Various dislocation processes observed on b.c.c. metals and alloys during in situ straining experiments in a high voltage electron microscope, are reported at low and intermediate temperatures. Interaction of dislocations with forest or impurity obstacles and multiplication mechanisms are discussed, in the case of a high frictional lattice force on screws. Methods for quantitative analysis of recordings are developed.
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Louchet et al. (1979) studied this question.
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