TEM in situ straining experiments in Fe at low temperature |
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Authors: | D. Caillard |
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Affiliation: | 1. CEMES, CNRS , Toulouse, France caillard@cemes.fr |
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Abstract: | In situ transmission electron microscopy straining experiments were carried out in pure Fe to investigate the origin of the discontinuity observed at 250 K in the temperature variation of the deformation activation parameters. The results show that the motion of screw dislocations is steady at 300 K, in agreement with a kink-pair mechanism, but jerky at 110 K. This change has been attributed to a transition from a kink-pair mechanism to a locking–unlocking mechanism, similar to that observed previously in Ti. |
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Keywords: | Fe dislocation dynamics electron microscopy |
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