کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9796054 | 1514940 | 2005 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Determination of the radial crystallite microstrain distribution within an AlMg3 torsion sample using monochromatic synchrotron radiation
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
A solid torsion sample made from AlMg3 (single phase Al alloy with 3 wt.% Mg) is strongly plastically deformed in three steps of Îγ1 = 1.5, Îγ2 = 1, and Îγ3 = 1 to a total deformation of γ = 3.5. The low speed deformation is carried out at room temperature with free ends. After each deformation step, the residual strain and texture within the sample are characterized non-destructively by a three-dimensional diffraction technique using monochromatic high energy synchrotron radiation. The macrostrain tensor is determined as a function of the radial position and the deformation by fitting the distortion of complete diffraction rings. Systematic deviations of the {h k l} specific diffraction ring distortions from the fit are interpreted as crystallite microstrains. These strains are in the order of (480-1550) Ã 10â6. A comparison to results from crystallite microstrain measurements on uni- and bi-axially deformed samples shows that particularly the Al {2 2 0} reflection exhibits dramatically higher crystallite microstrains for tri-axial deformation obtained by solid torsion. This proves that crystallite microstrains cannot be neglected when deformations are bi- or tri-axial. In the deformation-dependent texture development, an increasing dominance of ideal torsion texture orientation A1* over A2* is observed. No evidence is found for ideal orientation B.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 402, Issues 1â2, 15 August 2005, Pages 278-287
Journal: Materials Science and Engineering: A - Volume 402, Issues 1â2, 15 August 2005, Pages 278-287
نویسندگان
R.V. Martins, U. Lienert, L. Margulies, A. Pyzalla,