کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9796489 | 1514948 | 2005 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Dynamic recrystallization behavior and microstructural evolution in a Mn-Cr gear steel
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Using a Gleeble 1500 hot simulator, the dynamic recrystallization (DRX) behavior and changes of DRX grain size of a Mn-Cr type gear steel have been investigated at deformation temperatures of 900-1150 °C, strain rates of 0.1-1 sâ1, and initial austenite grain sizes of 70-150 μm. The experimental results show that the Mn-Cr gear steel exhibits a typical DRX behavior under higher deformation temperatures, lower strain rates and smaller initial austenite grain sizes. The DRX takes place under the conditions with Zener-Hollomon parameter (Z) less than a critical value Zc. The DXR grains are formed by the bulging mechanism. By regression analysis, activation energy and stress exponent were determined to be 378.6 kJ/mol and 5.8, respectively. The complete DRX grain size is a power law function of Z with an exponent of â0.25. The reason why Z parameter determines uniquely the DRX grain size was analyzed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 393, Issues 1â2, 25 February 2005, Pages 102-108
Journal: Materials Science and Engineering: A - Volume 393, Issues 1â2, 25 February 2005, Pages 102-108
نویسندگان
B.X. Wang, X.H. Liu, G.D. Wang,