Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 605, Issue -, Pages 98-107Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2014.03.037
Keywords
Residual stress relaxation; Texture; Crystal orientation; Vibratory stress relief technique; Electron backscatter diffraction
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Funding
- National Science Council Taiwan [NSC 102-2623-E-005-002-D]
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The textures and crystallographic orientations beneath the treatment area in AA 6061 aluminum alloy after vibratory stress relief (VSR) process were investigated by combining the electron backscatter diffraction analysis of the misoriented low- or high-angle boundaries, the (inverse) pole figures, the line scans and the various grain orientations. The relaxation effect caused by compressive residual stress in the intermediate region is superior to that of tensile residual stress on both sides of the cantilever by means of X-ray diffraction techniques. The residual stress relaxation that occurs due to vibrational stress excitation accompanies the orientation of banding disintegration, the decreases in the dislocation density, the strain energy, and the fraction of low-angle boundaries within each type of grain orientation, such as Copper {112} < 111 >, S {123} < 634 >, Goss {110} < 001 >, and Brass {110} < 112 >, excepting the Cube (or near-Cube) {100} < 001 > grain orientation. The maintained invariance in the Cube texture can be attributed to the maximum number of active primary slip systems, resulting in an interaction that results from hindered slip on intersecting families of the planes. (C) 2014 Elsevier B.V. All rights reserved.
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