Journal
ECF22 - LOADING AND ENVIRONMENTAL EFFECTS ON STRUCTURAL INTEGRITY
Volume 13, Issue -, Pages 1762-1767Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.prostr.2018.12.371
Keywords
Fatigue; Additive Manufacturing; Inconel 718; Notch; Elastic Stress Fields
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Selective Laser Melted (SLM) Inconel 718 has promising use in various applications, where complex design and excellent strength is required. Yet fatigue properties of respective components in critical load bearing applications are yet poorly understood. Here, we investigate the fatigue behaviour of different notch geometries of as-build specimens at room temperature. The fatigue strength of semi-circular and v-shaped notch geometries are evaluated and the results compared with those of smooth specimens. The stress fields of the different geometries are analysed by use of analytical models and numerically by use of finite element. The fatigue data shows a smaller scatter in the geometries with printed overhangs than the ones without. High values of notch sensitivity is obtained for both notch geometries. Fatigue properties of AM Inconel 718 are so far underexplored, this research therefore adds to the applicability of this material and manufacturing method for load bearing applications. (C) 2018 The Authors. Published by Elsevier B.V.
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