Room Temperature Mechanical Properties of Additively Manufactured Ni-base Superalloys: A Comparative Study

• DOI: 10.1016/j.prostr.2022.03.012
• Publication Date: 2022-03-17T12:15:26Z
• Authors: Reza Ghiaasiaan; Arun Poudel; Nabeel Ahmad; Muztahid Muhammad; Paul R. Gradl; Shuai Shao; Nima Shamsaei
• Keywords: Inconel; Tensile testing; Fractography; Machinability; Near net shape

The unique layer-by-layer manufacturing strategy and near-net shaping capability of Additive Manufacturing (AM) make it a promising technology for Ni-superalloys components, where their typical service conditions demand complex shapes impose significant production costs due to the alloys' poor machinability. In this work, room temperature mechanical behavior several Ni-superalloys, including Hastelloy X, Inconel 718, 625, were investigated properties/performances compared. test specimens produced using various AM processes such as laser powder bed fusion (L-PBF) and/or direct energy deposition (LP-DED). Thorough analyses on microstructures well performance under static/cyclic axial loads have been performed specimens. This study aimed provide better understanding process-structure-property relationship processed in two steps. process-structure step: microstructural evolution result thermal cycles has studied by quantitative metallography based scanning electron microscopy (SEM). structure-property both measured fatigue tensile properties attempted be correlated with microstructure.