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Meeting 2025 TMS Annual Meeting & Exhibition
Symposium Refractory Metals 2025
Presentation Title Flow Stress and Microstructural Evolution of TZM and Mo-La Alloys at Temperatures From 1400 to 1700 °C
Author(s) Monica R. Martinez Henriquez, Gary A. Rozak, Eric M. Taleff
On-Site Speaker (Planned) Monica R. Martinez Henriquez
Abstract Scope Flow stress and microstructural evolution at high temperatures are studied in commercially pure Mo and two Mo alloys: TZM (Ti-Zr-Mo) and Mo-0.6La (Mo with 0.6 wt% La). TZM contains oxide and carbide dispersoids with Ti and Zr, and Mo-La contains La2O3 dispersoids. Static annealing tests were performed at temperatures from 1400 to 1700 °C, and uniaxial tensile tests at 1500 and 1700 °C under constant true-strain rates of 10-3, 10-4 and 3×10-5 s-1. At high temperatures, the effects of dispersoids in TZM diminish, leading to grain sizes similar to unalloyed Mo, with only a 21% increase in ultimate tensile strength at 1700 °C. In contrast, the dispersoids in Mo-0.6La provide more effective pinning, resulting in a high recrystallization temperature and smaller grain sizes. Mo-0.6La exhibits up to twice the strength of TZM at 1700 °C with finer subgrains. The relationship between high-temperature strength and subgrain sizes during deformation is explored.
Proceedings Inclusion? Planned:
Keywords High-Temperature Materials,

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Application of High Temperature Profilometry-Based Indentation Plastometry (HT-PIP) to Refractory Metals
Assessment of State of the Art in Refractory Niobium Alloys
C-17: Fabrication of Mo-Si-B Alloy Through Spark Plasma Sintering using Mo Powder Containing La2O3 Nanoparticles Uniformly Dispersed via Ultrasonic Spray Pyrolysis
C-18: Get Low: Achieving Ultra-Fine Grain Sizes in Niobium with High-Pressure Torsion
C-19: Investigating the Microstructure and High-Temperature Mechanical Properties of Additively Manufactured W-Re Alloys
C-20: New Family of Refractory Ti-Rich HEA Superconductors with High Upper Critical Field
Characterizing Recrystallization in Type 2 and Type 5 Nb
Combinatorial Approaches to Design and Processing of Refractory High Entropy Alloys
Creep Resistant Refractory Multiple-Principal-Element Alloy
Designing Refractory Alloy Bond Coats That Develop Thermally-Grown Complex Oxides: An Investigation of the Cr-Ta System
Effect of Geometric Features on Liquid Metal Dealloying of Additively Manufactured Niobium-Titanium
Effect of Microstructure on Machining Pure Tungsten
Evaluating Microstructure and Strength Properties of Tungsten Based Refractory Multi-Principal Element Alloy Fabricated by Laser Based Directed Energy Deposition
Fatigue Crack Propagation in Semi-Brittle Materials: A Case Study on Tungsten
Flow Stress and Microstructural Evolution of TZM and Mo-La Alloys at Temperatures From 1400 to 1700 °C
Heat Treatment Optimization of Laser Powder Bed Fusion Additive Manufacture C103
High-Temperature Deformation in Nb-Based Alloy C103 (Nb-10Hf-1Ti)
High-Throughput Design, Synthesis, and Characterization of Refractory Multi-Principal Element Alloys (MPEAs)
Low Temperature Oxidation Behavior of Pure Niobium and C103 Niobium Alloy
Mechanical Behavior of Neutron Irradiated Ta-W Alloy
Microstructural Evolution of Nb-Alloys Produced via High-Pressure Torsion
Microstructure and Mechanical Properties of a Mo-Si-B-Ti Alloy Manufactured by Laser Powder Bed Fusion
New Microscopic Insights on the High Temperature Deformation Mechanisms in Refractory Metals and Alloys
Observations on Surface Deformation of Tungsten Materials in Laser Focus in Air
Oxidation of Refractory Metals in Molecular and Dissociated Oxygen
Preparation of Spherical Tungsten Alloy Powder with Particle Atomic Layer Deposition
Refractory Alloy Microstructure Development with Processing Variations
Refractory Metals, A Nanocrystalline Approach
Temperature Dependent Deformation in Single Crystalline MoNbTi
The Development of New Thermodynamic Databases for Niobium and Molybdenum Alloys
The High Temperature Performance of Mechanically Processed Equiatomic NbTaV Refractory Alloy
Understanding the Microstructural Evolution and Mechanical Property in As-Cast and Annealed Refractory High Entropy Alloys

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