Influence of microstructure on strain controlled low cycle fatigue crack initiation and propagation of Ti-55531 alloy

Zilu Xu; Chaowen Huang; Mingpan Wan; Changsheng Tan; Yongqing Zhao; Shengli Ji; Weidong Zeng

doi:10.1016/j.ijfatigue.2021.106678

Influence of microstructure on strain controlled low cycle fatigue crack initiation and propagation of Ti-55531 alloy

Zilu Xu, Chaowen Huang, Mingpan Wan, Changsheng Tan, Yongqing Zhao, Shengli Ji, Weidong Zeng

School of Materials Sience and Engineering

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

25 Scopus citations

Abstract

Low cycle fatigue (LCF) crack initiation and propagation behavior of Ti-55531 alloy with lamellar and bimodal microstructures were comparatively investigated at room temperature. Results indicated that the two microstructures displayed different sensitivity to the change of cyclic strain, which resulted in significantly different cyclic deformation, fatigue crack nucleation, and crack propagation behavior of two microstructures. Finally, it was found that cyclic lives of two microstructures were entirely different. Moreover, besides slips and deformation twins, stacking faults promoting cracking of α_s/β interface may be another important LCF microcrack nucleation mechanism of Ti alloys, which hasn't been revealed by other researchers.

Original language	English
Article number	106678
Journal	International Journal of Fatigue
Volume	156
DOIs	https://doi.org/10.1016/j.ijfatigue.2021.106678
State	Published - Mar 2022

Keywords

Crack initiation
Crack propagation
Low cycle fatigue
Microstructure
Ti-55531 alloy

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10.1016/j.ijfatigue.2021.106678

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title = "Influence of microstructure on strain controlled low cycle fatigue crack initiation and propagation of Ti-55531 alloy",

abstract = "Low cycle fatigue (LCF) crack initiation and propagation behavior of Ti-55531 alloy with lamellar and bimodal microstructures were comparatively investigated at room temperature. Results indicated that the two microstructures displayed different sensitivity to the change of cyclic strain, which resulted in significantly different cyclic deformation, fatigue crack nucleation, and crack propagation behavior of two microstructures. Finally, it was found that cyclic lives of two microstructures were entirely different. Moreover, besides slips and deformation twins, stacking faults promoting cracking of αs/β interface may be another important LCF microcrack nucleation mechanism of Ti alloys, which hasn't been revealed by other researchers.",

keywords = "Crack initiation, Crack propagation, Low cycle fatigue, Microstructure, Ti-55531 alloy",

author = "Zilu Xu and Chaowen Huang and Mingpan Wan and Changsheng Tan and Yongqing Zhao and Shengli Ji and Weidong Zeng",

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year = "2022",

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doi = "10.1016/j.ijfatigue.2021.106678",

language = "英语",

volume = "156",

journal = "International Journal of Fatigue",

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T1 - Influence of microstructure on strain controlled low cycle fatigue crack initiation and propagation of Ti-55531 alloy

AU - Xu, Zilu

AU - Huang, Chaowen

AU - Wan, Mingpan

AU - Tan, Changsheng

AU - Zhao, Yongqing

AU - Ji, Shengli

AU - Zeng, Weidong

PY - 2022/3

Y1 - 2022/3

N2 - Low cycle fatigue (LCF) crack initiation and propagation behavior of Ti-55531 alloy with lamellar and bimodal microstructures were comparatively investigated at room temperature. Results indicated that the two microstructures displayed different sensitivity to the change of cyclic strain, which resulted in significantly different cyclic deformation, fatigue crack nucleation, and crack propagation behavior of two microstructures. Finally, it was found that cyclic lives of two microstructures were entirely different. Moreover, besides slips and deformation twins, stacking faults promoting cracking of αs/β interface may be another important LCF microcrack nucleation mechanism of Ti alloys, which hasn't been revealed by other researchers.

AB - Low cycle fatigue (LCF) crack initiation and propagation behavior of Ti-55531 alloy with lamellar and bimodal microstructures were comparatively investigated at room temperature. Results indicated that the two microstructures displayed different sensitivity to the change of cyclic strain, which resulted in significantly different cyclic deformation, fatigue crack nucleation, and crack propagation behavior of two microstructures. Finally, it was found that cyclic lives of two microstructures were entirely different. Moreover, besides slips and deformation twins, stacking faults promoting cracking of αs/β interface may be another important LCF microcrack nucleation mechanism of Ti alloys, which hasn't been revealed by other researchers.

KW - Crack initiation

KW - Crack propagation

KW - Low cycle fatigue

KW - Microstructure

KW - Ti-55531 alloy

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DO - 10.1016/j.ijfatigue.2021.106678

M3 - 文章

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SN - 0142-1123

VL - 156

JO - International Journal of Fatigue

JF - International Journal of Fatigue

M1 - 106678

ER -

Influence of microstructure on strain controlled low cycle fatigue crack initiation and propagation of Ti-55531 alloy

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Keywords

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