Failure Analysis of Gas Turbine Last Stage Bucket Made of Udimet 500 Superalloy
This article presents a failure analysis of 37.5 mW gas turbine third stage buckets made of Udimet 500 superalloy. The buckets experienced repetitive integral tip shroud fractures assisted by a low temperature (type II) hot corrosion. A detailed analysis was carried out on elements thought to have influenced the failure process: a) the stress increase from the loss of a load bearing cross-sectional area of the bucket tip shroud by the conversion of metal to the corrosion product (scale), b) influence of the tip shroud microstructure (e.g., a presence of equiaxed and columnar grains, their distribution and orientation), c)...
Z. Mazur, J. Kubiak, C. Mariño-Lopez, Failure Analysis of Gas Turbine Last Stage Bucket Made of Udimet 500 Superalloy, ASM Failure Analysis Case Histories: Power Generating Equipment, ASM International, 2019, https://doi.org/10.31399/asm.fach.power.c9001602
Download citation file:
The ASM Data Ecosystem is a new and innovative product line that arms ASM Members and the scientific community with the tools and data required to exponentially expand the boundaries of materials science to meet the needs of Industry 4.0.