About this Abstract |
Meeting |
MS&T21: Materials Science & Technology
|
Symposium
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Additive Manufacturing of Metals: Microstructure, Properties and Alloy Development
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Presentation Title |
Influence of the Cellular Subgrain Feature in Additively Manufactured 316L Stainless Steel on Mechanical Properties |
Author(s) |
Janith Wanni, John G Michopoulos, Ajit Achuthan |
On-Site Speaker (Planned) |
Janith Wanni |
Abstract Scope |
Additively manufactured 316L stainless steel (316L) exhibits a greater strength than conventionally manufactured 316L without a substantial decrease in ductility. This behavior is attributed to the influence of the cellular subgrain feature present in AM 316L material. However, the mechanism responsible for the influence is not well understood or established yet. In this presentation, an experimental investigation conducted with the objective of gaining a better insight into the mechanism will be presented. The investigation primarily relies on the in-situ characterization of the heterogeneous deformation of the surface of specimens subjected to uniaxial tensile testing at microscopic length scale. It also consists of an ex-situ analysis of the deformation using SEM and AFM. Finally, a nanoindentation-based characterization will also be performed. From the characteristics of heterogeneous deformation, the mechanism responsible for the influence of subgrain feature on the mechanical properties of additively manufactured 316L is established. |