Journal
INTERNATIONAL JOURNAL OF FATIGUE
Volume 101, Issue -, Pages 51-60Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ijfatigue.2017.04.009
Keywords
Additive manufacturing; Fatigue; Ti6AlV; Stress concentration; Fatigue notch factor
Funding
- Saab AB
- Swedish Foundation for Strategic Research
- European commission, through the Clean Sky 2 programme
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Additive manufacturing (AM) allows the manufacturer to produce parts with complex geometries that are difficult to produce with conventional production methods. Generally, AM is considered to have great potential for the aerospace industry by contributing to reduced weight and lower costs. There are a number of challenges to be solved before AM can be fully utilized in the aerospace industry, and the understanding of fatigue behaviour is one of the major challenges. Although the fatigue properties of flat additive manufactured specimens with rough as-built surfaces already have been widely studied, in practice, few aerospace components have a simple flat geometry with no corners or radii that would act as stress concentrations. Therefore, the combined effect on fatigue life of a rough as-built surface and a geometrical notch needs to be established. In this study, the fatigue properties of both laser sintered and electron beam melted Ti6A14V have been investigated and a combined effect of a rough as-built surface and a geometrical notch has been determined. In addition, hot isostatic pressing was found to have no impact on fatigue life for rough as-built surfaces. These findings can be directly applied to predict fatigue behaviour of an AM industrial component. (C) 2017 Elsevier Ltd. All rights reserved.
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