Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 558, Issue -, Pages 59-63Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2012.07.066
Keywords
Activation energy; Ball milling; Bulk modulus; Hardness; High-pressure torsion; Minimum grain size; Nanocrystalline materials; Recovery; Stacking fault energy
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Funding
- US National Science Foundation [DMR-0702978]
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Recently, a dislocation model that quantitatively relates the minimum grain size obtainable by ball milling, d(min), to several physical parameters, such as the activation energy for self-diffusion and the stacking fault energy, in a nanocrystalline (nc) material was developed. In this paper, it is shown that the predictions of the model are consistent with the characteristics of the minimum grain size, d(min), obtainable in FCC and BCC metals by high-pressure torsion. Such a consistency indicates that the dislocation model for ball milling is quantitatively applicable to the description of other severe plastic deformation (SPD) processes. (C) 2012 Elsevier B.V. All rights reserved.
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