نوع مقاله : مقاله پژوهشی
نویسندگان
1 مربی دانشگاه آزاد اسلامی مشهد- گلبهار
2 مربی دانشکده فنی شهید منتظری
3 استادیار گروه ساخت و تولید دانشگاه تربیت دبیر شهید رجائی
چکیده
کلیدواژهها
عنوان مقاله [English]
Techniques of severe plastic deformation have been of continual interest in the production of novel metallic microstructures. Among these, accumulative roll bonding and multi axial forging have been extensively used in modern industry. Accumulative roll-bonding (ARB) and multi axial forging (MAF) process are severe plastic deformation process capable of developing grains below1m diameter and to improve mechanical properties. In this study, high strength and high rigidity copper were produce by ARB and MAF methods, using commercial pure copper to seven cycles. Mechanical and structure analyses were conducted on the produce specimen to evaluate their mechanical and structural properties in different ARB and MAF cycles. Hardness, yield stress, UTS and ductility properties of samples were determined by mechanical tests. The results show that hardness, yield strength and UTS of the axial forged and rolled samples are increased whereas the strain hardening decreased by increasing cycles. With increasing strain during ARB and MAF passes strength of these specimen increased but elongation decreased. According to the last analysis results, it can be said that multi axial forging in compare of ARB process can produce ultra-fine grained materials to improve the mechanical properties including tension and hardness
کلیدواژهها [English]
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