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Was it though? There's a strange depression around the crack, almost as if it's necked in...
I looked at that for a while and reserved judgement. We'd need to know if that necked in area was there from new, from previous service, or only when fitting the crank for the last time. In the end, the final fracture was brittle even if the events leading up to it were fatigue and/or plastic deformation.
gbj_tester
Was it though? There's a strange depression around the crack, almost as if it's necked in...
Hard to imagine that's actually the case though; doesn't seem right at all. Just a nasty forging?