Processing of Haynes® 282® Alloy by Laser Powder Bed Fusion Technology

Haynes® 282® is a superalloy that offers excellent creep resistance up to 0.7 of its melting point. Promoted by aerospace industries, recommending a sound process window for additive manufacturing of this material is critical. In this study, the processing conditions were optimized by fabricating 84 test cubes using 36 different parameter sets. Thereafter, selected samples were solution annealed followed by a two-step aging for all. The cubes were optically analyzed for their porosity and defects to select the most promising parameters. Scanning electronmicroscopy (SEM) technique was employed to characterize those features. It was observed that selection of improper parameter combination has adverse effect on the porosity of the material and may cause systematic material cracking. Existing cracks were analyzed regarding their size and orientation pattern among selected and representative samples.