کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7176912 1466739 2016 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Constitutive behaviour under hot stamping conditions
ترجمه فارسی عنوان
رفتار سازمانی در شرایط داغ مهر زنی
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی صنعتی و تولید
چکیده انگلیسی
The modelling of the hardening behaviour at high temperatures and a range of strain rates is extensively discussed. The hardening behaviour is characterized using tensile tests done in a Gleeble testing machine. The specimen is heated by an electric current, soaked to get fully austenized, cooled down to its desired testing temperature and then drawn to fracture with a given strain rate without a further drop of the temperature. One of the major challenges of this test is to achieve a uniform temperature distribution over the sample, to ensure homogeneous austenization. A dedicated tensile sample geometry enables a much more uniform temperature distribution than a regular sample geometry. Yielding and hardening behaviour have been characterized with a Kocks-Mecking plot. These characterizations have been used to fit parameters for a physically based hardening model that is applicable in a wide range of strain rates and temperatures. The predicted strains in FEM simulations that use these hardening curves match well with thickness measurements on hot stamped parts.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Materials Processing Technology - Volume 228, February 2016, Pages 34-42
نویسندگان
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