Study of Alpha-Beta Transformation in Ti-6Al-4V-ELI. Mechanical and Microstructural Characteristics

Author:

Tarín Pascual1,Gualo Aurelio1,Simón Atonio Garcia1,Piris Nuria M.1,Badía Jose Maria1

Affiliation:

1. UPM

Abstract

In the Ti-6Al-4V-ELI alloy, the alpha phase is gradually transformed into the beta phase until beta-transus temperature ( 980°C) is reached, and the transformation is completed. It is important to identify the transformation kinetics to accomplish the solution heat treatments in which a phase alpha percentage remains unchanged. Kinetics and other transformation characteristics are evaluated, as well as their influence on subsequent cooling transformations, by differential and dilatometric thermal analysis, electric conductivity measurements, hardness measurements and metallographic observation, after performing controlled thermal treatments. Starting from the mill annealed condition, samples were heated at temperatures between 650-1000 °C for 1 hour, then water quenched and subsequently heated for aging, air cooled. Finally, the mechanical properties of samples heat treated were obtained.

Publisher

Trans Tech Publications, Ltd.

Subject

Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science

Reference16 articles.

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5. P. Tarín et al: Ti-2007, Science and Technology. Proceedings of "The 11th World Conference on Titanium (JIMIC5), 2007 -Vol. II, pp.1295-98. The Japan Institute of Metals, Japan.

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