Abstract
Temperature dependence of the yield stress for Ni3Ge single crystals is investigated. Positive temperature dependence of the critical yield stress in the high-temperature region (above 420 K) is attributed to a thermally activated accumulation of a high nonscrew-superdislocation density. The mechanism of interaction of point defects with superdislocations and its contribution to the temperature anomaly is examined. Correlation is found between the calculated contribution from point defects and the observed increase in the critical yield stress with the test temperature.
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