG resistances. Results show that the decrease of temperature also improves the capacity of basic mechanical properties, crack initiation, and crack growth of the steel, while the impact properties will deteriorate with variation of temperature. The ductile and brittle fracture transition (DBT) behaviors under different loading conditions were also examined. Results demonstrate that the DBT behavior for LCF properties is consistent with that of FCG performance at low temperatures.