About this Abstract |
Meeting |
2025 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2025)
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Symposium
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2025 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2025)
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Presentation Title |
Effect of Heat Treatment on the Microstructure and Room Temperature Mechanical Behavior of Monel K500 Alloy Fabricated via L-PBF and LP-DED |
Author(s) |
Indrajit Nandi, Reza Ghiaasiaan, Paul R. Gradl, Shuai Shao, Nima Shamsaei |
On-Site Speaker (Planned) |
Indrajit Nandi |
Abstract Scope |
This study examines and compares the effect of different heat treatments (HT) on the microstructure and mechanical behavior of Monel K500 fabricated using laser powder bed fusion (L-PBF) and laser powder directed energy deposition (LP-DED) technologies. The applicability of HT proposed in the literature for wrought Monel K500 was investigated for L-PBF and LP-DED using four different HT procedures involving hot isostatic pressing (HIP), solution annealing (SA), and aging. Uniaxial tensile and fully reversed strain controlled fatigue were performed at room temperature. The microstructural evolution of test specimens during HT and the fracture surfaces were analyzed using a scanning electron microscope. L-PBF specimens showed higher strength and elongation compared to LP-DED specimens. HT procedure involving HIP at 1160°C for 3hr at 100 MPa, SA at 1100°C for 15 min, and aging at 610°C for 8 hr resulted in the longest fatigue life for both L-PBF and LP-DED Monel K500. |
Proceedings Inclusion? |
Planned: Post-meeting proceedings |