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

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 mic...

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Veröffentlicht in:	Materials science forum 2011-01, Vol.690, p.477-480
Hauptverfasser:	Mutombo, Kalenda, Govender, Gonasagren, Russouw, P.
Format:	Artikel
Sprache:	eng
Schlagworte:	Diffraction Hydrofluoric acid Nitric acid Pickled Pickling Titanium base alloys X-rays Yttria stabilized zirconia
Online-Zugang:	Volltext
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Beschreibung
Zusammenfassung:	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.
ISSN:	0255-5476 1662-9752 1662-9752
DOI:	10.4028/www.scientific.net/MSF.690.477