کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7980258 1514728 2014 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Evolution of flow stress and microstructure during isothermal compression of Waspaloy
ترجمه فارسی عنوان
تکامل استرس جریان و ریزساختار در فشرده سازی واسپالوی است
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
چکیده انگلیسی
The evolution of the flow stress and microstructure for Waspaloy was studied in the 950-1140 °C temperature range under constant true strain rate conditions of 0.001-1 s−1 up to a true strain of 0.83 using isothermal hot compression testing. The impact of friction at the sample/anvil interface and adiabatic heating during deformation on the flow stress evolution was also examined. Mathematical models relating the flow stress to the deformation temperature and strain rate were derived using a power-law relationship. The strain rate sensitivity and the activation energy for hot deformation of Waspaloy were found to be considerably different for deformation in the subsolvus and supersolvus temperature ranges. According to the microstructural investigations, at 950 °C dynamic recovery (DRV) was the main softening mechanism. By contrast, dynamic recrystallization (DRX), partial or complete, occurred at temperatures above 950 °C and resulted in flow softening.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 615, 6 October 2014, Pages 497-510
نویسندگان
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