Elevated Temperature Notch Sensitivity of Inconel 718 Manufactured by Selective Laser Melting

2021 ◽  
Author(s):  
Tait D. McLouth ◽  
David B. Witkin ◽  
Julian R. Lohser ◽  
Glenn E. Bean ◽  
Scott D. Sitzman ◽  
...  
Keyword(s):  
Elevated Temperature ◽  
Selective Laser Melting ◽  
Inconel 718 ◽  
Notch Sensitivity ◽  
Laser Melting

scholarly journals Very-High-Cycle Fatigue Behavior of Inconel 718 Alloy Fabricated by Selective Laser Melting at Elevated Temperature

Materials ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 1001
Author(s):  
Zongxian Song ◽  
Wenbin Gao ◽  
Dongpo Wang ◽  
Zhisheng Wu ◽  
Meifang Yan ◽  
...  
Keyword(s):  
Elevated Temperature ◽  
Selective Laser Melting ◽  
Fatigue Resistance ◽  
Inconel 718 ◽  
High Cycle Fatigue ◽  
Cycle Fatigue ◽  
Laser Melting ◽  
Inconel 718 Alloy ◽  
Very High Cycle Fatigue ◽  
Very High

This study investigates the very-high-cycle fatigue (VHCF) behavior at elevated temperature (650 °C) of the Inconel 718 alloy fabricated by selective laser melting (SLM). The results are compared with those of the wrought alloy. Large columnar grain with a cellular structure in the grain interior and Laves/δ phases precipitated along the grain boundaries were exhibited in the SLM alloy, while fine equiaxed grains were present in the wrought alloy. The elevated temperature had a minor effect on the fatigue resistance in the regime below 108 cycles for the SLM alloy but significantly reduced the fatigue strength in the VHCF regime above 108 cycles. Both the SLM and wrought specimens exhibited similar fatigue resistance in the fatigue life regime of fewer than 107–108 cycles at elevated temperature, and the surface initiation mechanism was dominant in both alloys. In a VHCF regime above 107–108 cycles at elevated temperature, the wrought material exhibited slightly better fatigue resistance than the SLM alloy. All fatigue cracks are initiated from the internal defects or the microstructure discontinuities. The precipitation of Laves and δ phases is examined after fatigue tests at high temperatures, and the effect of microstructure on the formation and the propagation of the microstructural small cracks is also discussed.

Temperature and strain-rate dependence of the elevated temperature ductility of Inconel 718 prepared by selective laser melting

2021 ◽  
pp. 141814
Author(s):  
Tait D. McLouth ◽  
David B. Witkin ◽  
Julian R. Lohser ◽  
Scott D. Sitzman ◽  
Paul M. Adams ◽  
...  
Keyword(s):  
Elevated Temperature ◽  
Strain Rate ◽  
Selective Laser Melting ◽  
Inconel 718 ◽  
Rate Dependence ◽  
Strain Rate Dependence ◽  
Laser Melting

scholarly journals Effect on microstructural and mechanical properties of Inconel 718 superalloy fabricated by selective laser melting with rescanning by low energy density

2021 ◽  
Vol 10 ◽  
pp. 785-796
Author(s):  
Jung Hyun Park ◽  
Gyung Bae Bang ◽  
Kee-Ahn Lee ◽  
Yong Son ◽  
Won Rae Kim ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Energy Density ◽  
Selective Laser Melting ◽  
Inconel 718 ◽  
Low Energy ◽  
Laser Melting ◽  
Inconel 718 Superalloy

Influence of grain inhomogeneity and precipitates on the stress rupture properties of Inconel 718 superalloy fabricated by selective laser melting

2021 ◽  
Vol 803 ◽  
pp. 140702
Author(s):  
Shuya Zhang ◽  
Xin Lin ◽  
Lilin Wang ◽  
Xiaobin Yu ◽  
Haiou Yang ◽  
...  
Keyword(s):  
Selective Laser Melting ◽  
Inconel 718 ◽  
Stress Rupture ◽  
Laser Melting ◽  
Stress Rupture Properties ◽  
Inconel 718 Superalloy ◽  
Rupture Properties

Effect of Heat Treatment on the Microstructure and Properties of Inconel 718 Alloy Fabricated by Selective Laser Melting

2021 ◽  
Author(s):  
Rongxia Zhao ◽  
Zhanyong Zhao ◽  
Peikang Bai ◽  
Wenbo Du ◽  
Lizheng Zhang ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Selective Laser Melting ◽  
Inconel 718 ◽  
Laser Melting ◽  
Inconel 718 Alloy ◽  
Microstructure And Properties

Residual stress evaluation in selective-laser-melting additively manufactured titanium (Ti-6Al-4V) and inconel 718 using the contour method and numerical simulation

2018 ◽  
Vol 22 ◽  
pp. 571-582 ◽  
Author(s):  
Bilal Ahmad ◽  
Sjoerd O. van der Veen ◽  
Michael E. Fitzpatrick ◽  
Hua Guo
Keyword(s):  
Numerical Simulation ◽  
Residual Stress ◽  
Selective Laser Melting ◽  
Inconel 718 ◽  
Contour Method ◽  
Laser Melting ◽  
Stress Evaluation
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