|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Phase Transformations and Microstructural Evolution
||Alpha Phase Precipitation in Metastable Beta Ti-Nb-Fe Alloys
||Fernando H. Costa, Eder S.N. Lopes, Rubens Caram
|On-Site Speaker (Planned)
Application of Ti alloys to produce structural components has steadily increased in the last years, leading to the development of new metastable beta Ti alloys. This type of Ti alloys is able to retain the beta bcc phase at the room temperature in a metastable state. Usually, beta phase in Ti alloy has low yield strength and low elastic modulus. However, aging heat treatments can lead to the controlled alpha hcp phase precipitation, finely dispersed in the beta matrix, resulting in enhanced mechanical behavior. The aim of this study was to investigate the mechanisms of alpha phase precipitation in Ti-Nb-Fe alloys. Samples were prepared by arc melting, plastically deformed by hot swaging and submitted to different aging heat treatments. Characterization was carried out by X-ray diffraction, scanning and transmission electron microscopies and mechanical tests. Application of the aging heat treatments resulted in reasonable ductility and high tensile strength values.
||Planned: A print-only volume