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Keywords: grain boundaries
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Journal Articles

Investigation of Stress Assisted Grain Boundary Oxidation Cracking in MAR-M002 High Pressure Turbine Blades

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Austin Selvig, Xiao Huang, Mike Hildebrand, David Stek
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. August 2011, 133(8): 082101.
https://doi.org/10.1115/1.4002821
Published Online: April 8, 2011
... of these blades. HPT blades made of the nickel-based superalloy Mar-M002 have been found to suffer from stress assisted grain boundary oxidation (SAGBO) cracking. HPT blades removed from an RB211-24C aeroderivative industrial GTE were sectioned, and the cracks and microstructure were studied using scanning...
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Topics: Blades, Fracture (Materials), Fracture (Process), Grain boundaries, Oxidation, Stress, Temperature, Cracking (Materials), Coating processes, Oxygen
Journal Articles

The Influence of the Grain Structure Size on Microstructurally Short Cracks

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Igor Simonovski, Leon Cizelj
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. July 2009, 131(4): 042903.
https://doi.org/10.1115/1.3079610
Published Online: April 15, 2009
...Igor Simonovski; Leon Cizelj The dominant processes in the initialization and propagation of microstructurally short cracks include microstructural features such as crystallographic orientations of grains, grain boundaries, inclusions, voids, material phases, etc. The influence...
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Topics: Fracture (Materials), Plasticity, Crystals
Journal Articles

Biaxial Thermomechanical-Fatigue Life Property of a Directionally Solidified Ni-Base Superalloy

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Takashi Ogata
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. November 2008, 130(6): 062101.
https://doi.org/10.1115/1.2943158
Published Online: August 21, 2008
...Takashi Ogata High-temperature components in thermal power plants are subjected to creep-fatigue loading where creep cavities initiate and grow on grain boundaries. Development of life assessment methods of high-temperature components in gas turbine for maintenance and operating cost reduction...
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Topics: Blades, Coatings, Creep, Failure, Fatigue, Fracture (Materials), Gas turbines, Superalloys, Thermomechanics, Waves