In situ transmission electron microscopy of the interaction between a moving dislocation and obstacles of dislocation character in pure iron

In this study, we report our observation of the interaction between a moving dislocation and an obstacle of dislocation character in pure bcc-Fe using a TEM in situ straining experiment at room temperature. Our observations reveal that the interaction of a 1/2111 dislocation with a dislocation debris leads to a dislocation loop at the obstacle by Orowan mechanism. Hence, the strength of these obstacles is estimated to be in the range of Gb/L, which is higher than the strengthening induced by different nanometric defects of similar size.


Published in:
Philosophical Magazine Letters, 93, 10, 575-582
Year:
2013
Publisher:
Abingdon, Taylor & Francis Ltd
ISSN:
0950-0839
Keywords:
Laboratories:
SPC
CRPP




 Record created 2013-11-04, last modified 2018-01-28


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