|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Additive Manufacturing of Metals: Establishing Location-Specific Processing-Microstructure-Property Relationships
||Tailoring the Mechanical Properties of Ni-base Superalloys Processed by Direct Metal Laser Melting (DMLM)
||Thomas Etter, Fabian Geiger, Karsten Kunze
|On-Site Speaker (Planned)
Direct Metal Laser Melting (DMLM) is an additive manufacturing technology which is used to produce metallic parts from powder layers. Test specimens of the Ni-base superalloys Hastelloy X and IN738LC were built with the loading direction oriented parallel (z-specimens) and perpendicular to the building direction (xy-specimens). Specimens were investigated in the “as-built” condition and after heat treatment. The elastic anisotropy of “as-built” material is well reflected in the Young’s modulus and is different for z- and xy-specimens. It is shown that suitable scanning strategies allow tailoring the texture and thus anisotropy of mechanical properties. Otherwise, a subsequent recrystallization heat treatment significantly reduces the anisotropy and improves the creep properties of DMLM-processed IN738LC. The characterisation of microstructural and textural anisotropy was done by Electron Back Scatter Diffraction (EBSD) analysis. Predictions on Young’s modulus calculated from the measured textures for Hastelloy X compare well with the data from tensile tests.
||Planned: Supplemental Proceedings volume