High Temperature Deformation and Oxidation Behaviors of Inconel 718 Alloy Manufactured with Selective Laser Melting

2017 ◽  
Author(s):  
Y. Kang ◽  
Y. Kim ◽  
J. Yu ◽  
K. Lee
Keyword(s):  
High Temperature ◽  
Selective Laser Melting ◽  
Inconel 718 ◽  
High Temperature Deformation ◽  
Temperature Deformation ◽  
Laser Melting ◽  
Inconel 718 Alloy ◽  
Oxidation Behaviors

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.

High Temperature Deformation and Diffusion Brazing of INCONEL 718 Sheet

2014 ◽  
Vol 622-623 ◽  
pp. 508-513
Author(s):  
Yong Nam Kwon ◽  
S.S. Hong ◽  
H.G. Kim
Keyword(s):  
High Temperature ◽  
Diffusion Bonding ◽  
Inconel 718 ◽  
Elevated Temperatures ◽  
High Temperature Deformation ◽  
Temperature Deformation ◽  
Manufacturing Cost ◽  
Lap Shear ◽  
Diffusion Brazing ◽  
And Diffusion

Superplastic forming has been known for the ideal process for manufacturing complex parts. Also, diffusion bonding can give a higher design flexibility, which allows a better performance with a lower overall manufacturing cost. Fine grained INCONEL 718 alloy sheet has been known to show superplastic behavior with the combination of high strength and corrosion resistance at the elevated temperatures. In the present study, high temperature deformation characteristic of INCONEL 718 sheet with 15m was investigated firstly. Then, blow forming process with cylindrical cavity was tried. Also, best diffusion brazing and bonding condition was tried to be defined in terms of temperature, pressure and time. Bonding strength was characterized by using lap shear type test and interface observation. Characteristics of deformation and diffusion bonding at high temperature were influenced greatly with grain size while Nb precipitate also played an important role.

Friction and wear behaviour of Inconel 718 alloy fabricated by selective laser melting after heat treatments

2018 ◽  
Vol 98 (12) ◽  
pp. 547-555 ◽  
Author(s):  
Zhanyong Zhao ◽  
Hongqiao Qu ◽  
Peikang Bai ◽  
Jing Li ◽  
Liyun Wu ◽  
...  
Keyword(s):  
Selective Laser Melting ◽  
Inconel 718 ◽  
Friction And Wear ◽  
Heat Treatments ◽  
Wear Behaviour ◽  
Laser Melting ◽  
Inconel 718 Alloy
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