Crack Paths 2009

towards an elliptical shape perpendicular to the FS weld (a = 10 mm). Outside the

nugget, the contour shows again a butterfly shape with a strong orientation parallel to

the FS weld.

tio n Material flows

c

in Nugget

ir e

d

g

in

ld

e

W

e

a=7.5mm

g

d

e

l

o

o

T

a = 2 0 m m

a = 5 m m

a = 1 0 m m

e

t r

n

e

c

a = 1 5 m m

a = 1 3 m m

ld

We

Crack path

Figure 3, Contour plots FS welded AA7075-T6;45º configuration, front side FS weld

A

B

Speckle pattern

for DIC

Material flows inNugget

Weldin g d

a = 7 . 5 m m

a = 2 0 m m

Weldcentre

ire ction

Crack path

We ldc

entr

e

To

Crack path

a = 1 0 m ma = 1 3 m m a = 1 5 m

a = 5 m m

ole

dg

e

Notch and sawcut

Figure 4, A: Contour plots FS welded AA7075-T6; 45º configuration; back side FS

weld, B: image of specimen with crack path

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