کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
832481 908121 2010 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Prediction of the critical conditions for initiation of dynamic recrystallization
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی (عمومی)
پیش نمایش صفحه اول مقاله
Prediction of the critical conditions for initiation of dynamic recrystallization
چکیده انگلیسی

Both the critical stress and strain for initiation of dynamic recrystallization (DRX) were determined using: (1) the strain hardening rate versus stress curve, (2) the natural logarithm of strain hardening rate versus strain curve, and (3) the constitutive equations. In order to perform these analyses, the behavior of a 17-4 PH stainless steel during hot compression test was investigated at temperatures of 950–1150 °C and strain rates of 0.001–10 s−1. The first and second methods were found to be the best ones for determining the critical stress and strain, respectively. The Cingara constitutive equation was also used to model the flow curves up to the peak point and subsequently was used for predicting the critical strain. In summary, for 17-4 PH stainless steel, the DRX was found to start when the normalized stress and strain reach to the values of 0.89 and 0.47, respectively.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials & Design - Volume 31, Issue 3, March 2010, Pages 1174–1179
نویسندگان
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