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Keywords: microstructure
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Proceedings Papers

Proc. ASME. GT2023, Volume 8: Industrial and Cogeneration; Manufacturing Materials and Metallurgy, V008T17A009, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-102193
... freedom and the manufacture of high temperature Ni-based materials, such as IN738LC. The PBFLB/M microstructure is dependent on several factors, including process parameters, component geometry, build orientation and post-processing steps (e.g. heat treatment). The correlation between the resulting...
Topics: Creep, Lasers
Proceedings Papers

Proc. ASME. GT2023, Volume 8: Industrial and Cogeneration; Manufacturing Materials and Metallurgy, V008T17A010, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-102205
..., propensity to cracking, weldability, gas tungsten arc welding, post weld heat treatment, microstructure, tensile and stress rupture properties NOMENCLATURE AM additive manufacturing ASTM American Society for Testing and Materials AWM all weld metal AWS American Welding Society DED direct energy disposition...
Proceedings Papers

Proc. ASME. GT2023, Volume 2: Ceramics and Ceramic Composites; Coal, Biomass, Hydrogen, and Alternative Fuels, V002T02A005, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-101962
... Abstract Thermal barrier coatings (TBCs) are widely used to protect hot components in gas turbine engines. With higher turbine inlet temperature, the thermal radiative transfer becomes important in the overall heat transfer in the coating layer. The microstructure, including pore size...
Proceedings Papers

Proc. ASME. GT2022, Volume 1: Aircraft Engine; Ceramics and Ceramic Composites, V001T02A003, June 13–17, 2022
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-80853
... Abstract The yttria-stabilized zirconia (YSZ) top coat provides a thermal resistance function in the thermal barrier coatings used in gas turbines and Diesel engines. Besides the thermal conductivity, the thermal radiative properties, especially their dependence on the coating microstructure...
Proceedings Papers

Proc. ASME. GT2022, Volume 7: Industrial and Cogeneration; Manufacturing Materials and Metallurgy; Microturbines, Turbochargers, and Small Turbomachines; Oil & Gas Applications, V007T17A012, June 13–17, 2022
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-82300
... and turbine design, many abradable compositions have been developed. Generally, all abradable seal materials employ voids or pores in the microstructure as a designed-defect to mitigate thermal and kinetic energy from blade rub. Some also have added non-metallic phases to provide other means of maintaining...
Proceedings Papers

Proc. ASME. GT2021, Volume 8: Oil and Gas Applications; Steam Turbine, V008T22A003, June 7–11, 2021
Publisher: American Society of Mechanical Engineers
Paper No: GT2021-58497
... that produced by PTA welding by controlling the cooling rate. To investigate the effect of aging on the microstructures and mechanical properties of the cast samples, the samples were aged in electric furnaces where the temperature was controlled to the steam temperature of steam turbines and above. The test...
Proceedings Papers

Proc. ASME. GT2020, Volume 8: Industrial and Cogeneration; Manufacturing Materials and Metallurgy; Marine; Microturbines, Turbochargers, and Small Turbomachines, V008T18A009, September 21–25, 2020
Publisher: American Society of Mechanical Engineers
Paper No: GT2020-15268
... Abstract The metallurgical aspects of turbomachinery components, both during manufacture and service intervals, are of particular interest because they dictate performance, degradation, and probability of defect formation. As certaining the microstructural state without destructive cut-ups...
Proceedings Papers

Proc. ASME. GT2012, Volume 5: Manufacturing Materials and Metallurgy; Marine; Microturbines and Small Turbomachinery; Supercritical CO2 Power Cycles, 11-19, June 11–15, 2012
Publisher: American Society of Mechanical Engineers
Paper No: GT2012-68042
... cracking evaluation light microscope metallography microstructure nozzle segment oxidation nozzle segment repairs The 1 st stage nozzle segments experience damage such as creep, fatigue, high temperature corrosion and foreign object damage in service. Amongst the other gas turbine...
Proceedings Papers

Proc. ASME. GT2011, Volume 6: Structures and Dynamics, Parts A and B, 189-198, June 6–10, 2011
Publisher: American Society of Mechanical Engineers
Paper No: GT2011-46863
... embrittlement failure investigation gamma prime heat treatment microstructure oxidation 1 Copyright © 2011 by ASME P FAILURE INVESTIGATION OF 1ST STAGE BUCKETS FROM FRAME 3002, 10 MW GAS TURBINE UNIT Girish M. Shejale* David Ross Quality Control Department Engineering Department Masaood John Brown...
Proceedings Papers

Proc. ASME. GT2011, Volume 1: Aircraft Engine; Ceramics; Coal, Biomass and Alternative Fuels; Wind Turbine Technology, 491-496, June 6–10, 2011
Publisher: American Society of Mechanical Engineers
Paper No: GT2011-45930
... of this composite material are generated using serial sectioning of the test specimens. These images are then used to develop very detailed finite element models of the cross-sections using the public domain software OOF2 (Object Oriented Analysis of Material Microstructures). Examination of these images shows...
Proceedings Papers

Proc. ASME. GT2010, Volume 1: Aircraft Engine; Ceramics; Coal, Biomass and Alternative Fuels; Education; Electric Power; Manufacturing Materials and Metallurgy, 891-898, June 14–18, 2010
Publisher: American Society of Mechanical Engineers
Paper No: GT2010-22100
... is governed by the microstructural evolution of the thermally grown oxide (TGO) layer between the ceramic top layer and the bond coat. While the TGO provides a barrier to the oxygen diffusion, its continuous growth imposes stresses on the TGO/bond coat and TGO/topcoat interfaces that will eventually lead...
Proceedings Papers

Proc. ASME. GT2010, Volume 1: Aircraft Engine; Ceramics; Coal, Biomass and Alternative Fuels; Education; Electric Power; Manufacturing Materials and Metallurgy, 969-977, June 14–18, 2010
Publisher: American Society of Mechanical Engineers
Paper No: GT2010-22542
... Stage Nozzle Segment are presented and discussed. creep-fatigue thermal-fatigue electropolishing technique hot corrosion nozzle segment microstructure oxidation repairs 1 Copyright © 2010 by ASME Proceedings of ASME Turbo Expo 2010: Power for Land, Sea and Air GT2010 June 14-18, 2010...
Proceedings Papers

Proc. ASME. GT2007, Volume 5: Turbo Expo 2007, 71-79, May 14–17, 2007
Publisher: American Society of Mechanical Engineers
Paper No: GT2007-27437
... titanium aluminide heat treatment microstructure creep The microstructures and creep properties at 760 °C and 276 MPa of three powder metallurgy TiAl alloys (Ti-48Al-2Cr-2Nb, Ti-48Al-2Cr-2Nb+0.5W, and Ti-48Al-2Cr-2Nb+1W (atomic percent)) are presented. The results indicate...