one pound of aluminum, assuming that the cost of power is $0.01 K-W-H. What factor limits the ate at which aluminum is made in the hall cell? MA=27 Question No 23 Define the following terms a)Austemper b) Martemper d) Monotectic Reaction e) Rimmed steel h) Investment casting 1)Hall process DRoll process Question No. 24 Fe-0.6C-3%Mo are tempered. Include a comparison of hardness change ase of Fe-0.6%C and Describe and compare the processes that occur when the martensitic phase of Fe-0.6%C and Question No. 2 a) Define the discipline of mechanical metallurgy b) What is meant by a constitutive equation for a material? What is its form for a homogeneous isotropic body (elastic continuum) c) Why is the tensile strength so useful in testing materials? d) Explain in detail what material characteristics determine the energy absorbed in a notched-bar impact test. It measures chiefly what attribute of the material? What is meant by hardenability in steels? How is hardenability determined? What effects do the following have on hardenability and why a) Rate of cooling b) Austenite grain size c)Carbon content d) Cobalt addition e) Other alloy additions as chromium or nickel From mass spectrometry, the following data are obtained for the sulfur vapor species and their equilibrium vapor pressures over pure liquid sulfur Molecule P(473K)atm P(673K)Atm 14*10 9.40*10one pound of aluminum, assuming that the cost of power is $0.01 K-W-H. What factor limits the rate at which aluminum is made in the Hall cell? MAl = 27 1 pound = 454 gms Question No. 23 Define the following terms: a) Austemper b) Martemper c) Normalize d) Monotectic Reaction e) Rimmed Steel f) Luders bands g) Hot shortness h) Investment casting i) Hall process j) Kroll process Question No. 24 Describe and compare the processes that occur when the martensitic phase of Fe-0.6%C and Fe-0.6C-3%Mo are tempered. Include a comparison of hardness changes. Question No.25 a) Define the discipline of mechanical metallurgy. b) What is meant by a constitutive equation for a material? What is its form for a homogeneous isotropic body (elastic continuum). c) Why is the tensile strength so useful in testing materials? d) Explain in detail what material characteristics determine the energy absorbed in a notched-bar impact test. It measures chiefly what attribute of the material? Question No. 26 What is meant by hardenability in steels? How is hardenability determined? What effects do the following have on hardenability and why. a) Rate of cooling b) Austenite grain size c) Carbon content d) Cobalt addition e) Other alloy additions as chromium or nickel Question No. 27 From mass spectrometry, the following data are obtained for the sulfur vapor species and their equilibrium vapor pressures over pure liquid sulfur: Molecule P(473K)atm P(673K)atm S2 1.4*10-6 9.40*10-3