Question

7. The phase diagram for an alloy with two eutectic reactions is shown below. Two intermetallic line compounds are found in this system, labeled as CuzP and CuP2. a) Label all phase fields and lines on the phase diagram below (1/2 point per label) (8). b) This alloy can be precipitation hardened. Assuming Cu-rich phases are ductile, and the intermetallic phases (CuzP, CuP2) are brittle. Specify a composition range suitable for precipitation hardening of this alloy (3). to wt% P 1100 1000 900 1833°C 800 32 714°C 700 %3D 1.7 8.3 (a-Cu) 600 500 400 300 200 50 30 10 20 40 Cu CusP CUP2

Answer 1

lg No-U Solution - Given data; - phase Diagram for An alloy with two Eutectic Reaction is shown Below → Two interme tallic line compounds are found in this system, labeled as cusp and cuk. A). Label All phase Fields and lines on the phase diagram Below 3 - 11007 Housse 70071 3:3 +Cup 0012 TO 18 500 20 22 w+t/P- p>

. & No - B). This alloy can be precipitation Hardened, Assuming cu- rich phases are ductile, and the intermetallic phases (cuzp, Culo) Are Are brittle rases (Cuzp, Cule) Specify: - The Ro Composition Range Suitable for Precipitation Hardending of this alloy from the figure it is clear from 0.2 to 1.7 wtopp! 0. Y Tom LO