Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 677, Issue -, Pages 68-75Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2016.09.005
Keywords
Magnesium; Alloying; Deformation twinning; Grain refinement; Deformation bands
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Funding
- Program for New Century Excellent Talents in University from Chinese Ministry of Education
- National Natural Science Foundation of China [51225102, 2012CB932203]
- Russian Ministry of Education and Science [14. B25.31.0017]
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Different with common grain refinement dominated by dislocation activities, grain subdivision induced by sequential activation of multiple twinning was observed in a Mg-Gd-Y-Zr magnesium alloy via high-pressure torsion. Deformation bands were evolved from large primary twin bands, which contained refined grains through localized multiple twinning. Nanometer-scaled amorphous bands were also observed within deformation bands in Mg alloys for the first time. These observations indicate that localized deformation via multiple twinning and the consequent formation of deformation bands are potential routes to grain refinement in rare earth-magnesium alloys. (C) 2016 Elsevier B.V. All rights reserved.
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