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Browsing by Subject "Investment casting"

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Alpha case formation mechanism in Ti-6Al-4V alloy investment castings using YFSZ shell moulds

Author: Bauristhene, AM ; Mutombo, K ; Stumpf, WE Date: Apr 2013 Ti-64, which accounts for more than 50% of the worldwide titanium tonnage, has found commercial importance in industries requiring components with high specific strength and resistance to corrosion. Investment casting is the preferred production ... Read more
Chemically milled alpha-case layer from Ti-6Al-4V alloy investment cast

Author: Mutombo, K ; Rossouw, P ; Govender, G Date: Jun 2011 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 ... Read more
Effect of pickling solution on the surface morphology of Ti6Al4V alloy investment cast

Author: Mutombo, K ; Rossouw, P Date: Oct 2011 Ti6Al4V alloy interacted with yttria fully stabilized zirconia face-coat to generate the alpha-case layer during the investment casting. The alpha-case mainly contained Al2O3, TiO2, TiO0.48, VO2, ZrO2 and Ti2ZrAl as revealed by the Energy ... Read more
Interaction between Yttria fully stabilized Zirconia or Yttria-Zirconia blended face-coat with Ti6Al4V during investment casting

Author: Mutombo, K ; Kgomo, C ; Rossouw, P Date: Oct 2014 The interaction between the Ti6Al4V alloy and the mould materials was investigated. The alpha-case was characterized by Vickers hardness tester, optical and scanning electron microscopy equipped with electron dispersive X-ray spectrometry ... Read more
Mechanical properties of mill-annealed Ti6Al4V investment cast

Author: Mutombo, K ; Rossouw, P ; Govender, G Date: Jul 2011 Ti6Al4V alloy, produced by investment casting using yttria stabilized zirconia, was machined and then mill-annealed in vacuum furnace. The ultimate strength, yield strength and percentage elongation were largely improved compared to the same ... Read more
Microstructural and mechanical properties investigation of Mg-Al-Zn alloy counter gravity investment cast

Author: Mutombo, K ; Rossouw, P ; Govender, G Date: Oct 2009 One of the most effective ways of improving the fuel consumption and hence reducing the environmental impact of transport vehicles is via reduction in mass. This has resulted in the increased use of magnesium (Mg) to reduce the mass of vehicles. ... Read more

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Browsing by Subject "Investment casting"

Browsing by Subject "Investment casting"

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