Deformation in fatigue crack tip plastic zone and its role in crack propagation of titanium alloy with tri-modal microstructure

P. F. Gao; Z. N. Lei; X. X. Wang; M. Zhan

doi:10.1016/j.msea.2018.10.049

Deformation in fatigue crack tip plastic zone and its role in crack propagation of titanium alloy with tri-modal microstructure

P. F. Gao, Z. N. Lei, X. X. Wang, M. Zhan

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

41 Scopus citations

Abstract

A combination of scanning electron microscopy and electron backscatter diffraction is used to investigate the deformation in the fatigue crack tip plastic zone and its role in the crack propagation of Ti-6Al-2Zr-1Mo-1V alloy with a tri-modal microstructure. The results show that heterogenous slip and secondary micro-cracks are the main features of the fatigue crack tip plastic zone. These features play important roles in fatigue crack propagation. In particular, the unique lamellar α in the tri-modal microstructure can deflect and delay the crack propagation effectively, thus, improving the fatigue life.

Original language	English
Pages (from-to)	198-202
Number of pages	5
Journal	Materials Science and Engineering: A
Volume	739
DOIs	https://doi.org/10.1016/j.msea.2018.10.049
State	Published - 2 Jan 2019

Keywords

Crack tip plastic zone
Fatigue crack propagation
Titanium alloy
Tri-modal microstructure

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10.1016/j.msea.2018.10.049

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title = "Deformation in fatigue crack tip plastic zone and its role in crack propagation of titanium alloy with tri-modal microstructure",

abstract = "A combination of scanning electron microscopy and electron backscatter diffraction is used to investigate the deformation in the fatigue crack tip plastic zone and its role in the crack propagation of Ti-6Al-2Zr-1Mo-1V alloy with a tri-modal microstructure. The results show that heterogenous slip and secondary micro-cracks are the main features of the fatigue crack tip plastic zone. These features play important roles in fatigue crack propagation. In particular, the unique lamellar α in the tri-modal microstructure can deflect and delay the crack propagation effectively, thus, improving the fatigue life.",

keywords = "Crack tip plastic zone, Fatigue crack propagation, Titanium alloy, Tri-modal microstructure",

author = "Gao, {P. F.} and Lei, {Z. N.} and Wang, {X. X.} and M. Zhan",

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doi = "10.1016/j.msea.2018.10.049",

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T1 - Deformation in fatigue crack tip plastic zone and its role in crack propagation of titanium alloy with tri-modal microstructure

AU - Gao, P. F.

AU - Lei, Z. N.

AU - Wang, X. X.

AU - Zhan, M.

PY - 2019/1/2

Y1 - 2019/1/2

N2 - A combination of scanning electron microscopy and electron backscatter diffraction is used to investigate the deformation in the fatigue crack tip plastic zone and its role in the crack propagation of Ti-6Al-2Zr-1Mo-1V alloy with a tri-modal microstructure. The results show that heterogenous slip and secondary micro-cracks are the main features of the fatigue crack tip plastic zone. These features play important roles in fatigue crack propagation. In particular, the unique lamellar α in the tri-modal microstructure can deflect and delay the crack propagation effectively, thus, improving the fatigue life.

AB - A combination of scanning electron microscopy and electron backscatter diffraction is used to investigate the deformation in the fatigue crack tip plastic zone and its role in the crack propagation of Ti-6Al-2Zr-1Mo-1V alloy with a tri-modal microstructure. The results show that heterogenous slip and secondary micro-cracks are the main features of the fatigue crack tip plastic zone. These features play important roles in fatigue crack propagation. In particular, the unique lamellar α in the tri-modal microstructure can deflect and delay the crack propagation effectively, thus, improving the fatigue life.

KW - Crack tip plastic zone

KW - Fatigue crack propagation

KW - Titanium alloy

KW - Tri-modal microstructure

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DO - 10.1016/j.msea.2018.10.049

M3 - 文章

AN - SCOPUS:85054915528

SN - 0921-5093

VL - 739

SP - 198

EP - 202

JO - Materials Science and Engineering: A

JF - Materials Science and Engineering: A

ER -

Deformation in fatigue crack tip plastic zone and its role in crack propagation of titanium alloy with tri-modal microstructure

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Keywords

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