Residual stress distribution of a 6061-T6 aluminum alloy under shear deformation

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

卷:670

Article

Reyes-Ruiz, C.¹  Figueroa, I. A.¹  Braham, C.²  Cabrera, J. M.^3,4  Zanellato, O.²  Baiz, S.²  Gonzalez, G.¹ 

[1] Univ Nacl Autonoma Mexico, Inst Invest Mat, Circuito Exterior S-N,Cd Univ,AP 70-360, Coyoacan 04510, DF, Mexico

[2] ENSAM CNAM, CNRS UMR 8006, Lab Proc & Ingn Mecan & Mat, 151 Bd Hop, F-75013 Paris, France

[3] Univ Politecn Cataluna, ETSEIB, Dept Ciencia Mat & Ingn Met, Av Diagonal 647, E-08028 Barcelona, Spain

[4] Fundacio CTM Ctr Tecnol, Pl Ciencia 2, Manresa 08243, Spain

关键词: Synchrotron X-ray diffraction;    Aluminum alloys;    Equal channel angular processing;    Residual stresses;   

DOI  :  10.1016/j.msea.2016.06.016

来源: Elsevier

【 摘 要 】

There is a lack of information with regards to the friction effect in ECAPed aluminum alloys, even though it might substantially modify the deformation at the surface. In this work, the friction effect at the surface and the deformation heterogeneity in the ECAPed aluminum alloy 6061-T6 were characterized. X-Ray diffraction was used to determine residual stresses (RS) on the sample surface. The volumetric sections were characterized by Synchrotron diffraction at ESRF beamline ID15B (Grenoble, France). It was found that the microhardness mapping and residual stress results showed a good agreement with the finite element analysis for the first layer studied. Minor strain variation, Delta d/d as a function of (hkl) planes, for the different analyzed sections was found. The study also showed that there was an incomplete symmetry in the residual stress near the surface, even at up to a depth of 400 gm. The regions with higher deformation were found to be at the top and bottom parts of the sample, while the central region showed stress variations of up to 50 MPa. (C) 2016 Elsevier B.V. All rights reserved.

【 授权许可】

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