A comparative study of laser metal deposited and forged Ti-6Al-4V alloy: Uniaxial mechanical response and vibration fatigue properties

Sihan Zhao; Kangbo Yuan; Weiguo Guo; Yan He; Yuheng Xu; Xin Lin

doi:10.1016/j.ijfatigue.2020.105629

A comparative study of laser metal deposited and forged Ti-6Al-4V alloy: Uniaxial mechanical response and vibration fatigue properties

Sihan Zhao, Kangbo Yuan, Weiguo Guo, Yan He, Yuheng Xu, Xin Lin

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

33 Scopus citations

Abstract

This paper conducts a comparative study on mechanical properties of LMD and forged Ti-6Al-4V, focusing on uniaxial compression, tension and shear response with different strain rates, and vibration fatigue behaviors with 45–50 Hz in frequency. The micro-observation on initial microstructures and fractures explains the mechanism of lower uniaxial strength, shorter fatigue life, and larger dispersion in fatigue life and fracture position of LMD sample compared with the forged counterpart. Initial void defects within LMD sample tend to be stress-concentration zone, further initiating fatigue cracks. The columnar β grains leads to anisotropy of fatigue life and crack propagation for LMD sample.

Original language	English
Article number	105629
Journal	International Journal of Fatigue
Volume	136
DOIs	https://doi.org/10.1016/j.ijfatigue.2020.105629
State	Published - Jul 2020

Keywords

Fracture analysis
Initial defect
Laser metal deposition
Ti-6Al-4V
Vibration fatigue

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10.1016/j.ijfatigue.2020.105629

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title = "A comparative study of laser metal deposited and forged Ti-6Al-4V alloy: Uniaxial mechanical response and vibration fatigue properties",

abstract = "This paper conducts a comparative study on mechanical properties of LMD and forged Ti-6Al-4V, focusing on uniaxial compression, tension and shear response with different strain rates, and vibration fatigue behaviors with 45–50 Hz in frequency. The micro-observation on initial microstructures and fractures explains the mechanism of lower uniaxial strength, shorter fatigue life, and larger dispersion in fatigue life and fracture position of LMD sample compared with the forged counterpart. Initial void defects within LMD sample tend to be stress-concentration zone, further initiating fatigue cracks. The columnar β grains leads to anisotropy of fatigue life and crack propagation for LMD sample.",

keywords = "Fracture analysis, Initial defect, Laser metal deposition, Ti-6Al-4V, Vibration fatigue",

author = "Sihan Zhao and Kangbo Yuan and Weiguo Guo and Yan He and Yuheng Xu and Xin Lin",

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year = "2020",

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T1 - A comparative study of laser metal deposited and forged Ti-6Al-4V alloy

T2 - Uniaxial mechanical response and vibration fatigue properties

AU - Zhao, Sihan

AU - Yuan, Kangbo

AU - Guo, Weiguo

AU - He, Yan

AU - Xu, Yuheng

AU - Lin, Xin

PY - 2020/7

Y1 - 2020/7

N2 - This paper conducts a comparative study on mechanical properties of LMD and forged Ti-6Al-4V, focusing on uniaxial compression, tension and shear response with different strain rates, and vibration fatigue behaviors with 45–50 Hz in frequency. The micro-observation on initial microstructures and fractures explains the mechanism of lower uniaxial strength, shorter fatigue life, and larger dispersion in fatigue life and fracture position of LMD sample compared with the forged counterpart. Initial void defects within LMD sample tend to be stress-concentration zone, further initiating fatigue cracks. The columnar β grains leads to anisotropy of fatigue life and crack propagation for LMD sample.

AB - This paper conducts a comparative study on mechanical properties of LMD and forged Ti-6Al-4V, focusing on uniaxial compression, tension and shear response with different strain rates, and vibration fatigue behaviors with 45–50 Hz in frequency. The micro-observation on initial microstructures and fractures explains the mechanism of lower uniaxial strength, shorter fatigue life, and larger dispersion in fatigue life and fracture position of LMD sample compared with the forged counterpart. Initial void defects within LMD sample tend to be stress-concentration zone, further initiating fatigue cracks. The columnar β grains leads to anisotropy of fatigue life and crack propagation for LMD sample.

KW - Fracture analysis

KW - Initial defect

KW - Laser metal deposition

KW - Ti-6Al-4V

KW - Vibration fatigue

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DO - 10.1016/j.ijfatigue.2020.105629

M3 - 文章

AN - SCOPUS:85082672453

SN - 0142-1123

VL - 136

JO - International Journal of Fatigue

JF - International Journal of Fatigue

M1 - 105629

ER -

A comparative study of laser metal deposited and forged Ti-6Al-4V alloy: Uniaxial mechanical response and vibration fatigue properties

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