| Title |
Effect of Non - Metallic Inclusions on the Fatigue bahavior in High C - Cr Bearing Steel |
| Authors |
윤복용(Bock Yong Yoon); 최병영(Byung Young Choi) |
| Abstract |
The effect of type, size and quantity of non-metalic inclusions on the fatigue behavior of high C-Cr bearing steel during thrust-type rolling contact fatigue have been investigated. It was observed that elongated MnS inclusions, fragmented stringers of angular Al₂O₃inclusions and AI₂O₃-MnS duplex inclusions were distributed along the direction of working. ASTM A 295-84 SAM method was more suitable for assessing non- metallic inclusions to estimate fatigue life of high C-Cr bearing steel than Fairey method. Fatigue life decreased with the content of Al₂O₃inclusions. It was also observed in the region below flaking that fatigue crack was initiated by debonding of large AI₂O₃inclusion from matrix whereas void formed around small Al₂O₃inclusion |