About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Titanium Technology
|
| Presentation Title |
Dwell Fatigue and its Thermal Alleviation in MTR free Ti alloy, Ti 6242 |
| Author(s) |
Tirthesh Ingale, Subham Chattoraj, Girish Bojjawar, Vasisht Venkatesh, Satyam Suwas, Dipankar Banerjee |
| On-Site Speaker (Planned) |
Dipankar Banerjee |
| Abstract Scope |
We describe the behavior in very low-intensity MTR Ti 6242 alloy under conventional stress-controlled conventional cyclic and dwell fatigue conditions. Dwell debits were typically less than a factor of two in this material. Microcracking has been explored in cross-sections of samples that failed in stress-controlled conventional cyclic and dwell fatigue at room temperature coupled with EBSD to determine crystallography of early crack initiation and extension. Crystallographic analysis shows that cracking occurs in those primary α grains which have a high combination of Schmid factor for basal slip and high resolved normal stress on the basal plane. Thermal alleviation of both conventional cyclic and dwell fatigue is observed, with a rapid saturation in strain accumulation with increasing fatigue cycling at the higher temperatures. A remarkable and unusual increase in static creep resistance is observed with increasing temperature to 300 C, beyond which creep rates again increase rapidly. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Titanium, Mechanical Properties, |