کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1574205 1514707 2015 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The effect of multiaxial stress state on creep behavior and fracture mechanism of P92 steel
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
The effect of multiaxial stress state on creep behavior and fracture mechanism of P92 steel
چکیده انگلیسی
The creep experiments on plain and double U-typed notched specimens were conducted on P92 steel at 650 °C. The notch strengthening effect was found in the notched specimens. Fracture appearance observed by scanning electron microscopy revealed that dimpled fracture for relatively blunt notched specimen, and dimpled fracture doubled with intergranular brittle fracture for relatively sharp notched specimen, which meant that fracture mechanism of P92 steel altered due to the presence of the notch. Meanwhile, based on Norton-Bailey and Kachanov-Robotnov constitutive models, a modified model was proposed. Finite element simulations were carried out to investigate the effect of multiaxial stress state on the creep behavior, fracture mechanism and damage evolvement of P92 steel. The simulation results agreed well with the fracture behaviors observed experimentally.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 636, 11 June 2015, Pages 70-76
نویسندگان
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