期刊
INTERNATIONAL JOURNAL OF FATIGUE
卷 92, 期 -, 页码 499-506出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ijfatigue.2016.03.012
关键词
Inconel 718; Selective laser melting; Microstructure; Fatigue crack growth; Fractography
Growth of long fatigue cracks is investigated in Inconel 718 superalloy produced by selective laser melting (SLM). The fatigue crack growth curve and the threshold value of the stress intensity factor are experimentally determined on compact-tension specimens fabricated using a RENISHAW A250 system and the recommended processing parameters. The crack propagation curve and the crack propagation threshold of this SLM material are compared with literature data describing the behavior of conventionally manufactured Inconel 718. The fatigue crack growth is discussed in terms of the specific microstructure and residual stresses produced by selective laser melting. (C) 2016 Elsevier Ltd. All rights reserved.
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