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Design of highly formable and strong titanium alloys through plasticity induced transformation

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Publication date2008
Host publicationTMS2008 - 137th Annual Meeting and Exhibition Supplemental Proceedings: Materials Processing and Properties
Pages357-362
Number of pages6
Volume1
<mark>Original language</mark>English
EventTMS 2008 Annual Meeting Supplemental: Materials Processing and Properties - New Orleans, LA, United States
Duration: 9/03/200813/03/2008

Conference

ConferenceTMS 2008 Annual Meeting Supplemental: Materials Processing and Properties
Country/TerritoryUnited States
CityNew Orleans, LA
Period9/03/0813/03/08

Conference

ConferenceTMS 2008 Annual Meeting Supplemental: Materials Processing and Properties
Country/TerritoryUnited States
CityNew Orleans, LA
Period9/03/0813/03/08

Abstract

Preliminary studies show the existence of Plasticity induced Transformation in metastable β-Titanium alloys (PiTTi), an effect similar to TRIP in steels. Extensive studies have been carried out to understand the defining heat treatment parameters to promote PiTTi effect in Ti-10V-2Fe-3Al (wt.%) alloy for β and/or α+β conditions. Compression testing results show stress-induced martensite formation in β and β+(α+β) microstructures with ∼20% increase in strength. Based on Ghosh and Olson theory for martensite nucleation, a model was developed to estimate the M s temperature, a critical parameter for PiTTi optimization. The chemical inhomogeneities in the β phase are employed to predict its PiTTi ability.