کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
790745 1466093 2012 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Crack initiation resistance characterization of weld by small-punch test in boiling water reactor environment
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
پیش نمایش صفحه اول مقاله
Crack initiation resistance characterization of weld by small-punch test in boiling water reactor environment
چکیده انگلیسی

Crack initiation resistance tests of a type 316L stainless steel weld were performed in high temperature and high pressure water. Small-punch test specimens were used under trapezoidal loading. This survey showed that there are two crack initiation modes in such conditions. The crack initiation at the slip line was promoted by a gradient in term of oxide film composition and in term of local environment (water chemistry). The crack initiation at inclusions was promoted by a local dissolution creating geometric default. The heat affected zone specimen presented the highest probability of initiation with the highest probability to have the longest crack according to the Poisson distribution. These phenomena were attributed to the residual stress that enhanced: (1) a deformation at the micro scale very irregular promoting an instability of the oxide film; (2) the diffusion of Fe producing the formation Fe3O4 associated with α-Fe2O3.


► We study the crack initiation of weld materials with small-punch test.
► There are 2 crack initiation modes: at inclusions or at slip lines.
► Crack initiation is more important with heat affected zone.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Pressure Vessels and Piping - Volumes 93–94, May–June 2012, Pages 22–28
نویسندگان
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