|About this Abstract
||Materials Science & Technology 2019
||Additive Manufacturing of Metals: Microstructure and Material Properties of Nickel-based Alloys
||Multiscale Characterization of Microstructures and Mechanical Properties of Inconel 718 Fabricated by Selective Laser Melting
||Sharniece Holland, Xiaoqing Wang, Jia Chen, Wenjun Cai, Feng Yan, Lin Li
|On-Site Speaker (Planned)
A multiscale investigation of the microstructures and mechanical properties of Inconel 718 fabricated by selective laser melting (SLM) was performed on the as-SLM and heat-treated (HT) samples at various build locations. The microstructures were characterized by optical microscopy, high-resolution scanning electron microscopy, and electron backscatter diffraction over a wide range of length-scales. The as-SLM samples exhibited unique multi-scale microstructure features, including a few hundred-micrometer melt pools and columnar cube-textured grains, micrometer-sized dendritic and cellular sub-grain structures from chemical segregation and precipitates. Upon heat treatment, recrystallization occurred in the sample, replacing the unique SLM microstructures with homogenized grains, annealing twins, and nanoscale precipitates. Dry sliding wear tests, Vickers hardness tests, and force modulation microscopy in the atomic force microscopy were conducted to characterize the mechanical properties of the SLM parts.
||Planned: At-meeting proceedings