期刊
ACTA MATERIALIA
卷 61, 期 11, 页码 4169-4179出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.actamat.2013.03.043
关键词
Casting; Solidification; Synchrotron radiation; Granular materials; Soil mechanics
资金
- EPSRC [EP/H016848/1]
- RAEng/EPSRC [EP/F050682/1]
- EPSRC strategic Support Fund at Imperial College
- Royal Society Daiwa Anglo-Japanese Foundation International Exchanges Award
- Grants-in-Aid for Scientific Research [24560910] Funding Source: KAKEN
- Engineering and Physical Sciences Research Council [EP/K026763/1, EP/J018201/1, EP/H016848/1] Funding Source: researchfish
- EPSRC [EP/K026763/1, EP/H016848/1, EP/J018201/1] Funding Source: UKRI
The granular micromechanics of semi-solid steel a similar to 80% solid are studied by synchrotron radiography. A particulate soil mechanics approach to image analysis shows that deformation occurs by the translation and rotation of quasi-rigid grains under the action of contact forces, and that the changes in directional fabric and grain grain contacts occur by mechanisms similar to those of highly compacted soils including locked sands. Grain-scale phenomena are then linked to the macroscopic displacement and strain fields and it is shown that shear-induced dilation is a fundamental response at both the grain and macro scales. Based on this, recommendations are made on future rheology experiments. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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