Repulsive coupled screw dislocation pairs cause work hardening in bcc metals
نویسندگان
چکیده
منابع مشابه
Screw dislocation mobility in BCC metals: the role of the compact core on double-kink nucleation
In this work, we examine the kink-nucleation process in BCC screw dislocations using atomistic simulation and transition pathway analysis, with a particular focus on the compact core structure. We observe the existence of a threshold stress, which results in an abrupt change in the minimum energy path of the kink-nucleation process, and hence, a discontinuity in the activation energy versus str...
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Plasticity in body-centred cubic (BCC) metals at low temperatures is atypical, marked in particular by an anisotropic elastic limit in clear violation of the famous Schmid law applicable to most other metals. This effect is known to originate from the behaviour of the screw dislocations; however, the underlying physics has so far remained insufficiently understood to predict plastic anisotropy ...
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ژورنال
عنوان ژورنال: Mrs Bulletin
سال: 2021
ISSN: ['1938-1425', '0883-7694']
DOI: https://doi.org/10.1557/s43577-021-00087-3