Fractographs furnish experimental support for cleavage fracture model

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'B A

l

I

-

I

.C

300-~ Stee~ (880o C)

.

"~50

a

.

25 -

.

Temp, ~ B C D E

o

900

.

.

.

Temp,*C

50 I00 150 200

G H [

Temp,,~

274 298 320 346

d

1800 Time (sec)

KL

L M N 0

400 425 4.52 500

2700

M

3600

(a) IO2

. . . . . . . . . . .

o_

I01

I02

I03

I0 4

Time (sec)

(h)

Fig. 6--(a) Percent transformed us time for 300-M austenitized at 880~ (b) Log percent transformed vs log time for 300-M austenitized at 880~ I to

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