کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
790969 901903 2014 17 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Plasticity and fracture modeling of quench-hardenable boron steel with tailored properties
ترجمه فارسی عنوان
مدل سازی پلاستیسیته و شکستگی فولاد بورون مقاوم به خشک شدن با خواص مناسب
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی صنعتی و تولید
چکیده انگلیسی


• Hardness-based deformation and fracture model for quench-hardenable 22MnB5.
• Strain hardening and fracture characterization of three distinct hardness grades.
• Simulation model based on piecewise linear interpolation of characterized grades.
• Model validation on specimens featuring different hardness transition zones.

In this article, a constitutive model for quench-hardenable boron steel is presented. Three sets of boron steel blanks are heat treated such that their as-treated microstructures are close to fully martensitic, bainitic and ferritic/pearlitic, respectively. Hardness measurements show that the resulting blanks cover the full scope of possible hardness values, from 165 HV in the ferritic/pearlitic range to 477 HV in the fully hardened state. These three main grades provide the input data for a constitutive model consisting of an extended Swift hardening law and a stress triaxiality and Lode angle dependent fracture criterion. The hardening behavior of each grade is determined using standard tensile tests at quasi-static strain rates. The strain-based fracture criterion is calibrated using four different flat fracture samples. The behavior of intermediate hardness grades is approximated by piecewise linear combination of the three calibrated constitutive models. A newly developed tapered tensile test specimen featuring a hardness transition zone in the gauge section is used to verify the model at hand. A four point bending test of a top hat section of intermediate hardness is used to verify the model for complex loading conditions.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Materials Processing Technology - Volume 214, Issue 6, June 2014, Pages 1211–1227
نویسندگان
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