Alex Bridges
Electric Power Research Institute
CreepMetallurgyMaterials scienceWeldingSuperalloyImpressionPipingService (business)Gas turbinesCreep testingIndustrial researchNickel baseSmall sampleMartensitic microstructureBase metalElectric resistance weldingNickelCasting (metalworking)Structural engineering
3Publications
0Citations
Publications 3
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#2Alex Bridges (EPRI: Electric Power Research Institute)
Last. Daniel Purdy (EPRI: Electric Power Research Institute)
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The high-temperature steel grade 91 is intended to operate in service with a fully martensitic microstructure, achieved by a well-defined heat treatment. Unfortunately, lack of control, either duri...
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#1Alex Bridges (EPRI: Electric Power Research Institute)
#2John P. Shingledecker (EPRI: Electric Power Research Institute)H-Index: 17
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#1Alex Bridges (EPRI: Electric Power Research Institute)
#1A. Bridges (EPRI: Electric Power Research Institute)
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U.S. electric power production is significantly dependent on the operation of coal-fired steam generation units and a large majority of these units are reaching ages over 50+ years with concerns for operating component integrity and remaining life. This paper discusses a small sample testing technique (impression creep) that was used to estimate the remaining life of a hot reheat seam welded piping system that saw about 322,000 hours of operation at nominally 4170 kPa (605psig) and 538°C (1000°F...
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