| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Length-Scale Phenomena in Mechanical Response
|
| Presentation Title |
A-52: Operando Synchrotron Powder XRD Reveal 316L Stainless Steel Microstructure Evolution during Additive Manufacturing |
| Author(s) |
Kouider Abdellah Abdesselam, Steve Gaudez, Hakim Gharbi, Steven Van Petegem, Manas V. Upadhyay |
| On-Site Speaker (Planned) |
Kouider Abdellah Abdesselam |
| Abstract Scope |
During metal AM, solid state thermal cycling (SSTC) occurs when the as solidified material undergoes multiple heating-cooling cycles at different temperature amplitudes and rates. This could trigger mechanisms such as dislocation dynamics, phase transformation, etc., that would result in microstructure evolution and determine the material’s eventual mechanical response. To understand the role of SSTC on microstructure evolution during AM, operando synchrotron powder XRD experiments were carried out at ESRF during laser metal deposition (LMD) of 316L steel using a novel miniature LMD machine developed by us. The experiments involved following the microstructure evolution at the 20th layer during building of an 80-layer wall. In this talk, we will present the results of this experiment, specifically, the evolution of the average hkl peak positions (lattice strains), broadening (dislocation density), and intensity (texture) as a function of number of layers added and discuss the impact on the eventual mechanical response of materials. |
| Proceedings Inclusion? |
Planned: |