A Comparative Study on Constitutive Modeling of Hot Deformation Flow Curves in AZ91 Magnesium Alloy

Publish Year: 1395
نوع سند: مقاله ژورنالی
زبان: English
View: 397

This Paper With 11 Page And PDF Format Ready To Download

  • Certificate
  • من نویسنده این مقاله هستم

استخراج به نرم افزارهای پژوهشی:

لینک ثابت به این Paper:

شناسه ملی سند علمی:

JR_IJMF-3-1_003

تاریخ نمایه سازی: 8 دی 1395

Abstract:

Modeling the flow curves of materials at elevated temperatures is the first step in mathematical simulation of the hot deformation processes of them. In this work, a comparative study was provided to examine the capability of three different constitutive equations in modeling the hot deformation flow curves of AZ91 magnesium alloy. As such, the Arrhenius and exponential equations with strain dependent constants, and a recently developed simple model (developed based on a power function of Zener-Hollomon parameter and a third order polynomial function of ε power of a constant number) were examined. Root mean square error (RMSE) criterion was used to assess the modeling performance of the examined constitutive equations. Accordingly, it was found that the Arrhenius equation with strain dependent constants has the best performance for modeling the hot deformation flow curves of AZ91 magnesium alloy. The results can be further used in mathematical simulation of hot deformation manufacturing processes of tested alloy.

Authors

M Rakhshhorshid

Department of Mechanical Engineering, Birjand University of Technology, POBOX 97175-569, Birjand, Iran

A.R Maldar

Materials Engineering Department, Hakim Sabzevari University, POBOX 397, Sabzevar, Iran