کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1575511 1514748 2014 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
An investigation into the homogeneity of microstructure, strain pattern and hardness of pure aluminum processed by accumulative back extrusion
ترجمه فارسی عنوان
بررسی یکنواختی ریزساختار، الگوی کششی و سختی آلومینیوم خالص که توسط اکستروژن برگشت پذیر تجمع داده می شود
کلمات کلیدی
اکستروژن برگشتی انباشته، آلومینیوم، همگنی، میکرو سختی، ریز ساختار، تجزیه و تحلیل عنصر محدود،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
چکیده انگلیسی
The present work focuses on the evolution of microstructure and mechanical characteristics of commercially pure aluminum during accumulative back extrusion (ABE) processing. The electron backscatter diffraction (EBSD) analysis and microhardness measurements were utilized to study the effect of pass number and deformation route on the microstructure and hardness across the ABE-processed specimens. The distributions of effective strain and shear stress during ABE were studied using finite element analysis with DEFORMTM 3D software. The results demonstrated that an effective plastic strain of about 2 was introduced after each separate pass of ABE. This process produced a high-strength ultrafine-grained material where the grain refinement was attributed to the shearing and/or mechanical subdivision of the initial coarse grains along with dynamic restoration processes. The distributions of both the simulated strain and the measured microhardness were inhomogeneous after the first ABE pass, but thereafter outstanding hardness homogeneity was achieved when the consecutive ABE passes were applied. Moreover, the application of the reversing route was found to introduce a high level of hardness homogeneity after each applied ABE pass.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 595, 10 February 2014, Pages 179-187
نویسندگان
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