Crack Paths 2012

In Fig. 3a, It is seen that the sizes of the E R 309L grains are smaller than the

sizes of the AISI 304 grains. Fig. 3b shows the diffusion of the elements of chromium,

nickel, iron, and manganesebetweenthe 1 7 M n 4and E R 309L. While iron diffused

from 1 7 M n 4to E R309L, chromiumand nickel diffused fromE R309Lto l7Mn4.

H A R D N E S S V I C K E R S

{ H R / Q 7 1 }

L

* 3 5 : 2 1 a m

. .

1

s a u n a :

. _

1 & 54'

E .

J

I

Q fi - E L D E E I

$ 1 M ‘ ? 2...

E 3 R0 9 1 ; .

_ ‘ A I S3I 0 4 -15|:|£IJ|:|

1 714114

1mreicl M e t a l

I ‘3:11:00

513.1107)

0

- 2 0 - 15

--'I 0

" a

0 '

4

1 0

'I 5

2 0

D i s t a l6: l( c1 1 m m )

Fig. 2. Vickers micro-hardness distribution.

Base Metal 17Mn4

z

5

Weld Meta] E RSDDL

90

an

Fe

70 so

I

1' 1

$50

£140 £30

C!

no

Ni m i m w m t i i w m w m m

.

..

1'1" W111i‘.a-..

10

Mn

0.4

0.3

1 .2

1.5

2.0

2.4

2.3

3.2

3.5

4.0

Distance (mm)

Fig. 3. (a)Transition region between A181 304 and E R309L. (b) Distribution of Cr, Ni,

Fe, andM nbetween1 7 M n 4and E R309L.

937