Powder Metallurgical Processing of Ti6Al4V Alloy

Abstract:

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Ti6Al4V powders were produced by Argon gas atomization, the powder fraction < 250μm was hot isostatically pressed (HIP) at 920°C and 140MPa. The properties of pre-alloyed powders and the compact were investigated in this paper. Powder particles are almost perfectly spherical. The microstructure of powder surface is approximate hexagonal cellular structure, the inner structure exhibits cellular αphase and needle-like martensiteα′ phase, these are resulting from the rapid solidification. After HIP, Ti6Al4V alloy has a Widmanstaten microstructure consisting of continuous grain boundary α(GBα)phase and β transformation structure, the grain size of GBα phase is in the range of 5~15μm . The tensile test at room temperature shows that strength of samples is 880MPa, the fracture surface exhibits obvious brittle cleavage fracture features including cleavage facets with river pattern and a few elongate dimples of different sizes and big voids at localized area.

Info:

Periodical:

Advanced Materials Research (Volumes 217-218)

Edited by:

Zhou Mark

Pages:

1336-1342

DOI:

10.4028/www.scientific.net/AMR.217-218.1336

Citation:

N. Liu et al., "Powder Metallurgical Processing of Ti6Al4V Alloy", Advanced Materials Research, Vols. 217-218, pp. 1336-1342, 2011

Online since:

March 2011

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Price:

$35.00

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