Mechanical and Microstructural Evaluation of Recycled AA۷۰۷۵ Swarf
Publish Year: 1402
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_IJMSEI-20-3_001
تاریخ نمایه سازی: 11 شهریور 1402
Abstract:
In this research, after pressing in a cylindrical mold, the AA ۷۰۷۵ alloy swarf was melted and cast in a wet sand mold. After rolling and cutting, sheets with two different thicknesses of ۶ and ۲۰ mm were obtained. The sheets after homogenization were solutionized at ۴۸۵°C for ۳۰ and ۹۰ minutes, respectively, due to differences in thickness and thermal gradients. The solutionized samples were quenched in ۳ polymer solutions containing ۱۰, ۳۰, and ۵۰% Poly Alekylene Glycol. The results showed that melting, casting, rolling, and heat treatment of AA۷۰۷۵ alloy swarf similar properties to this alloy is achievable. Microstructural studies by optical microscopes (OM), Field Emission Scanning Electron Microscopy (FESEM), and X-ray diffraction (XRD) showed that by increasing the quenching rate after the solutionizing process, precipitation increases during aging. The tensile test results indicated that as the quench rate and internal energy increase, the diffusion driving force would increase the precipitation of alloying elements. Hence, this leads to an increase in hardness and reduction of its strain after aging.
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Authors
Mohammad Porhonar
Department of Materials Engineering, Islamic Azad University, Karaj Branch, Karaj, Alborz, Iran
Yazdan Shajari
Materials and Energy Research Center, Meshkindasht, Alborz, Iran.
Seyed Hossein Razavi
School of Metallurgy and Materials Engineering, Iran University of Science and Technology, Tehran, Iran.
Zahra-Sadat Seyedraoufi
Department of Materials Engineering, Islamic Azad University, Karaj Branch, Karaj, Alborz, Iran
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