| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
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| Symposium
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Processing—Microstructure—Property Relationships of Titanium and Titanium Alloys
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| Presentation Title |
Influence of Athermal vs. Isothermal Omega Precipitation and Alpha Precipitation on TRIP/TWIP Deformation Mechanisms in Metastable Beta Ti alloys (invited) |
| Author(s) |
Srinivas Aditya Mantri, Abhishek Sharma, Riyadh Salloom, MSKKY Nartu, Sriswaroop Dasari, Srinivasan Srivilliputhur, Rajarshi Banerjee |
| On-Site Speaker (Planned) |
Rajarshi Banerjee |
| Abstract Scope |
This talk will focus on the effects of heat treatment on the phase transformations, mechanical properties, and deformation behavior in a commercially metastable Beta-Ti alloy, Ti-10V-2Fe-3Al(wt%) and a binary model alloy, Ti-20V(wt%), both exhibiting TRIP/TWIP effects in the single beta solid solution phase. Low temperature annealing resulting in formation/growth of omega precipitates, followed by subsequent annealing at higher temperatures, resulted in fine-scale alpha precipitation. A difference in the tensile properties and deformation mechanism was also noted between samples with a beta + omega microstructure versus those with a beta + alpha microstructure. While the single beta + athermal omega condition showed transformation induced plasticity (TRIP), leading to substantial strain-hardening, the beta + isothermal omega and beta + alpha condition deformed via slip. These results can be rationalize based on both the beta matrix stability coupled with the changes in the modulus of the omega precipitates. |