|About this Abstract
||2021 TMS Annual Meeting & Exhibition
||Additive Manufacturing Fatigue and Fracture V: Processing-Structure-Property Investigations and Application to Qualification
||Plastic localization in Additively Manufactured 316L Austenitic Stainless Steel.
||F. Wang, M. A. Charpagne, V. Valle, P. Villechaire, S.R. Agnew, D.S. Gianola, T. M. Pollock, Jean-Charles Stinville
|On-Site Speaker (Planned)
Additively manufactured (AM)316L stainless steel parts can display simultaneously improved yield strength and ductility, as compared to their as-cast or wrought counterparts. This is undoubtedly associated with the complex grain, sub-grain, and dislocation cell structures, which result from solidification, high cooling rates and reheating that occur during the additive manufacturing process. Plastic localization is investigated using high-resolution digital image correlation (HR-DIC), electron channeling contrast imaging (ECCI) and transmission electron microscopy (TEM) during early stages of plastic deformation of conventional and AM 316L stainless steel samples. Multi-scale interactions of
slip localization with dislocation cell structure, sub-grain boundaries and grain boundaries are revealed over a large number of grains. Coupled with discrete dislocation dynamics (DDD) and crystal plasticity simulations, the microstructural origins of the enhanced properties of the AM parts are elucidated. The effects of additive manufacturing processing parameters on plastic localization and their consequences on the fatigue properties are discussed.
||Additive Manufacturing, Mechanical Properties,