welded joint or HAZ. From our results, we can see that the fracture behaviour of the Ti-alloy is affeted by the welding process and also by the crack orientation. These effects are not negligible for engineering applications. Because of space limitations, a further analysis and discussion will be conducted in a follow up paper. Figure 4: J vs a of base metal plate(L-T) Figure 5: J vs a of base metal plate(L-S) Figure 6: J vs a of HAZ plate(L-T) Figure 7: J vs a of welded joint plate(L-T)
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