About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
2026 Technical Division Student Poster Contest
|
| Presentation Title |
SPG-49: Microstructural Evolution of LPBF Ti-6Al-4V by Friction Stir Processing and Its Effect on Micromilling |
| Author(s) |
Prabhat Ranjan, Bhavesh Chaudhary, Soham Mujumdar |
| On-Site Speaker (Planned) |
Prabhat Ranjan |
| Abstract Scope |
Laser powder bed fusion (LPBF) of Ti-6Al-4V enables fabrication of complex components but often results in high residual stresses, porosity, and limited ductility. Friction stir processing (FSP) has emerged as an effective localized post-processing technique to modify microstructure and improve mechanical performance of additively manufactured alloys. In this study, LPBF-fabricated Ti-6Al-4V was subjected to FSP, transforming the acicular α′ martensitic structure into a refined α+β microstructure. Hardness and ductility increased by approximately 10% and 16%, respectively, while tensile strength remained unchanged and residual stresses were reduced to one-third of the as-built condition. Micromilling experiments were used to assess the influence of microstructural modification on machining behaviour. The refined α+β microstructure of FSP sample exhibited higher resistance to rapid plastic deformation, resulting in increased cutting forces and tool wear compared to the as-built LPBF condition. These results highlight the strong linkage between microstructural transformation and machining response in post-processed LPBF Ti-6Al-4V. |
| Proceedings Inclusion? |
Undecided |
| Keywords |
Additive Manufacturing, Phase Transformations, Titanium |