Figure 10.12 shows the results of Table 10.3 graphically. Between 0.3 T
m
and 0.5 T
m
there is a very large change in hardness. The strength also decreases
while the elongation increases. What is happening is that the metal is
recrystallizing.
100 r
80 l· ^^S.
ε
ω
\ \
1
40
L
\
| ,
300
1
1 i . * A
100 200 300 400 500
Temperature (°C)
400 500 600 700 800
Temperature (K)
1
,-L
1 1
*
600
i
900
0.3
T
m
0.4
T
m
0.5
T
m
0.6
7,
Figure 10.12 The effect of heat treatment on cold-worked copper
With
recrystallization
crystals begin to grow from nuclei in the most heavily
deformed parts of the metal. The temperature at whic ...
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