Subsurface Facet-fisheye Induced Failure of Titanium Alloy under Very High Cycle Fatigue

Wei Li; Meng Li; Xinxin Xing; Ning Gao

doi:10.1088/1757-899X/746/1/012017

Subsurface Facet-fisheye Induced Failure of Titanium Alloy under Very High Cycle Fatigue

Wei Li^*, Meng Li, Xinxin Xing, Ning Gao

^*Corresponding author for this work

School of Mechanical Engineering

Research output: Contribution to journal › Conference article › peer-review

Abstract

Very high cycle fatigue test under pulsating tension was performed to investigate the subsurface failure mechanism of a titanium alloy. A peculiar region, called "facets cluster zone (FCZ)", is located at the center of fisheye. The slip-like patterns on facet surface, coalescence of nanoscale cracks and growth of microcracks in the maximum shear stress plane are observable. Combined with the evaluation of stress intensity factors at crack tips, the subsurface failure processes are summarized as: (a) localization of plastic strain, (b) occurrence of slip lines, (c) nucleation of microcracks, (d) coalescence and growth of microcracks, (f) occurrence of the FCZ, (g) formation of fisheye and (i) unstable crack growth until final fracture.

Original language	English
Article number	012017
Journal	IOP Conference Series: Materials Science and Engineering
Volume	746
Issue number	1
DOIs	https://doi.org/10.1088/1757-899X/746/1/012017
Publication status	Published - 4 Mar 2020
Event	2nd Annual International Conference on Mechanical Engineering and Materials, ICMEM 2019 - Guangzhou, China Duration: 20 Dec 2019 → 21 Dec 2019

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10.1088/1757-899X/746/1/012017

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title = "Subsurface Facet-fisheye Induced Failure of Titanium Alloy under Very High Cycle Fatigue",

abstract = "Very high cycle fatigue test under pulsating tension was performed to investigate the subsurface failure mechanism of a titanium alloy. A peculiar region, called {"}facets cluster zone (FCZ){"}, is located at the center of fisheye. The slip-like patterns on facet surface, coalescence of nanoscale cracks and growth of microcracks in the maximum shear stress plane are observable. Combined with the evaluation of stress intensity factors at crack tips, the subsurface failure processes are summarized as: (a) localization of plastic strain, (b) occurrence of slip lines, (c) nucleation of microcracks, (d) coalescence and growth of microcracks, (f) occurrence of the FCZ, (g) formation of fisheye and (i) unstable crack growth until final fracture.",

author = "Wei Li and Meng Li and Xinxin Xing and Ning Gao",

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T1 - Subsurface Facet-fisheye Induced Failure of Titanium Alloy under Very High Cycle Fatigue

AU - Li, Wei

AU - Li, Meng

AU - Xing, Xinxin

AU - Gao, Ning

PY - 2020/3/4

Y1 - 2020/3/4

N2 - Very high cycle fatigue test under pulsating tension was performed to investigate the subsurface failure mechanism of a titanium alloy. A peculiar region, called "facets cluster zone (FCZ)", is located at the center of fisheye. The slip-like patterns on facet surface, coalescence of nanoscale cracks and growth of microcracks in the maximum shear stress plane are observable. Combined with the evaluation of stress intensity factors at crack tips, the subsurface failure processes are summarized as: (a) localization of plastic strain, (b) occurrence of slip lines, (c) nucleation of microcracks, (d) coalescence and growth of microcracks, (f) occurrence of the FCZ, (g) formation of fisheye and (i) unstable crack growth until final fracture.

AB - Very high cycle fatigue test under pulsating tension was performed to investigate the subsurface failure mechanism of a titanium alloy. A peculiar region, called "facets cluster zone (FCZ)", is located at the center of fisheye. The slip-like patterns on facet surface, coalescence of nanoscale cracks and growth of microcracks in the maximum shear stress plane are observable. Combined with the evaluation of stress intensity factors at crack tips, the subsurface failure processes are summarized as: (a) localization of plastic strain, (b) occurrence of slip lines, (c) nucleation of microcracks, (d) coalescence and growth of microcracks, (f) occurrence of the FCZ, (g) formation of fisheye and (i) unstable crack growth until final fracture.

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U2 - 10.1088/1757-899X/746/1/012017

DO - 10.1088/1757-899X/746/1/012017

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AN - SCOPUS:85082114717

SN - 1757-8981

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JO - IOP Conference Series: Materials Science and Engineering

JF - IOP Conference Series: Materials Science and Engineering

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T2 - 2nd Annual International Conference on Mechanical Engineering and Materials, ICMEM 2019

Y2 - 20 December 2019 through 21 December 2019

ER -

Subsurface Facet-fisheye Induced Failure of Titanium Alloy under Very High Cycle Fatigue

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