Journal article
Comments on ''An alternative physical explanation of the Hall-Petch relation''
Bata and Pereloma describe a physical model that proposes to explain the Hall–Petch relationship. The model is based on an averaging process for the work required to emit a dislocation from a tilt boundary. The purpose of the present comment is to examine several assumptions at the heart of the proposed model.
Consideration is first directed at the fundamental premise that application of an average stress is sufficient to induce emission of a straight dislocation from a boundary, even though that stress is far below the stress required to overcome the highest energy barrier. The averaging process is also shown to emphasize the weak long-range interaction of the emitted dislocation with the original boundary, the consequences of which are considered.
Language: | English |
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Year: | 2004 |
Pages: | 1487-1490 |
ISSN: | 18728456 and 13596462 |
Types: | Journal article |
DOI: | 10.1016/j.scriptamat.2004.02.017 |