چکیده مقاله
The thermomechanical behavior of Al5083 B4C nanocomposite with 0, 3, and 5 wt% B4C, produced via mechanical alloying and forming processes hot extrusion at 505°C and press sintering at 600°C , was investigated at temperatures of 350 550°C and strain rates of 0 01 0 1 s⁻¹ Stress strain curves revealed that increasing temperature reduces flow stress due to dynamic recrystallization, while increasing B4C content and strain rate enhances stress by up to 20% due to dislocation pinning Extruded samples exhibited lower flow stress approximately 15 MPa and higher density about 98% vs 95% compared to press sintered samples The hyperbolic sine equation was fitted with α = 0 01 0 02, n = 4 5 5 5, and Q = 190 255 kJ/mol higher in extrusion Results indicated that 3 wt% B4C is optimal, with continuous dynamic recrystallization as the dominant deformation mechanism
کلیدواژهها
نویسندگان
Ali Alizadeh
Faculty of Materials and Manufacturing Technologies, Malek Ashtar University of Technology, Tehran, Iran
Masoud Lotfian
Faculty of Materials and Manufacturing Technologies, Malek Ashtar University of Technology, Tehran, Iran
Mohsen Heydari Beni
Faculty of Materials and Manufacturing Technologies, Malek Ashtar University of Technology, Tehran, Iran
جعفر اسکندری جم
Faculty of Materials and Manufacturing Technologies, Malek Ashtar University of Technology, Tehran, Iran
Majid Eskandari Shahraki
Department of Aerospace Engineering, Faculty of Engineering, Ferdowsi University of Mashhad, Mashhad, Iran
شیوه ارجاع
Alizadeh, Ali and Lotfian, Masoud and Heydari Beni, Mohsen and Eskandari Jam, Jafar and Eskandari Shahraki, Majid,1404,Hot Deformation Behavior of Al5083-B4C Nanocomposite: Impact of Temperature, Strain Rate, and Forming Method on Flow Stress and Activation Energy,The First National Conference on Applied Technologies in Mechanical Engineering (ATME2025),Ahvaz
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