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گواهی نمایه سازی مقاله Hot Deformation Behavior of Ni80A Superalloy During Non-Isothermal Side Pressing

عنوان مقاله: Hot Deformation Behavior of Ni80A Superalloy During Non-Isothermal Side Pressing
شناسه (COI) مقاله: JR_IJMF-2-1_003
منتشر شده در مجله شکل دهی مواد در سال ۱۳۹۴
مشخصات نویسندگان مقاله:

M Seyed Salehi - Department of Materials Science and Engineering, K. N. Toosi University of Technology, Tehran, Iran
N Anjabin - Department of Materials Science and Engineering, School of Engineering, Shiraz University, Shiraz, Iran
R Mansoori - Research and Development Center, Turbine Machine Middle East Co., Tehran, Iran

خلاصه مقاله:
In the present study, the microstructural changes of a Nickel based superalloy Nimonic80A during a non-isothermal deformation were studied. Therefore, microstructure evolutionduring hot side pressing test was predicted with combined methods of finite element analysis andprocessing map of the material. The predicted results were validated through experimentalmicrostructural studies. The results show that the distribution of deformation parameters (i.e.strain, strain rate, and temperature) is non-uniform in the deformed samples. The severity of thisnon-uniformity depends on the amount of sample reduction. High reduction value at one stepforging can cause flow localization and non-uniform dynamic recrystallization, which results theformation of adiabatic shear bands, while using the lower reduction value at each forging step,leads to more uniformly distribution of the deformation parameters and thus uniform the dynamicrecrystallization with the stable flow. Hence the workability and microstructure of the Nimonic80A alloy are mainly depends on the deformation path.

کلمات کلیدی:
Hot deformation, Nimonic 80A, Processing map, Microstructure, Finite element analysis

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