کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
769463 897392 2009 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Erosion-fatigue of steam turbine blades
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی صنعتی و تولید
پیش نمایش صفحه اول مقاله
Erosion-fatigue of steam turbine blades
چکیده انگلیسی

The premature failure of steam turbine rotor blades, manufactured in forged 12% Cr–NiMoV martensitic stainless steel, was investigated using visual inspection, non-destructive testing, macro and microfractography, microstructural characterization, EDS microanalysis, chemical analysis, micro hardness and tensile testing. The blades belonged to the last stage of a thermoelectric plant steam turbine generator (140 MV A). The results indicated that the failure of the blades was promoted by foreign-particle erosion, which attacked preferentially the low-pressure side of the lower trailing edge of the blades. The resulting wear grooves acted as stress raisers and promoted the nucleation of fatigue cracks, which probably grew during the transition events of the steam turbine operation. Finally, water drop erosion was observed on the blade upper leading edge (low-pressure side).

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Engineering Failure Analysis - Volume 16, Issue 7, October 2009, Pages 2290–2303
نویسندگان
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