practi duction quantities. Which option(s) would you NOT recommend? Select one or more: Da. Hot rolling b. Cold rolling Dc. Powder metallurgy Od. Forging e. Sand casting Of. Investment casting to be produced large

Question No. 4: (20 points) Fill the empty boxes and describe the investment casting process (steps, advantages). Open riser Vent Flask Blind riser Core Sand (sand) - Choke Parting line Gate -Mold- cavity Well Sand

In turbine blade casting, how is a single-crystal structure achieved?   Select one or more: a. By using a curving coil-like channel in the casting mould b. By removing grain boundaries by hot working and recrystallisation c. By careful control of the temperatures of the mould d. By introducing impurities into the molten alloy in the mould