The effect of heat treatment on microstructure and mechanical properties of Ti-8.5Nb-4.5Ta-13Zr alloy
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The effects of the heat treatment on the phase transformations, microstructures and
mechanical properties of Ti-8.5Nb-4.5Ta-13Zr alloy were studies in this work. Some of the starting
powder were obtained by hydrogenation method and homogenized with metallic tantalum in a highenergy
planetary mill. The samples were compacted in a uniaxial and cold isostatic presses and
then, sintered at 1150 °C for 10 hours under high vacuum. The heat treatments were carried out at
the same sintering temperature, above the α / β transus, at different cooling rates such as furnace
cooling, air cooling and water quenching. The sintered samples were characterized using the
Archimedes density method, X-ray diffraction (XRD) and scanning electron microscopy (SEM).
The microhardness was measured using the Vickers indentation (ASTM E384-11 Standard). It was
shown that the microstructure of Ti-8.5Nb-4.5Ta-13Zr alloy consists of beta-phase matrix and
alpha-phase region of two structures: equiaxed and needle-like grains also known as Widmanstätten
structure. The precipitation of the alpha-phase in the beta-phase matrix led to an increase in Vickers
microhardness of the alloy which was furnace cooled. Moreover, a few remaining pores were still
found and density above 98% was achieved.
Como referenciar
MENDES, N.M.F.; MENDES, M.W.D.; BRESSIANI, A.H.A.; TAKIISHI, H. The effect of heat treatment on microstructure and mechanical properties of Ti-8.5Nb-4.5Ta-13Zr alloy. Materials Science Forum, v. 899, p. 389-394, 2017. DOI: 10.4028/www.scientific.net/MSF.899.389. Disponível em: http://repositorio.ipen.br/handle/123456789/28496. Acesso em: 20 Mar 2026.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.