Quantification of deformation microstructure at ultra-low tensile strain in pure Al prepared by spark plasma sintering

[摘要] A sample of Al with grain size of 5.1 μm, prepared by spark plasma sintering, was deformed to a nominal strain of 0.35% under exposure to X-ray synchrotron radiation, allowing spatially resolved orientation measurements to be made during loading by use of a micro-diffraction technique. A significant heterogeneity in the deformation pattern between grains was observed. A statistical analysis shows that grain deformation depends more on crystallographic orientation than on grain size, with grains with tensile axis lying towards the - border of the unit triangle tending to undergo larger deformation. Other possible reasons for the different deformation behaviour between individual grains are briefly discussed.

[发布机构] Key Laboratory of Advanced Materials (MOE), School of Materials Science and Engineering, Tsinghua University, Beijing; 100084, China^1;Section for Materials Science and Advanced Characterization, Department of Wind Energy, Technical University of Denmark, Riso Campus, Roskilde; 4000, Denmark^2;College of Materials Science and Engineering, Chongqing University, Chongqing; 400045, China^3;Advanced Photon Source, Argonne National Laboratory, Argonne; IL; 60439, United States^4

[关键词] Crystallographic orientations;Deformation behaviour;Deformation microstructure;Deformation pattern;Diffraction techniques;Larger deformations;Orientation measurements;X-ray synchrotron radiation