|About this Abstract
||MS&T22: Materials Science & Technology
||Processing-Microstructure-Property Relationships of Titanium and Titanium Alloys
||Design of New Metastable Ti Alloys and Determinations of Their Deformation Mechanisms Active during Tensile Deformation
||Brian A. Welk, Nevin Taylor, Zachary T. Kloenne, G. Babu Viswanathan, Hamish L. Fraser
|On-Site Speaker (Planned)
||Hamish L. Fraser
Metastable Ti alloys are those for which their microstructures, when heat-treated above the beta transus and quenched to room temperature, consist entirely of the beta phase rather than the formation of martensite commonly observed in quenched (alpha+beta) alloys (e.g., Ti64 (Ti-6Al-4V). Interestingly, the retained beta phase in the metastable beta alloys consists of a number of structural and compositional instabilities, most common being the omega and O’ phases. These latter phases influence the nucleation of the alpha phase such that extremely refined distributions of this latter phase may be obtained by tailored heat-treatments. In this paper, we report on the design of some new metastable beta alloys containing a variety of alpha distributions, differing in scale. The tensile properties of these new alloys will be listed, and the results of studies of the deformation mechanisms active in these refined microstructures will be reported.