کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1636676 1516957 2015 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Simple physically-based constitutive equations for hot deformation of 2024 and 7075 aluminum alloys
ترجمه فارسی عنوان
معادلات ساختاری مبتنی بر فیزیکی ساده برای تغییر شکل گرمایی آلومینیوم های 2024 و 7075
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
چکیده انگلیسی

The hot working behaviors of 2024 and 7075 aluminum alloys were studied through constitutive analysis based on a physically-based approach which accounts for the dependence of the elastic modulus and the self-diffusion coefficient of aluminum on temperature. It was demonstrated that the lattice self-diffusion activation energy of aluminum (142 kJ/mol) can be used in the Zener–Hollomon parameter's formula as the deformation activation energy and the theoretical exponent of 5 can be set in the modified hyperbolic sine law to describe the peak flow stresses. By consideration of physically-based material's parameters, it was possible to conduct a comparative study on the hot flow stress of 2024 and 7075 aluminum alloys. It was concluded that the used approach in the current work can be considered as a versatile tool in future comparative hot working studies, especially in studies dedicated to alloy development.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Transactions of Nonferrous Metals Society of China - Volume 25, Issue 5, May 2015, Pages 1614-1618