About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Advances in Titanium Technology
|
Presentation Title |
The Effects of Fe and Al Additions on the Microstructure and Mechanical Property Evolution of Ti-11at.%Cr Alloys |
Author(s) |
JoAnn Ballor, Ashiq Shawon, Alex Zevalkink, Scott Misture, Jonathan Poplawsky, Carl J. Boehlert |
On-Site Speaker (Planned) |
Carl J. Boehlert |
Abstract Scope |
Low-cost alloying elements can help lower the cost of beta-titanium (Ti) alloys, and alloy composition is important for developing desired microstructures during processing. The low-cost alloying elements iron (Fe) and aluminum (Al) were added to a base Ti-11at%chromium (Cr) alloy, and an in-situ investigation of the mechanical properties and microstructural evaluation during 400C exposures was conducted. X-ray diffraction revealed that Ti-Cr and Ti-Cr-Fe alloys underwent the beta-to-omega and beta-to-alpha transformations, where the 0.85at% Fe addition reduced the volume fraction of the omega phase. The addition of 5.3at% Al (for the TCA and TCFA alloys) inhibited the beta-to-omega transformation. Resonance ultrasound spectroscopy indicated that the alloys containing the omega phase exhibited an increase in shear modulus of approximately 140%, while the alloys which exhibited only the beta-to alpha phase transformation exhibited an increase of approximately 102%. The kinetics of the phase transformations, which influenced the mechanical properties, will be illustrated. |
Proceedings Inclusion? |
Planned: |
Keywords |
Titanium, Mechanical Properties, Phase Transformations |