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Proceedings Papers

Proc. ASME. GT2023, Volume 10: Steam Turbine, V010T20A013, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-102664
... that the steam turbine component is suitable for future operation. This ensures that plants are well placed to deliver more flexible operation in the energy industry through carefully tailored refurbishments and reworks. creep FE-simulations HCF LCF lifetime prediction turbines flexible operation...
Proceedings Papers

Proc. ASME. GT2023, Volume 10: Steam Turbine, V010T20A023, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-103882
... also be subjected to high stress and or cyclic stresses during service. As a result, they may develop failures and other issues due to long term service. The vanes of the diaphragms may develop cracks and the diaphragms may develop dishing which is generally a result of creep deformation resulting from...
Proceedings Papers

Proc. ASME. GT2023, Volume 8: Industrial and Cogeneration; Manufacturing Materials and Metallurgy, V008T17A007, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-101741
... material. For this, creep and stress rupture, fatigue, and combination of stress rupture and fatigue testing was performed. The findings in this study show that FRHT provides superior metallurgical and mechanical properties of MGA 1400DS when compared to new and aged material. Keywords: superalloy, gas...
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
...Proceedings of ASME Turbo Expo 2023 Turbomachinery Technical Conference and Exposition GT2023 June 26-30, 2023, Boston, Massachusetts, USA GT2023-102193 DEVELOPMENT AND EVALUATION OF GENERIC TEST PIECES FOR CREEP PROPERTY ASSESSMENT OF LASER POWDER BED FUSION COMPONENTS Sandra Megahed Technical...
Topics: Creep, Lasers
Proceedings Papers

Proc. ASME. GT2023, Volume 8: Industrial and Cogeneration; Manufacturing Materials and Metallurgy, V008T17A022, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-104086
... performance at 150°C compared to 2618-T851 in all aspects of material performance: tensile properties, thermal stability, fracture toughness, fatigue and creep performance. These properties are all critical for choosing the appropriate alloy for an impeller or rotor in order to allow either improved...
Proceedings Papers

Proc. ASME. GT2023, Volume 13D: Turbomachinery — Multidisciplinary Design Approaches, Optimization, and Uncertainty Quantification; Radial Turbomachinery Aerodynamics; Unsteady Flows in Turbomachinery, V13DT34A002, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-100746
..., contractual penalty shall be paid in this case and company reputation can be affected. Therefore, it is important to find out the weakness of blades as quickly as possible. One of the central causes of blades’ weaknesses is creep, that is the permanent deformation of material under the influence of mechanical...
Proceedings Papers

Proc. ASME. GT2022, Volume 1: Aircraft Engine; Ceramics and Ceramic Composites, V001T02A008, June 13–17, 2022
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-83270
.... Effects of multiple small holes on tensile stress-strain and tensile creep resistance of an oxide fiber-oxide matrix composite comprising Nextel™720 alumina-mullite fibers and a porous alumina matrix were evaluated at 1200°C. Gauge section of each test specimen included seventeen (17) 0.5-mm diameter...
Proceedings Papers

Proc. ASME. GT2022, Volume 1: Aircraft Engine; Ceramics and Ceramic Composites, V001T01A028, June 13–17, 2022
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-82760
... Abstract The creep fracture life of turbine blades is a limitation of the whole engine life because of its high operating temperature. Thus, developing an analysis approach of creep damage based on complex service history is of significant importance for the safe operation and economic overhaul...
Proceedings Papers

Proc. ASME. GT2022, Volume 7: Industrial and Cogeneration; Manufacturing Materials and Metallurgy; Microturbines, Turbochargers, and Small Turbomachines; Oil & Gas Applications, V007T17A015, June 13–17, 2022
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-82512
...Proceedings of ASME Turbo Expo 2022 Turbomachinery Technical Conference and Exposition GT2022 June 13-17, 2022, Rotterdam, The Netherlands GT2022-82512 CREEP ANALYSIS AND MICROSTRUCTURAL EVALUATION OF A NOVEL ADDITIVELY MANUFACTURED NICKEL-BASE SUPERALLOY (ABD®-900AM) Alex Bridges Electric Power...
Proceedings Papers

Proc. ASME. GT2022, Volume 7: Industrial and Cogeneration; Manufacturing Materials and Metallurgy; Microturbines, Turbochargers, and Small Turbomachines; Oil & Gas Applications, V007T17A014, June 13–17, 2022
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-82499
... Abstract Gas turbine components and many industrial high temperature components suffer from creep, a viscous effect of the material that induce irreversible deformation, microstructural damage, and eventually failure. Creep strain (where the creep strain ε cr is a function of time, stress...
Proceedings Papers

Proc. ASME. GT2022, Volume 8A: Structures and Dynamics — Aerodynamics Excitation and Damping; Bearing and Seal Dynamics; Emerging Methods in Engineering Design, Analysis, and Additive Manufacturing; Fatigue, Fracture, and Life Prediction, V08AT24A006, June 13–17, 2022
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-81676
... Abstract Cast polycrystalline nickel-base superalloys are typically used for critical high temperature aerospace and automotive components, such as turbine blades or turbocharger wheels. These high temperature components can undergo creep damage caused by, e.g., centrifugal forces...
Proceedings Papers

Proc. ASME. GT2021, Volume 9B: Structures and Dynamics — Fatigue, Fracture, and Life Prediction; Probabilistic Methods; Rotordynamics; Structural Mechanics and Vibration, V09BT27A001, June 7–11, 2021
Publisher: American Society of Mechanical Engineers
Paper No: GT2021-58480
... Abstract This paper introduces a computationally efficient Reduced Order Modeling (ROM) approach for the probabilistic prediction of creep-damage failure. Component-level probabilistic simulations are needed to assess the reliability and safety of high-temperature components. Full-scale...
Proceedings Papers

Proc. ASME. GT2021, Volume 4: Controls, Diagnostics, and Instrumentation; Cycle Innovations; Cycle Innovations: Energy Storage; Education; Electric Power, V004T06A017, June 7–11, 2021
Publisher: American Society of Mechanical Engineers
Paper No: GT2021-59668
... to fill in engine operating data at stations where recordings have not been taken. Engine life consumption was based on creep and low cycle fatigue failure mechanisms of the first gas generator turbine stage. Creep life fractions were calculated based on the Larson-Miller parameter curves and the fatigue...
Proceedings Papers

Proc. ASME. GT2021, Volume 1: Aircraft Engine; Fans and Blowers; Marine; Wind Energy; Scholar Lecture, V001T18A002, June 7–11, 2021
Publisher: American Society of Mechanical Engineers
Paper No: GT2021-01719
.... The virtues of using Ni-base superalloys in hot- Keywords: MCrAlY, aluminides, thermal barrier coatings, single section components has been well recognized and practiced as a crystal alloys, hot corrosion, corrosion and oxidation testing, means of substantial increase in turbine-inlet temperature, creep...
Proceedings Papers

Proc. ASME. GT2021, Volume 7: Industrial and Cogeneration; Manufacturing Materials and Metallurgy, V007T17A016, June 7–11, 2021
Publisher: American Society of Mechanical Engineers
Paper No: GT2021-59765
... Abstract As pressure ratios and firing temperatures continue to rise, creep becomes of greater concern everywhere within a gas turbine engine. As a rule of thumb, just a 14°C increase in metal temperature can halve the expected rupture life of a part. In the past, companies might be satisfied...
Topics: Creep, Rupture
Proceedings Papers

Proc. ASME. GT2020, Volume 8: Industrial and Cogeneration; Manufacturing Materials and Metallurgy; Marine; Microturbines, Turbochargers, and Small Turbomachines, V008T18A012, September 21–25, 2020
Publisher: American Society of Mechanical Engineers
Paper No: GT2020-16017
... Abstract In conventional creep testing (CCT) a specimen is subject to constant load and temperature for a long-duration until creep rupture occurs. Conventional testing can be costly when considering the number of experiments needed to characterize the creep response of a material over a range...
Proceedings Papers

Proc. ASME. GT2020, Volume 10B: Structures and Dynamics, V10BT27A008, September 21–25, 2020
Publisher: American Society of Mechanical Engineers
Paper No: GT2020-14495
... Abstract Industrial gas turbine blades are subjected to high temperatures and an array of mechanical and dynamic loads, making creep and high-cycle fatigue critical aspects of turbine blade design. The combination of creep and high-cycle fatigue produces a synergistic interaction effect whose...
Proceedings Papers

Proc. ASME. GT2020, Volume 10B: Structures and Dynamics, V10BT27A017, September 21–25, 2020
Publisher: American Society of Mechanical Engineers
Paper No: GT2020-14870
... Abstract Time-dependent creep induced failure is a major concern for structural components (i.e. IGT components, Gen IV nuclear reactor components) operating at elevated temperature. The likelihood of a failure is aggravated by randomness in several sources of uncertainty. Creep rupture data...
Proceedings Papers

Proc. ASME. GT2008, Volume 5: Structures and Dynamics, Parts A and B, 225-234, June 9–13, 2008
Publisher: American Society of Mechanical Engineers
Paper No: GT2008-51278
... creep damage mechanics failure Future oxy-fuel and hydrogen-fired turbines promise increased efficiency and low emissions. However, this comes at the expense of increased thermal load from higher inlet temperatures and a change in the working fluid in the gas path, leading to aero...
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...