This research examines the basic mechanisms of time-dependent plasticity at elevated temperatures. Specifically, this research will assess the importance of dislocation heterogeneities (e.g. subgrain boundaries) on the mechanism of creep. Internal or "back" stress measurements are performed using convergent beam electron diffraction (CBED) measurements [at UCSD]. Anealasticity, possibly in association with internal backstresses, will be studied. Finally, fundamental relationships will be formulated to describe creep plasticity. Funding provided by Basic Energy Sciences of the Dept. of Energy.

Five-power-law creep in single phase metals and alloys

Taylor hardening in five-power-law creep of metals and Class M alloys

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