Meeting with Brad Boyce

Abnormal Grain Growth

Context: dislocations don’t necessarily pile up at the grain boundary, they can still be generated and emitted there

Main finding of presentation: strain coarsening combined with thermal (creep) did not change the mechanism of fatigue, it simply increased coarsening. They still kept to the linear log time plot.

Main finding of paper: Abnormal grain growth precedes crack initiation in fatigue tested samples. “NC metals don’t experience fatigue, they just grow until they’re not NC anymore, and then experience fatigue.” *First* time done with in situ TEM.

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