Low temperature fatigue fracture of metals and alloys

Study on fatigue failure mechanism at various temperatures of a high-speed railway wheel steel

“…9 (g) and (h) demonstrate the fracture surface morphology of stage II of both the wheel rim and the wheel web, respectively. The 10 fatigue striations were observed on the fracture surface of the wheel web, whereas a higher number of intergranular cracks were discovered in the wheel rim.…”

“…According to Zhu et al [6], as the testing temperature increased, the TEM images displayed that a higher number of both dislocations lines and dislocation cells existed within the ferrite structure and the pearlite phase interface, whereas a higher amount of microscopic plastic strain was evident in the internal structure of the cells; The EBSD maps demonstrated that both the sub-grains, generated at the high-angle boundary, and the retained austenite displayed a certain amount of deformation. Verkin et al [10] also reported that as the testing temperature increased, the fraction of the deformation plasticity component increased at the expense of the elasticity component decrease. On one hand, the cyclic hardening rate increased along with a cumulative plastic strain [10].…”

“…Verkin et al [10] also reported that as the testing temperature increased, the fraction of the deformation plasticity component increased at the expense of the elasticity component decrease. On one hand, the cyclic hardening rate increased along with a cumulative plastic strain [10]. On the other hand, the local plastic strain accelerated the dislocation formation during fatigue, which accelerated the striation formation further [9].…”

“…At a certain temperature below the ductile-brittle transition temperature, the trend reversed due to enhanced cleavage bursts. Verkin et al [10] investigated the effects of low temperatures on both fatigue life and fatigue limit of various crystal lattice types of both metals and alloys.…”

Effect of Cryogenic Temperature on Low-Cycle Fatigue Behavior of AISI 304L Welded Joint

“…In addition, this characteristic in the low-cycle region is similar to that in the high-cycle region. In general, it is well known that the fatigue resistance of structural steels increases at low temperature with an increase of the static strength [6,22]. …”