About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
2025 Graduate Student Poster Contest
|
| Presentation Title |
SPG-3: Deformation Kinking in a Laser-Based Powder Bed Fusion-Processed Ti-5Al-5Mo-5V-3Cr Alloy |
| Author(s) |
Deepak V Pillai, Dian Li, Sydney Fields, Yiliang Liao, Fan Sun, Liang Qi, Rajarshi Banerjee, Yufeng Zheng |
| On-Site Speaker (Planned) |
Deepak V Pillai |
| Abstract Scope |
Metastable beta titanium alloys are of great interest for advanced structural applications due to their excellent tensile strength, great fatigue resistance, and deep-hardening capability. Laser-based powder bed fusion (PBF-LB/M) has emerged as a promising technique to manufacture near-net-shape metastable beta titanium components at reduced cost. However, the deformation mechanisms in such alloys remain poorly understood. In this work, we studied the deformation behavior in a PBF-LB/M processed Ti-5Al-5Mo-5V-3Cr (Ti-5553) alloy using SEM, TEM, and aberration-corrected STEM. The alloy exhibits enhanced ductility at room temperature despite of obvious strain softening. Unlike deformation twinning in conventionally processed Ti-5553, deformation kinking occurred in the PBF-LB/M Ti-5553 during tensile deformation. The type of deformation kinking was determined using SEM ESBD and TEM analysis. The nanoscale substructure of deformation kinking was studied in detail using aberration-corrected STEM. These findings provide new insights into the mechanical behavior of additively manufactured metastable beta titanium alloys. |