About this Abstract |
Meeting |
2021 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2021)
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Symposium
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Materials
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Presentation Title |
Residual Stress Measurements via X-ray Diffraction Cos-α Method on Various Heat-Treated Inconel 625 Specimens Fabricated via Laser-Powder Bed Fusion |
Author(s) |
Mohanish Andurkar, Toshikazu Suzuki, Masanao Omori, Bart C. Prorok, John Gahl, Scott M. Thompson |
On-Site Speaker (Planned) |
Mohanish Andurkar |
Abstract Scope |
The residual stress and hardness of Inconel 625 fabricated using Laser Powder Bed Fusion (L-PBF) were experimentally investigated. As-built Inconel 625 samples were subjected to three different heat-treatment temperatures of 700 ºC, 900 ºC, 1050 ºC for one hour. Effects of these three-stress relieving heat treatment temperatures on the nature and value of residual stress were studied. Residual stress measurements were recorded using a portable X-ray system. The system calculated residual stress using the cos α method. The Full Width Half Maximum (FWHM) of diffraction peaks in all samples were measured. The results indicate that tensile residual stress was present on the surface of as-built L-PBF sample and compressive residual stress on the surface of heat-treated samples due to stress relief. Debye-Scherrer (D-S) ring positions were measured using the cos α method and compared with a reference wrought Inconel 625 ring position. Vickers microhardness and residual stress were found to be positively correlated. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |