کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1580251 1514834 2009 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
On nucleation and propagation of PLC bands in an Al-3Mg alloy
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
On nucleation and propagation of PLC bands in an Al-3Mg alloy
چکیده انگلیسی
The processes of nucleation and propagation of Portevin-LeChatelier deformation bands during tensile deformation of the alloy AA5754 have been investigated by a special optical technique for local strain measurements, combining both a line-scan and a CMOS camera to record the changes of surface strain, applying digital image correlation. Examples for bands of types A and B are observed and discussed with respect to the micro-mechanisms of their nucleation and propagation, emphasizing local stress concentrations in addition to the well-known effects of dynamic strain aging and dislocation interactions for explaining the PLC behavior. Finally the nucleation and propagation of PLC bands are simulated by computations based on a simple constitutive model.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 527, Issues 1–2, 15 December 2009, Pages 132-140
نویسندگان
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