1. Calculate the volume percentage of phase present in an alloy of 16% by weight silicon...

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1. Calculate the volume percentage of phase present in an alloy of 16% by weight silicon and 84% by weight aluminium Given density of Si= 2.35 gm/cc and density of aluminium = 2,7 gm/cc. 2. What is the fraction of proeutectoid cementite in a (a) 1.4% C (b) 1.0% C (c) 0.7% C steels? 3. Two specimens of an Fe-3% Silicon-alloy, having grain sizes of ASTM 1 and 8 respectively, yield at 118 and 207 MNm2. Calculate the yield strength of a single crystal of the alloy. 4. A cylindrical piece of 8660 steel is to be austenitised and quenched in moderately agitated oil. If the hardness at the surface of the piece must be at least 50 HRC. Determine the maximum allowable diameter. 5. Tension test was conducted on a specimen and the following readings were recorded. Diameter - 25 mm Gauge length of extensometer = 200 mm Least count of extensometer = 0.001 mm At a load of 30 kN, extensometer reading 60 At a load of 50 kN, extensometer reading = 100 Yield load = 160 KN Maximum load = 205 KN Diameter neck = 17 mm Final extension over 125 mm original length: 150 mm Find Young's Modulus, yield stress, ultimate stress, percentage elongation and percentage reduction in area. 1. Calculate the volume percentage of phase present in an alloy of 16% by weight silicon and 84% by weight aluminium Given density of Si= 2.35 gm/cc and density of aluminium = 2,7 gm/cc. 2. What is the fraction of proeutectoid cementite in a (a) 1.4% C (b) 1.0% C (c) 0.7% C steels? 3. Two specimens of an Fe-3% Silicon-alloy, having grain sizes of ASTM 1 and 8 respectively, yield at 118 and 207 MNm2. Calculate the yield strength of a single crystal of the alloy. 4. A cylindrical piece of 8660 steel is to be austenitised and quenched in moderately agitated oil. If the hardness at the surface of the piece must be at least 50 HRC. Determine the maximum allowable diameter. 5. Tension test was conducted on a specimen and the following readings were recorded. Diameter - 25 mm Gauge length of extensometer = 200 mm Least count of extensometer = 0.001 mm At a load of 30 kN, extensometer reading 60 At a load of 50 kN, extensometer reading = 100 Yield load = 160 KN Maximum load = 205 KN Diameter neck = 17 mm Final extension over 125 mm original length: 150 mm Find Young's Modulus, yield stress, ultimate stress, percentage elongation and percentage reduction in area.

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