Abstract
The microstructures of INCOLOY MA956 in the as-received condition and after hot tensile testing have been investigated by optical and transmission electron microscopy. The results of the structural analyses were correlated with the tensile properties in the temperature range 20–950°C. Significant changes in the deformation behaviour and the dislocation structures were observed as the test temperature was increased. Up to 400°C, strain hardening was observed and dislocation densities were correspondingly low. An attractive dislocation-particle interaction was seen, dislocations remaining in contact with the oxide dispersoid particles on the departure side of the particles.
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