Observation of fretting fatigue cracks of Ti6Al4V titanium alloy

Zhiyan Li; Xiaolong Liu; Guoqing Wu; Wei Sha

doi:10.1016/j.msea.2017.09.005

Observation of fretting fatigue cracks of Ti6Al4V titanium alloy

Zhiyan Li, Xiaolong Liu, Guoqing Wu, Wei Sha

School of Natural and Built Environment

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Abstract

Using a test system developed in laboratory, the fretting fatigue mechanism of Ti6Al4V alloy has been studied, with analyses of fracture morphology and composition. The results show that fretting fatigue source area is semi-elliptical and occupies a small proportion of the total fracture surface. The area is relatively flat and smooth and shows traces of friction. With the increase of contact pressure, the depth of the source region first increases rapidly and then stabilizes, but the fatigue strength decreases rapidly and then stabilizes. Fretting causes severe oxidation of the surface. In the interface between the source and the fatigue propagation zone, the contents of O and Fe drop sharply.

Original language	English
Pages (from-to)	51-57
Journal	Materials Science and Engineering: A
Volume	707
Early online date	06 Sep 2017
DOIs	https://doi.org/10.1016/j.msea.2017.09.005
Publication status	Published - 07 Nov 2017

Keywords

Fracture mechanics/fracture behaviour/fatigue
Titanium alloys
Electron microscopy
Grains and interfaces
Characterization

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Cite this

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title = "Observation of fretting fatigue cracks of Ti6Al4V titanium alloy",

abstract = "Using a test system developed in laboratory, the fretting fatigue mechanism of Ti6Al4V alloy has been studied, with analyses of fracture morphology and composition. The results show that fretting fatigue source area is semi-elliptical and occupies a small proportion of the total fracture surface. The area is relatively flat and smooth and shows traces of friction. With the increase of contact pressure, the depth of the source region first increases rapidly and then stabilizes, but the fatigue strength decreases rapidly and then stabilizes. Fretting causes severe oxidation of the surface. In the interface between the source and the fatigue propagation zone, the contents of O and Fe drop sharply.",

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author = "Zhiyan Li and Xiaolong Liu and Guoqing Wu and Wei Sha",

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doi = "10.1016/j.msea.2017.09.005",

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journal = "Materials Science and Engineering: A",

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T1 - Observation of fretting fatigue cracks of Ti6Al4V titanium alloy

AU - Li, Zhiyan

AU - Liu, Xiaolong

AU - Wu, Guoqing

AU - Sha, Wei

PY - 2017/11/7

Y1 - 2017/11/7

N2 - Using a test system developed in laboratory, the fretting fatigue mechanism of Ti6Al4V alloy has been studied, with analyses of fracture morphology and composition. The results show that fretting fatigue source area is semi-elliptical and occupies a small proportion of the total fracture surface. The area is relatively flat and smooth and shows traces of friction. With the increase of contact pressure, the depth of the source region first increases rapidly and then stabilizes, but the fatigue strength decreases rapidly and then stabilizes. Fretting causes severe oxidation of the surface. In the interface between the source and the fatigue propagation zone, the contents of O and Fe drop sharply.

AB - Using a test system developed in laboratory, the fretting fatigue mechanism of Ti6Al4V alloy has been studied, with analyses of fracture morphology and composition. The results show that fretting fatigue source area is semi-elliptical and occupies a small proportion of the total fracture surface. The area is relatively flat and smooth and shows traces of friction. With the increase of contact pressure, the depth of the source region first increases rapidly and then stabilizes, but the fatigue strength decreases rapidly and then stabilizes. Fretting causes severe oxidation of the surface. In the interface between the source and the fatigue propagation zone, the contents of O and Fe drop sharply.

KW - Fracture mechanics/fracture behaviour/fatigue

KW - Titanium alloys

KW - Electron microscopy

KW - Grains and interfaces

KW - Characterization

U2 - 10.1016/j.msea.2017.09.005

DO - 10.1016/j.msea.2017.09.005

M3 - Article

VL - 707

SP - 51

EP - 57

JO - Materials Science and Engineering: A

JF - Materials Science and Engineering: A

SN - 0921-5093

ER -

Observation of fretting fatigue cracks of Ti6Al4V titanium alloy

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Keywords

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