کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1449888 988717 2007 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The role of residual stress in neutral pH stress corrosion cracking of pipeline steels – Part II: Crack dormancy
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
The role of residual stress in neutral pH stress corrosion cracking of pipeline steels – Part II: Crack dormancy
چکیده انگلیسی

This investigation provides a quantitative analysis of the effect of Type I residual stresses on the occurrence of pitting and stress corrosion cracking (SCC) formation in pipeline steel exposed to neutral pH aqueous environments. It has been shown that SCC generated in neutral pH environments can be readily blunted due to plastic deformation (room temperature creep) and/or extensive anodic dissolution. As a result, a high positive tensile residual stress gradient is necessary for continued growth of SCC in pipeline steels exposed to this neutral pH environment. The tensile residual stress represents a large mechanical driving force for crack nucleation and short crack growth. Active cracks may become dormant as the near-surface residual stress gradient changes, due to self-equilibration, from highly tensile to a lower tensile state or to a compressive state. The change in residual stress level can occur within 1 mm of the surface, resulting in a large proportion of dormant SCC.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 55, Issue 1, January 2007, Pages 43–53
نویسندگان
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