Microstructure and Mechanical Properties of Titanium Alloys Produced by Hydrogen Sintering and Phase Transformation (HSPT) Chapter uri icon

abstract

  • Summary Hydrogen sintering and phase transformation (HSPT) is a new, low-cost, blended elemental (BE), press and sinter process. During HSPT, hydrogenated titanium powder is blended with alloying elements, sintered under a dynamically controlled H2 partial pressure, and subsequently dehydrogenated. HSPT utilizes phase transformations in the Ti-H alloy systems to refine the microstructure during sintering. Therefore, ultra-fine grain microstructures with mechanical properties that exceed ASTM standards for wrought processing are produced in the as-sintered state. Typically, HSPT sintered Ti-6Al-4V has strength exceeding 1 GPa and ductility exceeding 15 %EL. Additionally, subsequent heat treatments can be utilized to further evolve the microstructure and tailor the mechanical properties without the need for thermomechanical work. The various microstructures and the resulting static strength, ductility, and fatigue performance of titanium alloys produced via HSPT will be discussed and compared with traditional processes such as vacuum sintering and wrought processing.

author list (cited authors)

  • Paramore, J. D., Sun, P., Dunstan, M., Fang, Z. Z., Koopman, M., & Yang, L. u.

citation count

  • 2

complete list of authors

  • Paramore, James D||Sun, Pei||Dunstan, Matt||Fang, Z Zak||Koopman, Mark||Yang, Lu

Book Title

  • Proceedings of the 13th World Conference on Titanium

publication date

  • January 2016

publisher