| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5015128 | International Journal of Fatigue | 2017 | 33 Pages |
Abstract
The effect of austenitization time on the fatigue crack resistance of transformation-induced plasticity (TRIP)-maraging steel was investigated by observing the crack initiation site, propagation path and fracture surface. Our analyses show that austenitization for a longer time increases austenite/martensite lamella size and connectivity of austenite. Simultaneously, increasing lamella size leads to a reduction in austenite hardness; higher austenite connectivity accelerates crack propagation. In addition, remarkable roughness on the crack surface associated with the laminated structure was observed in both steels, which caused roughness-induced crack closure.
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Authors
Z. Zhang, M. Koyama, M.M. Wang, K. Tsuzaki, C.C. Tasan, H. Noguchi,