King Saud University College of Engineering Chemical Engineering Department Introduction to Materials Science and Engineering (219CHE) (Class work) Q-1 A 65 wt\% Ni35 wt % Cu alloy is heated to a temperature within the at liquid-phase region. If the composition of the a phase is 70wt%Ni, determine: (Class work) (a) The temperature of the alloy (b) The composition of the liquid phase (c) The mass fractions of both phases Q-2 A lead-tin alloy of composition 30wt%Sn70wt%Pb is slowly heated from a temperature of ( 150C ). (Class work) (a) At what temperature does the first liquid phase form? (b) What is the composition of this liquid phase? (c) At what temperature does complete melting of the alloy occur? (d) What is the composition of the last solid remaining prior to complete melting? Q-3 A 40wt%Pb60wt%Mg alloy is heated to a temperature within the + liquid-phase region. If the mass fraction of each phase is 0.5, then estimate: (Class work) (a) The temperature of the alloy? (b) The compositions of the two phases? Q-4 PbSn alloy contains 60% and 40% at 150C. Determine the composition of the alloy.? (Class work) 6:10 PM Sun 29 Jan AA Ims.ksu.edu.sa is 804cos12 tha b-aldec