About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Additive Manufacturing: Materials Design and Alloy Development V – Design Fundamentals
|
Presentation Title |
Design and Development of New Metastable Titanium Alloys for Use in Laser Powder Bed Fusion |
Author(s) |
Zou Zhiyi , Marco Simonelli, Adam Clare, Nesma Aboulkhair, Richard Hague |
On-Site Speaker (Planned) |
Marco Simonelli |
Abstract Scope |
In this study we present a new strategy to design and develop low-cost titanium metastable alloys for use in Laser Powder Bed Fusion (L-PBF). The work illustrates a computational methodology that integrates CALPHAD and empirical relationships to determine the stability of the ß phase within a Ti-Sn-Cr system. We show how the methodology can be used to identify printable compositions that retain a full metastable ß phase upon rapid solidification. The alloy is also designed to resist solidification and cold cracking and maintain the typical strain-transformable attributes of the metastable ß phase despite the L-PBF thermal cycling. Deformation is then linked to the TRIP and TWIP character of the alloys as a function of solute Sn concentration. Strain transformation is studied using a number of techniques, including SEM in-situ tensile microscopy. Findings support a new strategy that can be extended to other alloy systems and their rapid development. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Titanium, Computational Materials Science & Engineering |