About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Titanium Technology
|
| Presentation Title |
On the reaction kinetics and microstructural evolution during gaseous nitriding of metastable beta titanium alloys |
| Author(s) |
Christopher P. Clark, Abhishek Sharma, Thomas L. Christiansen |
| On-Site Speaker (Planned) |
Christopher P. Clark |
| Abstract Scope |
This presentation investigates the nitriding kinetics and microstructural evolution during gaseous nitriding treatments of two metastable beta titanium alloys, Ti-15Mo (wt.%) and Ti-15-3 (Ti 15V-3Cr-3Al-3Sn wt.%). These are compared with commercially pure Grade 4 Titanium and two-phase α+β Grade 5 Titanium (Ti-6Al-4V wt.%) alloys. Following gas nitriding within the temperature range of 800-1050 °C, detailed microstructural characterization was carried out which revealed formation of a (TiN+Ti<sub>2</sub>N) compound layer along with an underlying 10-60 µm thick diffusion zone entirely consisting of HCP titanium. Additionally, nitrogen-ingress to the bulk alloy led to the formation of coarse grain-boundary α laths along with a concurrent coarsening of the parent β grains, which is more pronounced in the metastable beta alloys. On the basis of these observations, some insights into avoiding such grain coarsening and its deleterious effect on bulk mechanical properties are provided. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Surface Modification and Coatings, Titanium, Characterization |