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Metals 2018, 8(1), 75; https://doi.org/10.3390/met8010075

A Review of the As-Built SLM Ti-6Al-4V Mechanical Properties towards Achieving Fatigue Resistant Designs

1
School of Engineering, RMIT University, Melbourne, VIC 3001, Australia
2
School of Engineering, University of Limerick, Limerick V94 T9PX, Ireland
3
Defence Science and Technology Group, Fishermans Bend, VIC 3207, Australia
*
Author to whom correspondence should be addressed.
Received: 27 December 2017 / Revised: 16 January 2018 / Accepted: 18 January 2018 / Published: 19 January 2018
(This article belongs to the Special Issue Fatigue Damage of Additively-Manufactured Metallic Materials)
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Abstract

Ti-6Al-4V has been widely used in both the biomedical and aerospace industry, due to its high strength, corrosion resistance, high fracture toughness and light weight. Additive manufacturing (AM) is an attractive method of Ti-6Al-4V parts’ fabrication, as it provides a low waste alternative for complex geometries. With continued progress being made in SLM technology, the influence of build layers, grain boundaries and defects can be combined to improve further the design process and allow the fabrication of components with improved static and fatigue strength in critical loading directions. To initiate this possibility, the mechanical properties, including monotonic, low and high cycle fatigue and fracture mechanical behaviour, of machined as-built SLM Ti-6Al-4V, have been critically reviewed in order to inform the research community. The corresponding crystallographic phases, defects and layer orientations have been analysed to determine the influence of these features on the mechanical behaviour. This review paper intends to enhance our understanding of how these features can be manipulated and utilised to improve the fatigue resistance of components fabricated from Ti-6Al-4V using the SLM technology. View Full-Text
Keywords: selective laser melting; Ti-6Al-4V; additive manufacturing; mechanical properties; fatigue; fracture selective laser melting; Ti-6Al-4V; additive manufacturing; mechanical properties; fatigue; fracture
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Agius, D.; Kourousis, K.I.; Wallbrink, C. A Review of the As-Built SLM Ti-6Al-4V Mechanical Properties towards Achieving Fatigue Resistant Designs. Metals 2018, 8, 75.

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