EBSD characterization of repetitive grain refinement in AZ31 magnesium alloy
A polycrystalline Mg-3Al-1Zn was subjected to high plastic strains by applying accumulative back extrusion (ABE) process. Electron back scatter diffraction analyses were used to explore the grain refinement mechanisms. A novel grain refinement trend was found at large strains, where new recrystalliz...
| Authors: | , , , |
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| Format: | article |
| Publication Date: | 2015 |
| Country: | España |
| Institution: | Universitat Politècnica de Catalunya (UPC) |
| Repository: | UPCommons. Portal del coneixement obert de la UPC |
| Language: | English |
| OAI Identifier: | oai:upcommons.upc.edu:2117/26582 |
| Online Access: | https://hdl.handle.net/2117/26582 https://dx.doi.org/10.1016/j.matchemphys.2014.10.026 |
| Access Level: | Open access |
| Keyword: | Magnesium alloys Recrystallization Microstructure Deformation Electron diffraction Continuous Dynamic Recrystallitation Severe Plastic-Deformation MG Alloy Microstructural Evolution Mechanical-Properties Model Aluminium Size ZK60 Magnesi -- Aliatges Àrees temàtiques de la UPC::Enginyeria dels materials |
| Summary: | A polycrystalline Mg-3Al-1Zn was subjected to high plastic strains by applying accumulative back extrusion (ABE) process. Electron back scatter diffraction analyses were used to explore the grain refinement mechanisms. A novel grain refinement trend was found at large strains, where new recrystallized grains were repetitively refined through dynamic recrystallization. The grain size was diminishing continuously up to the fourth ABE pass, after which no further grain refinement was noticed upon successive passes. (C) 2014 Elsevier B.V. All rights reserved. |
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