Characterising and representing small crack growth in an additive manufactured titanium alloy

Muhammad Shamir; Xiang Zhang; Abdul Syed

doi:10.1016/j.engfracmech.2021.107876

Characterising and representing small crack growth in an additive manufactured titanium alloy

Muhammad Shamir, Xiang Zhang, Abdul Syed

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

32 Citations (Scopus)

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Abstract

The purpose of the research is to apply the modified Hartman-Schijve equation for predicting small crack growth rate in additive manufactured titanium Ti-6Al-4V. Material constants in the equation were determined by long crack test data, and the threshold of the stress intensity factor range was set to a small value. A small fatigue crack test was conducted to validate the fitted equation. Predicted fatigue life of another specimen configuration under bending load agreed well with the test result. The work shows that it may be possible to represent both small and long crack growth rates by the modified Hartman-Schijve equation with its material constants being determined by long crack test.

Original language	English
Article number	107876
Number of pages	13
Journal	Engineering Fracture Mechanics
Volume	253
Early online date	10 Jul 2021
DOIs	https://doi.org/10.1016/j.engfracmech.2021.107876
Publication status	Published - Aug 2021

Bibliographical note

Published by Elsevier Ltd. This is an open access article under the CC BY license

Funder

EPSRC

Keywords

small/short cracks
EIDS
surface roughness
durability
fracture mechanics
finite element analysis
WAAM
Ti-6Al-4V

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10.1016/j.engfracmech.2021.107876Licence: CC BY

Post-PrintAccepted author manuscript, 1.3 MBLicence: CC BY-NC-ND
1-s2.0-S0013794421003118-main (1)Final published version, 5.65 MBLicence: CC BY

Cite this

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abstract = "The purpose of the research is to apply the modified Hartman-Schijve equation for predicting small crack growth rate in additive manufactured titanium Ti-6Al-4V. Material constants in the equation were determined by long crack test data, and the threshold of the stress intensity factor range was set to a small value. A small fatigue crack test was conducted to validate the fitted equation. Predicted fatigue life of another specimen configuration under bending load agreed well with the test result. The work shows that it may be possible to represent both small and long crack growth rates by the modified Hartman-Schijve equation with its material constants being determined by long crack test.",

keywords = "small/short cracks, EIDS, surface roughness, durability, fracture mechanics, finite element analysis, WAAM, Ti-6Al-4V",

author = "Muhammad Shamir and Xiang Zhang and Abdul Syed",

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language = "English",

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journal = "Engineering Fracture Mechanics",

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AU - Shamir, Muhammad

AU - Zhang, Xiang

AU - Syed, Abdul

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PY - 2021/8

Y1 - 2021/8

N2 - The purpose of the research is to apply the modified Hartman-Schijve equation for predicting small crack growth rate in additive manufactured titanium Ti-6Al-4V. Material constants in the equation were determined by long crack test data, and the threshold of the stress intensity factor range was set to a small value. A small fatigue crack test was conducted to validate the fitted equation. Predicted fatigue life of another specimen configuration under bending load agreed well with the test result. The work shows that it may be possible to represent both small and long crack growth rates by the modified Hartman-Schijve equation with its material constants being determined by long crack test.

AB - The purpose of the research is to apply the modified Hartman-Schijve equation for predicting small crack growth rate in additive manufactured titanium Ti-6Al-4V. Material constants in the equation were determined by long crack test data, and the threshold of the stress intensity factor range was set to a small value. A small fatigue crack test was conducted to validate the fitted equation. Predicted fatigue life of another specimen configuration under bending load agreed well with the test result. The work shows that it may be possible to represent both small and long crack growth rates by the modified Hartman-Schijve equation with its material constants being determined by long crack test.

KW - small/short cracks

KW - EIDS

KW - surface roughness

KW - durability

KW - fracture mechanics

KW - finite element analysis

KW - WAAM

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DO - 10.1016/j.engfracmech.2021.107876

M3 - Article

SN - 0013-7944

VL - 253

JO - Engineering Fracture Mechanics

JF - Engineering Fracture Mechanics

M1 - 107876

ER -

Characterising and representing small crack growth in an additive manufactured titanium alloy

Abstract

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