کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
829862 1470346 2013 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Flow behavior modeling of a Ti–6Al–7Nb biomedical alloy during manufacturing at elevated temperatures
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی (عمومی)
پیش نمایش صفحه اول مقاله
Flow behavior modeling of a Ti–6Al–7Nb biomedical alloy during manufacturing at elevated temperatures
چکیده انگلیسی


• Flow stress is substantially sensitive to deformation strain rate and temperature.
• Employing an Arrhenius-type equation for describing high temperature flow behavior.
• Material constants, A and Q in the constitutive equations are functions of strain.
• High reliability of the proposed strain-dependent constitutive equations.

A proper constitutive base model has been developed to predict the high temperature compressive flow behavior of a Ti–6Al–7Nb biomedical alloy in two phase α + β region. The isothermal hot compression tests were carried out in the temperature range of 850–1000 °C under the strain rates of 0.0025, 0.025 and 0.25 s−1 up to the true strain of 0.65. The constitutive model has been developed through a hyperbolic-sine Arrhenius type equation to relate the flow stress, strain rate and temperature. The influence of strain has been also incorporated by considering the variation of material constants as a function of strain. The proposed constitutive equation has been described in terms of Zener–Hollomon parameter in an exponential type equation, the accuracy of which has been evaluated using standard statistical parameters. The predicted flow stress curves are appropriately found to be in good agreement with the experimental ones.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials & Design - Volume 51, October 2013, Pages 457–465
نویسندگان
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