About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
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Symposium
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Deformation and Damage Mechanisms of High Temperature Alloys
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Presentation Title |
Temperature Dependence of Tensile and Fatigue Properties of Additively Manufactured Ni-base Superalloys: A Comparative Study |
Author(s) |
Reza Ghiaasiaan, Arun Poudel, Nabeel Ahmad, Muztahid Muhammad, Paul R. Gradl, Shuai Shao, Nima Shamsaei |
On-Site Speaker (Planned) |
Shuai Shao |
Abstract Scope |
Additive Manufacturing (AM) is uniquely appealing for Ni-base superalloys, whose applications often require complex shapes and impose significant production costs due to the alloys’ poor machinability. In this work, the tensile and fatigue behaviors of several additively manufactured (AM) Ni-superalloys at temperatures ranging from cryogenic to elevated temperatures were investigated and compared. These alloys include Hastelloy X, Haynes 282, Inconel 718, and Inconel 625 produced via two AM processes namely laser powder bed fusion (L-PBF) and laser powder direct energy deposition (LP-DED). Thorough analyses on micro-/defect-structure as well as mechanical response under static/cyclic axial loads were performed. This study aimed to provide understanding of process-structure-property relationships for these AM alloys in two regards: (1) the micro-/defect-structural evolution as the result of thermal cycles has been studied based on scanning electron microscopy and x-ray computerized tomography, (2) both fatigue and tensile properties were attempted to be correlated with micro-/defect-structure. |
Proceedings Inclusion? |
Planned: |
Keywords |
High-Temperature Materials, Mechanical Properties, Copper / Nickel / Cobalt |