  The effect of crystallography on transgranular chloride-induced stress
corrosion cracking (TGCISCC) of arc welded 304L austenitic stainless steel is
studied on >300 grains along crack paths. Schmid and Taylor factor mismatches
across grain boundaries (GBs) reveal that cracks propagate either from a hard
to soft grain, which can be explained merely by mechanical arguments, or soft
to hard grain. In the latter case, finite element analysis reveals that TGCISCC
will arrest at GBs without sufficient mechanical stress, favorable
crystallographic orientations, or crack tip corrosion. GB type does not play a
significant role in determining TGCISCC cracking behavior nor susceptibility.
TGCISCC crack behaviors at GBs are discussed in the context of the competition
between mechanical, crystallographic, and corrosion factors.
