Effects of free surface and heterogeneous residual internal stress on stress-driven grain growth in nanocrystalline metals
- By reevaluating the experimental study of Zhang et al. (2005), here we demonstrate that the extent of grain growth, previously proposed to be solely driven by external stress, may have been significantly overestimated. A new physical mechanism, termed as free surface assisted stress-driven grain growth (or self-mechanical annealing), is proposed and discussed in detail. Representing the cooperative effect of free surface and heterogeneous residual internal stress, the proposed mechanism is consideredmore favorable than the traditional pure stress-driven mechanism for interpreting the abnormal grain growth widely observed in deforming nanocrystalline metals at room temperature.
| Document Type: | Article |
|---|---|
| Author: | F. Wang, J. Zhao, P. Huang, Andreas S. Schneider, T. J. Lu, K. W. Xu |
| URN: | urn:nbn:de:bsz:291:415-4840 |
| DOI: | https://doi.org/10.1155/2013/934986 |
| ISSN: | 1687-4110 |
| Parent Title (English): | Journal of Nanomaterials |
| Volume: | 2013 |
| First Page: | 934986 |
| Language: | English |
| Year of first Publication: | 2013 |
| Release Date: | 2022/11/18 |
| Impact: | 01.611 (2013) |
| Funding Information: | National Basic Research Program of China (2010CB631002, 2011CB610306,), the National Natural Science Foundation of China (51171141, 50701034), Program for New Century Excellent Talents in University (NCET-11-0431), Research Fund for the Doctoral Program of Higher Education of China (20120201110001), and the Fundamental Research Funds for the Central Universities. |
| Researchfields: | Grenzflächenmaterialien |
| Open Access: | Open Access |
| Signature: | INM 2013/106 |
| Licence (German): |  Creative Commons - CC BY - Namensnennung 4.0 International |
