Fracture toughness and fatigue crack growth rate properties in wire + arc additive manufactured Ti-6Al-4V

Xiang Zhang; F. Martina; J. Ding; X. Wang; S. W. Williams

doi:10.1111/ffe.12547

Fracture toughness and fatigue crack growth rate properties in wire + arc additive manufactured Ti-6Al-4V

Xiang Zhang, F. Martina, J. Ding, X. Wang, S. W. Williams

Cranfield University

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

102 Citations (Scopus)

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Abstract

This paper presents an experimental investigation of the fracture and fatigue crack growth properties of Ti-6Al-4V produced by the Wire + Arc Additive Manufacture (WAAM®) process. First, fracture toughness was measured for two different orientations with respect to the build direction; the effect of wire oxygen content and build strategy were also evaluated in the light of microstructure examination. Second, fatigue crack growth rates were measured for fully additive manufactured samples, as well as for samples containing an interface between WAAM® and wrought materials. The latter category covers five different scenarios of crack location and orientation with respect to the interface. Fatigue crack growth rates are compared with that of the wrought or WAAM® alone conditions. Crack growth trajectory of these tests is discussed in relation to the microstructure characteristics.

Original language	English
Pages (from-to)	790-803
Journal	Fatigue and Fracture of Engineering Materials and Structures
Volume	40
Issue number	5
Early online date	29 Nov 2016
DOIs	https://doi.org/10.1111/ffe.12547
Publication status	Published - May 2017

Bibliographical note

This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproductionin any medium, provided the original work is properly cited.

Keywords

fatigue crack growth
fracture toughness
microstructure
titanium
wire + arc additive manufacture

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10.1111/ffe.12547Licence: CC BY

Zhang et al-2016-Fatigue & Fracture of Engineering Materials & StructuresFinal published version, 2.25 MBLicence: CC BY

Xiang Zhang
- Centre for Manufacturing and Materials - Professor in Structural Integrity
Person: Teaching and Research

Cite this

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title = "Fracture toughness and fatigue crack growth rate properties in wire + arc additive manufactured Ti-6Al-4V",

abstract = "This paper presents an experimental investigation of the fracture and fatigue crack growth properties of Ti-6Al-4V produced by the Wire + Arc Additive Manufacture (WAAM{\textregistered}) process. First, fracture toughness was measured for two different orientations with respect to the build direction; the effect of wire oxygen content and build strategy were also evaluated in the light of microstructure examination. Second, fatigue crack growth rates were measured for fully additive manufactured samples, as well as for samples containing an interface between WAAM{\textregistered} and wrought materials. The latter category covers five different scenarios of crack location and orientation with respect to the interface. Fatigue crack growth rates are compared with that of the wrought or WAAM{\textregistered} alone conditions. Crack growth trajectory of these tests is discussed in relation to the microstructure characteristics. ",

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AU - Martina, F.

AU - Ding, J.

AU - Wang, X.

AU - Williams, S. W.

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AB - This paper presents an experimental investigation of the fracture and fatigue crack growth properties of Ti-6Al-4V produced by the Wire + Arc Additive Manufacture (WAAM®) process. First, fracture toughness was measured for two different orientations with respect to the build direction; the effect of wire oxygen content and build strategy were also evaluated in the light of microstructure examination. Second, fatigue crack growth rates were measured for fully additive manufactured samples, as well as for samples containing an interface between WAAM® and wrought materials. The latter category covers five different scenarios of crack location and orientation with respect to the interface. Fatigue crack growth rates are compared with that of the wrought or WAAM® alone conditions. Crack growth trajectory of these tests is discussed in relation to the microstructure characteristics.

KW - fatigue crack growth

KW - fracture toughness

KW - microstructure

KW - titanium

KW - wire + arc additive manufacture

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DO - 10.1111/ffe.12547

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ER -

Fracture toughness and fatigue crack growth rate properties in wire + arc additive manufactured Ti-6Al-4V

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Xiang Zhang

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