Journal
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
Volume 373, Issue 2038, Pages -Publisher
ROYAL SOC
DOI: 10.1098/rsta.2014.0366
Keywords
severe plastic deformation; high-pressure torsion; nanocrystalline; ultrafine-grained; fracture toughness; anisotropy
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Funding
- Austrian Science Fund (FWF) [P26729-N19]
- European Research Council under ERC [340185 USMS]
- Austrian Science Fund (FWF) [P26729] Funding Source: Austrian Science Fund (FWF)
- Austrian Science Fund (FWF) [P 24141] Funding Source: researchfish
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The knowledge of the fracture of bulk metallic materials developed in the last 50 years is mostly based on materials having grain sizes, d, in the range of some micrometres up to several hundred micrometres regarding the possibilities of classical metallurgical methods. Nowadays, novel techniques provide access to much smaller grain sizes, where severe plastic deformation (SPD) is one of the most significant techniques. This opens the door to extend basic research in fracture mechanics to the nanocrystalline (NC) grain size regime. From the technological point of view, there is also the necessity to evaluate standard fracture mechanics data of these new materials, such as the fracture toughness, in order to allow their implementation in engineering applications. Here, an overview of recent results on the fracture behaviour of several different ultrafine-grained (d < 1 mu m) and NC (d < 100 nm) metals and alloys covering examples of body-and face-centred cubic structures produced by SPD will be given.
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