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Vacuum Investment Casting :
TITANIUM INVESTMENT CASTING uses lost-wax investment tooling to cast intricate shapes in titanium, zirconium and their alloys. A wax pattern is coated with a refractory slurry, dried and packed in a sand bed. The process resembles conventional lost wax investment casting, but is carried out in high vacuum to prevent oxygen pick-up by the metal. The process is more precise and allows greater shape-complexity than the alternative Rammed Graphite Casting, but it is also more expensive.
Recent refinements of the process and of the Hot Isostatic Pressing that is frequently applied to titanium castings to improve quality now allows the manufacture of critical engine and airframe components of military and commercial aircraft.
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an electric bulb weighing 15n hangs from a point C by 2 strings AC and BC .string AC is inclined at 60degree to horizontal and BC at 45 degree to vertical.find tension in string.
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Q. Define the concept of strain hardening. Ans. Strain hardening or work hardening in metal occurs because of interaction between the this location and some of obstruction.
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