Serrated grain boundary formation during high temperature fatigue

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The preparation o f this D i s c u s s i o n was supported through a grant from the National S c i e n c e F o u n d a t i o n to the C M U C e n t e r for the Study o f Materials through Grant D M R - 8 1 19507. Appreciation is expressed to Dr. David A. Smith of the I B M T . J . Watson Research C e n t e r for valuable discussions and suggestions, and to Dr. K . B . A l e x a n d e r for providing F i g u r e 1 and Mr. G. Spanos for furnishing Figure 2.

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