|About this Abstract
||Materials Science & Technology 2019
||Additive Manufacturing of Metals: Microstructure and Material Properties of Nickel-based Alloys
||Creep and Oxidation Performance of Alloy 282 Fabricated by Electron Beam Melting
||Sebastien Dryepondt, Mike Kirka, Patxi Fernandez-Zelaia, Yousub Lee, Kinga Unocic
|On-Site Speaker (Planned)
With a of gamma prime volume fraction of 20%, alloy Haynes® 282® (57Ni-20Cr-10Co-8.5Mo-2.1Ti-1.5Al) offers good creep resistance with low Al and Ti concentrations, which makes it a promising candidate for high temperature components fabricated by additive manufacturing. Crack-free ~ 99.5% dense plates were fabricated by electron beam melting to conduct tensile, creep and oxidation testing. Large grains elongated along the build direction were observed, with an average gamma prime size of 100nm in the as-fabricated condition and 20nm after annealing according to the recommended heat treatments. The alloy showed excellent creep resistance along the build direction both in the as-fabricated and annealed conditions. The alloy creep performance was, however, lower perpendicular to the build direction with lifetimes slightly inferior to the expected lifetimes for wrought 282. The cyclic oxidation performance of the alloy will also be discussed. This research was sponsored by the DOE office of fossil energy.
||Planned: At-meeting proceedings