| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Length-Scale Phenomena in Mechanical Response
|
| Presentation Title |
Length Scale Effects of Nanoindentation on Additively Manufactured Stainless Steel |
| Author(s) |
Kunqing Ding, Yin Zhang, Andrew J. Birnbaum, John G. Michopoulos, David L. McDowell, Ting Zhu |
| On-Site Speaker (Planned) |
Kunqing Ding |
| Abstract Scope |
Additively manufactured (AM) metallic materials often exhibit superior yield strength and strain hardening due to printing-induced sub-micron dislocation cell structures. Nanoindentation is recently used to probe the mechanical properties of both printed layers and stainless steel base plate with and without annealing treatment. We perform gradient plasticity finite element (GPFE) simulations to capture the nanoindentation size effect. GPFE simulations also enable us to approximately extract the uniaxial stress-strain behavior of printed layers and base plates from their nanoindentation responses at large indenter depths. Our results indicate that printing-induced dislocation cells play a significant role in the nanoindentation responses in both size dependent and independent regimes. This work underscores the interplay of length scale effects due to nanoindentation and printing-induced microstructure. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, High-Entropy Alloys, Modeling and Simulation |