Near-Surface Structure and Fatigue Crack Initiation Mechanisms of As-Built SLM Inconel 718

Radomila Konečná; Gianni Nicoletto

doi:10.4028/www.scientific.net/DDF.405.306

Paper Titles

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The SEM and TEM Analysis of IN718 Alloy after Fatigue Push-Pull Loading at 700°C
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Characterization of Microstructure of Crept Samples of Dissimilar Weld Joint Using Standard and Advanced Electron Microscopy Techniques
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Evaluation of Cavitation Damage in a Pipe Bend Made of 0.5Cr-0.5Mo-0.3V Steel by Optical Metallography and Replica Method
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Near-Surface Structure and Fatigue Crack Initiation Mechanisms of As-Built SLM Inconel 718
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Fatigue Behavior of Titanium Endoprosthesis
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Influence of Cyclic Loading on the Internal Friction Measured on Magnesium Alloys AZ31, AZ61 and AZ91
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SnO₂ Nano/Microfibers for Gas Sensors
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Effects on Microstructure and Corrosion Behavior of a Heat Treated CuZn36Pb2 Brass
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HomeDefect and Diffusion ForumDefect and Diffusion Forum Vol. 405Near-Surface Structure and Fatigue Crack...

Near-Surface Structure and Fatigue Crack Initiation Mechanisms of As-Built SLM Inconel 718

Abstract:

Challenging structural applications such as customized jet engine parts are increasingly fabricated by Selective Laser Melting (SLM) of Inconel 718 powder. The as-built surface quality of SLM parts is however inferior of the machined version and the fatigue behavior is negatively affected. The as-built fatigue response of SLM Inconel 718 was quantified here using three sets of directional specimens. Since the surface quality is influenced by powder characteristics, process parameters and layer-wise fabrication, fatigue results showed a directional contribution that was interpreted using metallography and fractography.

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Periodical:

Defect and Diffusion Forum (Volume 405)

Pages:

306-311

DOI:

https://doi.org/10.4028/www.scientific.net/DDF.405.306

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Online since:

November 2020

Authors:

Radomila Konečná*, Gianni Nicoletto

Keywords:

Crack Initiation, Fatigue Damage, Inconel 718, Microstructure, SLM

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* - Corresponding Author

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