| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Refractory Metals 2023
|
| Presentation Title |
Strengthening in Mo-La Alloys at Temperatures from 1500 ⁰C to 1700 ⁰C |
| Author(s) |
Monica R. Martinez Henriquez, Gary A. Rozak, Eric M. Taleff |
| On-Site Speaker (Planned) |
Monica R. Martinez Henriquez |
| Abstract Scope |
Lanthanated molybdenum (MoLa) alloys are commercially available and used at elevated temperatures, but limited data are available for the mechanical properties of MoLa alloys at high service temperatures. New data are presented for the strength and ductility of commercially-pure Mo and two MoLa alloys (1.0% and 0.6% La, by weight) at 1500 and 1700 ⁰C under constant true-strain rates of 10-4 and 3×10-5 s-1. The MoLa alloys retain greater strength at higher temperatures than pure Mo, although all the materials have a similar hardness at room temperature. Increasing La content decreases the propensity for recovery and recrystallization. Retained dislocation structures and fine grains in the MoLa alloys promote the formation of fine subgrains during elevated temperature deformation, which increase creep strength. The relationships between microstructure and strength at elevated temperatures are explored. |
| Proceedings Inclusion? |
Undecided |
| Keywords |
High-Temperature Materials, Mechanical Properties, |