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Iranian Journal of Mechanical Engineering Transactions of the ISME، جلد ۲۳، شماره ۱، صفحات ۳۰-۴۵
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عنوان انگلیسی The Johnson-cook Constitutive Equation for Compression Behavior of the New Piston Aluminum Alloys at High Temperatures
چکیده انگلیسی مقاله New alloys of aluminum piston alloy made by adding more nickel to their usual composition. Bulk-forming of new alloys at ambient temperature by conventional methods is not possible. Therefore, the hot-compression deformation behavior of these alloys has been studied in this study. Based on the true stress-strain graphs obtained from the experiments, the constitutive model proposed for these alloys based on the Johnson-Cook model. Then this model is improved by considering the coupled effects of the parameters. The accuracy of the proposed models has been investigated using appropriate statistical analysis, and as a result, the accuracy of the presented models has been confirmed. The modified model, compared to original model, in addition to the higher accuracy, can predict the trend of changes in flow stress. The study of variations of the model coefficients shows that with an increasing nickel content in the alloy composition, the strength and the flow stress of the alloys increased intensely at all temperatures and strain rates. Also, by increasing the amount of nickel, the effect of the strain rate on flow stress is reduced.
کلیدواژه‌های انگلیسی مقاله aluminum piston alloy,Nickel,hot-deformation,Constitutive model,Johnson-Cook
نویسندگان مقاله M. M. Moghadam |
M.Sc. Student, Department of Materials and Textile Engineering, Faculty of Engineering, Razi University, Kermanshah, Iran

Sh. Zangeneh |
Assistant Professor, Department of Materials and Textile Engineering, Faculty of Engineering, Razi University, Kermanshah, Iran

S. Rasaee |
Corresponding author, Assistant Professor, Department of Mechanical Engineering, Faculty of Engineering, Kermanshah University of Technology, Kermanshah, Iran

M. Mojtahedi |
Assistant Professor, Department of Materials and Textile Engineering, Faculty of Engineering, Razi University, Kermanshah, Iran

نشانی اینترنتی https://jmee.isme.ir/article_253353_bf7ec54dc916ddf5ef4b5f70caeafbd6.pdf
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