Significantly enhanced crack blunting by nanograin rotation in nanocrystalline materials
Scripta Materialia, ISSN: 1359-6462, Vol: 151, Page: 19-23
2018
- 5Citations
- 11Captures
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Article Description
Experiments have shown that stress-driven grain growth is closely related to the enhanced crack growth resistance and the exceptional tensile ductility as observed in several nano-metals. However, the quantitative correlation remains unsolved. Here we developed a theoretical model to investigate the effect of nanograin rotation, one of the main modes of stress-driven grain growth, on dislocation emission from the tip of a semi-infinite crack in a nanograined solid. Our findings show that the nanograin rotation can significantly enhance the capability of the crack to emit dislocations, thus leading to strong crack blunting in nanomaterials.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S1359646218301829; http://dx.doi.org/10.1016/j.scriptamat.2018.03.030; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85044571685&origin=inward; https://linkinghub.elsevier.com/retrieve/pii/S1359646218301829; https://dx.doi.org/10.1016/j.scriptamat.2018.03.030
Elsevier BV
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