| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing for Energy Applications III
|
| Presentation Title |
The Effect of Grain Orientation on Nanoindentation Behavior of Selective Laser Melted Austenitic Stainless Steel |
| Author(s) |
Sravya Tekumalla, Sudharshan Raman, Matteo Seita |
| On-Site Speaker (Planned) |
Sravya Tekumalla |
| Abstract Scope |
Due to the directional cooling rates and thermal gradients involved, selective laser melting (SLM) yields metal parts with complex solidification microstructures that exhibit anisotropic mechanical properties, even in normally isotropic materials such as stainless steel 316L (SS316L). In this work, we present a detailed study of the anisotropic deformation behavior of SLM SS316L as a function of grain orientation using instrumented nanoindentation. We produce near-single crystal samples oriented along the <111>, <101>, and <100> crystallographic directions and study their hardness and room temperature creep. We find that the {111} orientation exhibits the highest hardness, while the {100} orientation exhibits the greatest resistance to creep deformation. We correlate the mechanical anisotropy to the propensity of different grain orientations for deformation slip and twinning and elucidate the suppression of deformation twinning in {100}. Our work enables translation of the mechanical deformation behavior to effective design of structural components made from SLM SS316L. |
| Proceedings Inclusion? |
Planned: |