Effects of lamella size and connectivity on fatigue crack resistance of TRIP-maraging steel

Z. Zhang; M. Koyama; M. M. Wang; K. Tsuzaki; C. C. Tasan; H. Noguchi

doi:10.1016/j.ijfatigue.2017.03.040

Effects of lamella size and connectivity on fatigue crack resistance of TRIP-maraging steel

Z. Zhang, M. Koyama, M. M. Wang, K. Tsuzaki, C. C. Tasan, H. Noguchi

Strength of materials

Research output: Contribution to journal › Article › peer-review

20 Citations (Scopus)

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.

Original language	English
Pages (from-to)	176-186
Number of pages	11
Journal	International Journal of Fatigue
Volume	100
DOIs	https://doi.org/10.1016/j.ijfatigue.2017.03.040
Publication status	Published - Jul 1 2017

All Science Journal Classification (ASJC) codes

Modelling and Simulation
Materials Science(all)
Mechanics of Materials
Mechanical Engineering
Industrial and Manufacturing Engineering

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10.1016/j.ijfatigue.2017.03.040

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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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AU - Zhang, Z.

AU - Koyama, M.

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AU - Tsuzaki, K.

AU - Tasan, C. C.

AU - Noguchi, H.

PY - 2017/7/1

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AB - 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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JO - International Journal of Fatigue

JF - International Journal of Fatigue

ER -

Effects of lamella size and connectivity on fatigue crack resistance of TRIP-maraging steel

Abstract

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