Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 753, Issue -, Pages 42-48Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2019.03.007
Keywords
Selective laser melting; Inconel 718; Scanning strategy; Grain size; Mechanical properties
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Funding
- National Natural Science Foundation of China (NSFC) [51771207, 51571199]
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The effect of scanning strategy, i.e. bidirectional scanning without (SS-X) and with a 90 degrees-rotation (SS-XY) for every layer, on mechanical properties of Inconel 718 fabricated by selective laser melting (SLM) was investigated. The results show that tensile strength and fatigue strength of SS-X specimens are superior to that of the SS-XY ones. Such excellent mechanical properties of the SS-X specimens at room temperature were found to mainly result from the processing-induced fine grain structures compared with void size, crystalline orientation or dendrite structure.
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