Chemically Milled Alpha-Case Layer from Ti-6Al-4V Alloy Investment Cast

Abstract:

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The as cast Ti6Al4V, obtained after investment casting with yttria stabilized zirconia face-coat, was chemically milled using a mixture of hydrofluoric acid and nitric acid. This process removed completely the alpha-case layer. Lower hardness and almost no oxygen contamination are revealed after microhardness measurement, Energy dispersive X-ray and X-ray diffraction analysis. The hydrofluoric acid/nitric acid ratio, pickled Ti6Al4V surface, pickling efficiency, pickling rate, immersion time and solution temperature are discussed.

Info:

Periodical:

Edited by:

Hajo Dieringa, Norbert Hort and Karl Ulrich Kainer

Pages:

477-480

DOI:

10.4028/www.scientific.net/MSF.690.477

Citation:

K. Mutombo et al., "Chemically Milled Alpha-Case Layer from Ti-6Al-4V Alloy Investment Cast", Materials Science Forum, Vol. 690, pp. 477-480, 2011

Online since:

June 2011

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Price:

$35.00

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