Revealing texture architecture in a surface gradient nanostructured Al-Cu-Mg alloy |
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| Authors: | Zongqiang Feng Yanxia Chen Wei Zhang |
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| Institution: | 1. International Joint Laboratory for Light Alloys (Ministry of Education), College of Materials Science and Engineering, Chongqing University, Chongqing, People’s Republic of China;2. Electron Microscopy Center of Chongqing University, Chongqing, People’s Republic of Chinazqfeng@cqu.edu.cn;4. Faculty of Materials and Energy, Southwest University, Chongqing, People’s Republic of China;5. Northwest Institute for Nonferrous Metal Research, Xi'an, People’s Republic of China |
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| Abstract: | ABSTRACTA multiscale crystallographic texture architecture in a surface gradient nanostructured Al-Cu-Mg alloy after surface sliding friction treatment (SSFT) has been revealed by a combination of electron backscatter diffraction and precession electron diffraction (PED)-assisted transmission electron microscopy (TEM) orientation mapping. Accompanying a grain structure variation from lamellar coarse grains to equiaxed nanograins, the major texture components evolve from brass {110}<112> in the coarse-grain matrix, Goss {110}<001> at a depth of ～80?μm, E {111}<011> and F {111}<112> at a depth of ～20?μm, to a mixture of rotated cube {001}<110>, E and F in the topmost surface layer. The through-thickness textural development and evolution are attributed to the cyclic loading of concurrent shear and compression during the SSFT processing. The PED-assisted orientation mapping shows good capability in mapping severe plastic-deformation-induced nanostructures with large residual strains and high defect density. |
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| Keywords: | Aluminum alloys surface plastic deformation gradient nanostructures textures nanoscale orientation mapping |
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