Multi-length scale modeling of carburization, martensitic microstructure evolution and fatigue properties of steel gears

Edward Charles Henry Crawford O’ Brien, Hemantha Kumar Yeddu

Table 1 Experimental data of stress (S) (in MPa) and the number of cycles to failure (Nf) used in fatigue analysis of uncarburized [43] and carburized [25] gear with 0.9 mm case depth using Ansys.

Uncarburized Carburized S Nf S Nf 425 11818 850 1 ×106 396 17150 900 3.5 ×105 365 46349 1000 7.5 ×104 327 129619 1100 1.9 ×104 300 294496 1100 8.7 ×104 279 449772 1200 4.8 ×103 262 733053 1300 1.5 ×103