Planar slip-driven fatigue crack initiation and propagation in an equiatomic CrMnFeCoNi high-entropy alloy

Kai Suzuki; Motomochi Koyama; Shigeru Hamada; Kaneaki Tsuzaki; Hiroshi Noguchi

doi:10.1016/j.ijfatigue.2019.105418

Planar slip-driven fatigue crack initiation and propagation in an equiatomic CrMnFeCoNi high-entropy alloy

Kai Suzuki, Motomochi Koyama, Shigeru Hamada, Kaneaki Tsuzaki, Hiroshi Noguchi

Strength of materials

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

7 Citations (Scopus)

Abstract

High-cycle fatigue crack initiation and propagation in an equiatomic CrMnFeCoNi high-entropy alloy were investigated using smooth specimens. The microstructural deformation characteristics, i.e., planar dislocation slip, significantly affected the fatigue crack initiation and small fatigue crack propagation. The deformation localization associated with dislocation planarity led to multiple crack initiation on the slip planes. The crack propagation mechanism comprised crack formation on slip planes around the main crack tip and subsequent coalescence. The fatigue crack propagation mechanism shifted to Mode I type as the crack length increased.

Original language	English
Article number	105418
Journal	International Journal of Fatigue
Volume	133
DOIs	https://doi.org/10.1016/j.ijfatigue.2019.105418
Publication status	Published - Apr 2020

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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abstract = "High-cycle fatigue crack initiation and propagation in an equiatomic CrMnFeCoNi high-entropy alloy were investigated using smooth specimens. The microstructural deformation characteristics, i.e., planar dislocation slip, significantly affected the fatigue crack initiation and small fatigue crack propagation. The deformation localization associated with dislocation planarity led to multiple crack initiation on the slip planes. The crack propagation mechanism comprised crack formation on slip planes around the main crack tip and subsequent coalescence. The fatigue crack propagation mechanism shifted to Mode I type as the crack length increased.",

author = "Kai Suzuki and Motomochi Koyama and Shigeru Hamada and Kaneaki Tsuzaki and Hiroshi Noguchi",

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AU - Suzuki, Kai

AU - Koyama, Motomochi

AU - Hamada, Shigeru

AU - Tsuzaki, Kaneaki

AU - Noguchi, Hiroshi

PY - 2020/4

Y1 - 2020/4

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AB - High-cycle fatigue crack initiation and propagation in an equiatomic CrMnFeCoNi high-entropy alloy were investigated using smooth specimens. The microstructural deformation characteristics, i.e., planar dislocation slip, significantly affected the fatigue crack initiation and small fatigue crack propagation. The deformation localization associated with dislocation planarity led to multiple crack initiation on the slip planes. The crack propagation mechanism comprised crack formation on slip planes around the main crack tip and subsequent coalescence. The fatigue crack propagation mechanism shifted to Mode I type as the crack length increased.

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