2.Using the Al-Cu phase diagram shown below,please answer the following questions for each temperature and composition (Lecture 14.2, Callister 9).
(i) What phases are present, e.g. L, a, ... etc. ? (ii) What is the composition of each phase,e.g.wt% of Al and wt% of Cu?
(iii How much of each phase is present, e.g. % L, % a, etc.?
(iv) Draw a sketch of the equilibrium microstructure.
(a) 33.2 wt% Cu at 456 C
700 660C
(b) 5 wt% Cu at 600 C
L+E2
: L 600 L+a Temperature, 5.65 548'C 33.2 500 + 400
(c) 2.5 wt% Cu at 400 C
L+n1
L+e 4
d) 45 wt%Cu at 400c
52.5
e+n1
e)40 wt% Cu at 700 c
0+n2
f)2.5 wt% Cu at 600C
300 0 Al 100%
1
10
20
30
40
50
60
70
Wt % Copper