Fatigue Crack Paths 2003

1 2

1 0

[ m

8

ept h

6

d

c r a c k

4

2

0

0

5

1 0 1 5 2 0 2 5

s u r f a c es e mi-axes[m m ]

Figure 8.

Cyclic Tension Surface Crack Shapes ( Base Metal ).

1 2

1 0

[ m

8

ept h

6

d

c r a c k

4

2

0

0

5

1 0

1 5

2 0

2 5

s u r f a csee mi - a x e [sm m ]

Figure 9. Cyclic Tension Surface Crack Shapes ( Weld Metal).

1 2

1 0

c r a c k d e p t h [ m m

8

6

4

2

0

0

5

1 0

1 5

2 0

2 5

3 0

3 5

s u r f ac e s e m i - ax e s [ m m ]

Figure 10. Cyclic Tension Surface Crack Shapes

( Crack Growth from Bond Line into Base and Weld Metals, As Welded).

1 2

1 0

[ m

8

c r a c k d e p t h

6

4

2

0

0

5

1 0

1 5

2 0

2 5

3 0

3 5

s u r f as ce emi - a x [em sm ]

Figure 11. Cyclic Tension Surface Crack Growth Shapes

( Crack Growth from BondLine into Base and Weld Metals, after H T).