| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Composition–Processing–Microstructure-Property Relationships of Titanium Alloys
|
| Presentation Title |
A Study on High-Temperature Deformation Behavior, Mechanism and Microstructure Evolution of Ti-900 Alloy for Gas Turbine Blade Application |
| Author(s) |
Dipayan Chakraborty, Ajay Kumar |
| On-Site Speaker (Planned) |
Dipayan Chakraborty |
| Abstract Scope |
High-temperature deformation behavior of novel Ti-900 (Ti-6.5Al-3.2Mo-1.8Zr-0.25Si) alloy with equiaxed microstructure is studied by conducting isothermal hot compression tests at 850°C-1050°C temperatures and 0.001s-1 to 10s-1 strain rates. The focus is on establishing a processing map and conducting microstructural analysis. Flow softening is prominent at 10s-1 strain rate with steady-state flow from a strain rate of 0.001s-1 to 1s-1. Optimal efficiency is observed at 900°C and 0.001s-1 and instability at higher strain rates. Air-cooled microstructure remains equiaxed at 850°C and 900°C, changes to bimodal at 950°C and Widmanstätten at higher temperatures. Water quenching after post-compression is also performed. Deformation mechanisms and texture are characterized by EBSD, highlighting DRX of the α phase, which can cause a decrease in LAGBs and an increase in HAGBs, is the main deformation mechanism in the α+β field deformation. QForm simulation software is employed for further investigation, ensuring defect-free manufacturing of gas turbine stator blades. |