About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Additive Manufacturing of Metals: Applications of Solidification Fundamentals
|
Presentation Title |
A-36: Understanding the Impact of Residual Stresses on Microstructure Evolution in Additive Manufacturing |
Author(s) |
Michael Haines, Nima Haghdadi, Sophie Primig |
On-Site Speaker (Planned) |
Michael Haines |
Abstract Scope |
Residual stresses after powder bed fusion (PBF) additive manufacturing processes contribute to defect formation though delamination and cracking in builds. Further, they are known to introduce additional dense networks of dislocations, resulting in yield stress increments. Yet, the current understanding of how changes in these residual stresses due to variations in geometry and/or the temporal and spatial thermal conditions may impact the microstructure evolution and property control remains limited. This work utilizes an approach to print specific geometries with the expressed interest in looking at the impact of residual stress on microstructural constituents. Thermo-mechanical simulations were carried out to get an estimate on the stress and strain distributions in special geometries designed for this study. These geometries were then printed from IN718 and Ti-6Al-4V alloys under electron beam – PBF. Advanced characterization techniques were used to better understand how variation in residual stress impact the microstructure. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Computational Materials Science & Engineering, Titanium |