کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
788522 1466110 2010 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Creep strength of high chromium steels welded parts under multiaxial stress conditions
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
پیش نمایش صفحه اول مقاله
Creep strength of high chromium steels welded parts under multiaxial stress conditions
چکیده انگلیسی

Internal pressure creep tests as well as uniaxial creep tests were conducted on 9Cr and 12Cr steels welded joints in order to evaluate creep strength of the high chromium steels welded parts under multiaxial stress conditions, where a welding direction of the internal pressure specimen was longitudinal one. Except under high stress conditions, cracks occurred at fine grained HAZ region for both materials, i.e., the type IV mode fracture. Regarding creep voids distribution along thickness direction of the internal pressure specimens, the creep voids were predominantly observed in the middle of the thickness at the HAZ region while they might be negligible in outer and inner surface of the specimen. Finite element analysis which considers HAZ and weld metal properties revealed that the principal stress (hoop stress) and the stress multiaxiality are the largest in the middle of the thickness at the HAZ region under the internal pressure creep conditions. It was suggested that the creep voids remarkably occurred inside the specimens at the HAZ region due to the severe stress state conditions.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Pressure Vessels and Piping - Volume 87, Issue 6, June 2010, Pages 357–364
نویسندگان
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