|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Phase Transformations and Microstructural Evolution
||The Effect of Low-temperature Aging on the Microstructure and Mechanical Behavior of Martensitic Ti-Nb Alloy
||Marissa Linne, Rohini Sankaran, Sharon Torres, Joseph Mckeown, Amanda Wu
|On-Site Speaker (Planned)
Nb-lean martensitic Ti-Nb has been given less attention than β-stable alloys, despite demonstrating similarly low elastic stiffness at a lower cost and weight. In this work, the low-temperature thermal stability of martensitic Ti-Nb is investigated, as it is less well understood and is important for developing processing parameters for achieving desired mechanical properties. Ti- 20 wt % Nb α'' martensite was aged at 250 °C, 400 °C and 550 °C for time intervals ranging from 10 minutes to 10 days. The effects on structure and mechanical behavior were assessed using X-ray diffraction, microhardness and electron backscatter diffraction. These experimental results contribute to a better understanding of (1) how the martensite microstructure evolves during aging at temperatures low enough to avoid austenitic transformation to the β phase and (2) how these changes affect deformation mechanism activity.
This work was performed by LLNL under Contract DE-AC52-07NA27344.
||Mechanical Properties, Phase Transformations, Titanium