Journal
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
Volume 45A, Issue 12, Pages 5613-5623Publisher
SPRINGER
DOI: 10.1007/s11661-014-2489-5
Keywords
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Funding
- JSPS KAKENHI [24560910, 24246124, 24226018]
- Royal Society Daiwa Anglo-Japanese Foundation International Exchanges Award
- ISIJ Innovative Program for Advanced Technology, ISIJ Research Promotion Grant
- EPSRC [EP/M002241/1, EP/K026763/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/K026763/1, EP/M002241/1] Funding Source: researchfish
- Grants-in-Aid for Scientific Research [24560910] Funding Source: KAKEN
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Synchrotron X-ray radiography at 125 frames per second was used to study deformation mechanisms in semi-solid Fe-C alloys at high solid fraction and shear strain rates of 10(-1)/s. An image correlation approach was also used to quantify the shear strain fields and study shear-induced dilation and the origin of shear cracking. It was shown that, at high solid fraction (90 to 93 pct solid), rearrangement including rotation and translation of solid particles became restricted and shear strain localized into narrow liquid-filled channels/fissures. Shear cracking was shown to originate from inadequate liquid flow into the expanding spaces between solid particles caused by shear-induced dilation. At lower solid fraction (similar to 85 pct solid), solid particles rearranged with a significantly higher component of rotation leading to more shear-induced dilation and a wider shear band.
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