کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1580857 1514833 2010 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Development and validation of a processing map for Aermet100 steel
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Development and validation of a processing map for Aermet100 steel
چکیده انگلیسی

Using the flow stress data obtained from the compression tests in the temperature ranges of 800–1200 °C and at strain rate ranges of 0.01–50 s−1, the processing map of Aermet100 steel was developed based on a simple instability condition applicable to a general flow stress versus strain rate curve at any strain and temperature. Deformation mechanisms in the stable and unstable regimes were verified with the microstructure observations. The optimum hot processing windows of Aermet100 steel are at temperature ranges of 1025–1200 °C and at strain rate ranges of 0.03–15 s−1, in which dynamic recrystallization occurs with a peak efficiency of power dissipation of 38%. The instability regimes I and II occur at low temperature ranges of 800–975 °C, and at strain rate ranges of 0.1–6 s−1 and 4.5–33 s−1, respectively. While the instability regime III occurs at high temperature ranges of 950–1200 °C and at high strain rate ranges of 15–50 s−1. These instability regimes, whose microstructural manifestations such as cracks, shear bands and twin kink bands are detrimental to the mechanical properties of components, need to be avoided during hot processing of Aermet100 steel.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 527, Issues 4–5, 15 February 2010, Pages 1165–1171
نویسندگان
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