Cause analysis of the fluorescent displays on the guide vane platform
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H. Y. Zhang
major in material science and technology, engaged in failure analysis of metal components, working at Materials Failure Analysis Center, Shi-changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences.
director of the Materials Failure Analysis Center, Shi-changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences.
Abstract
After surface grinding, linear and dotlike fluorescent displays were found on the blade platform of a gas turbine guide vane. Through detailed inspections of macro- and micro morphologies and the crack fracture, the fluorescent displays are fine cracks in nature, and the difference in morphology is related to the distribution of the fine cracks. The fine cracks should be shrinkage cracks in castings. The grinding force caused internal cracks to appear on the grinding surface.
Kurzfassung
Nach dem Schleifen der Oberfläche wurden an der Leitschaufelplattform einer Gasturbine linien- und punktförmige fluoreszierende Stellen beobachtet. Eingehende Untersuchungen der makro- und mikroskopischen Morphologie ergaben, dass es sich bei diesen fluoreszierenden Stellen um feine Risse handelt und die morphologischen Unterschiede durch die Verteilung dieser Risse bedingt sind. Bei solch feinen Rissen in Gussteilen dürfte es sich um Schrumpfrisse handeln. Durch die angewandte Schleifkraft wurden Risse im Innern des Gussteils an der Oberfläche sichtbar.
About the authors
major in material science and technology, engaged in failure analysis of metal components, working at Materials Failure Analysis Center, Shi-changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences.
director of the Materials Failure Analysis Center, Shi-changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences.
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Artikel in diesem Heft
- Contents
- Editorial
- Editorial
- Coupled microscopic and micromagnetic depth-specific analysis of plastic deformation and phase transformation of metastable austenitic steel AISI 304L by flow forming
- Segmented chip formation during machining under the influence of different atmospheres
- Lumen & Colours: A journey into the world of science
- Failure Analysis
- Cause analysis of the fluorescent displays on the guide vane platform
- Picture of the Month
- Picture of the Month
- News
- News
- Meeting Diary
- Meeting Diary
Artikel in diesem Heft
- Contents
- Editorial
- Editorial
- Coupled microscopic and micromagnetic depth-specific analysis of plastic deformation and phase transformation of metastable austenitic steel AISI 304L by flow forming
- Segmented chip formation during machining under the influence of different atmospheres
- Lumen & Colours: A journey into the world of science
- Failure Analysis
- Cause analysis of the fluorescent displays on the guide vane platform
- Picture of the Month
- Picture of the Month
- News
- News
- Meeting Diary
- Meeting Diary
