TY - JOUR
T1 - Planar slip-driven fatigue crack initiation and propagation in an equiatomic CrMnFeCoNi high-entropy alloy
AU - Suzuki, Kai
AU - Koyama, Motomichi
AU - Hamada, Shigeru
AU - Tsuzaki, Kaneaki
AU - Noguchi, Hiroshi
N1 - Funding Information:
This work was financially supported by JSPS KAKENHI ( JP16H06365 and JP17H04956 ).
PY - 2020/4
Y1 - 2020/4
N2 - 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.
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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U2 - 10.1016/j.ijfatigue.2019.105418
DO - 10.1016/j.ijfatigue.2019.105418
M3 - Article
AN - SCOPUS:85076186091
VL - 133
JO - International Journal of Fatigue
JF - International Journal of Fatigue
SN - 0142-1123
M1 - 105418
ER -