کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5455626 1514644 2017 19 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A physical-based constitutive model to describe the strain-hardening and dynamic recovery behaviors of 5754 aluminum alloy
ترجمه فارسی عنوان
یک مدل سازنده مبتنی بر فیزیکی برای توصیف رفتارهای مقاوم شدن و رفتار دینامیکی 5754 آلیاژ آلومینیوم
کلمات کلیدی
5754 آلیاژ آلومینیوم، فشار هوا فشرده سازی هوا، بازیابی دینامیک، تکامل میکرو سازگار، مدل سازمانی،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
چکیده انگلیسی
Plane strain hot compression tests of 5754 aluminum alloy were conducted on a Gleeble-3500 thermo-mechanical simulator under various conditions. These tests simulated flat rolling to investigate how hardening and softening behaviors respond to controlled parameters, such as the deformation temperature and strain rate. This data allowed the parameters for the hot rolling process to be optimized. The restoration mechanism primarily proceeds via dynamic recovery, as shown by the deformed microstructure analysis and strain-stress curves. The dislocation density was used as internal state variable to develop a physical constitutive model, which characterized the evolution of the dislocation density caused by strain-hardening and dynamic recovery behaviors. The relationship between the flow stress and the dislocation density could be quantified with this model. The strain-hardening and softening behavior was analyzed in detail by Kocks-Mecking type plots. Furthermore, the relevant material coefficients were expressed as functions related to the temperature and the strain rate. The experimental flow stress was found to be in close agreement with the calculated, which confirms that the model developed herein can represent the flow behaviors of the 5754 aluminum alloy effectively.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 699, 24 June 2017, Pages 106-113
نویسندگان
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