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Proceedings Papers

Creep Strength Evaluation of a New and a Used Grade 91 Welded Joints by Using a Miniature Specimen

Takashi Ogata
Proc. ASME. PVP2018, Volume 6B: Materials and Fabrication, V06BT06A001, July 15–20, 2018
Publisher: American Society of Mechanical Engineers
Paper No: PVP2018-84010
https://doi.org/10.1115/PVP2018-84010
View Paper titled, Creep Strength Evaluation of a New and a Used Grade 91 Welded Joints by Using a Miniature Specimen
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Topics: Creep, Welded joints, Base metals, Metals, Damage, Stress, Finite element analysis, Power stations, Steam, Testing
Proceedings Papers

Creep Rupture Life Prediction of Grade 91 Circumferential Welded Tube Under Combined Internal Pressure With Axial Load

Takashi Ogata, Toshiki Mitsueda, Hiroshi Sakai
Proc. ASME. PVP2016, Volume 6A: Materials and Fabrication, V06AT06A068, July 17–21, 2016
Publisher: American Society of Mechanical Engineers
Paper No: PVP2016-63010
https://doi.org/10.1115/PVP2016-63010
View Paper titled, Creep Rupture Life Prediction of Grade 91 Circumferential Welded Tube Under Combined Internal Pressure With Axial Load
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Topics: Creep, Pressure, Rupture, Stress, Cracking (Materials), Damage, Fracture (Process), Pipes, Steel, Welded joints
Proceedings Papers

Elasto-Plastic and Creep Analysis of a First Stage Blade in a Land Based Gas Turbine Under Steady State Operating Conditions

Takayuki Sakai, Takashi Ogata, Akiyoshi Nomoto, Kazunori Watanabe
Proc. ASME. GT2000, Volume 4: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education, V004T03A061, May 8–11, 2000
Publisher: American Society of Mechanical Engineers
Paper No: 2000-GT-0419
https://doi.org/10.1115/2000-GT-0419
View Paper titled, Elasto-Plastic and Creep Analysis of a First Stage Blade in a Land Based Gas Turbine Under Steady State Operating Conditions
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Topics: Blades, Creep, Gas turbines, Steady state, Damage, Stress, Combustion gases, Cooling, Finite element analysis, Temperature
Proceedings Papers

Finite Element Modeling of the Eddy-Current Inspection of Land-Based Gas Turbine Blades

Hiroyuki Fukutomi, Takashi Ogata
Proc. ASME. GT2001, Volume 4: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education; IGTI Scholar Award, V004T04A022, June 4–7, 2001
Publisher: American Society of Mechanical Engineers
Paper No: 2001-GT-0031
https://doi.org/10.1115/2001-GT-0031
View Paper titled, Finite Element Modeling of the Eddy-Current Inspection of Land-Based Gas Turbine Blades
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Topics: Blades, Eddy current testing, Finite element analysis, Gas turbines, Modeling, Fracture (Materials), Combined cycle power stations, Combined cycles, Eddies (Fluid dynamics), Eddy currents (Electricity)
Proceedings Papers

Creep Damage Assessment Procedure for Weldment Parts of P91 Boiler Piping in USC Plants: Part II—Validation of a Creep Damage Assessment Method Based on Void Growth Simulation

Takashi Ogata, Takayuki Sakai, Masatsugu Yaguchi, Katsuaki Hoshino
Proc. ASME. PVP2011, Volume 6: Materials and Fabrication, Parts A and B, 513-519, July 17–21, 2011
Publisher: American Society of Mechanical Engineers
Paper No: PVP2011-57333
https://doi.org/10.1115/PVP2011-57333
View Paper titled, Creep Damage Assessment Procedure for Weldment Parts of P91 Boiler Piping in USC Plants: Part II—Validation of a Creep Damage Assessment Method Based on Void Growth Simulation
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Topics: Boilers, Creep, Damage assessment, Pipes, Pressure, Simulation, Steel
Proceedings Papers

Creep Damage Assessment Procedure for Weldment Parts of P91 Boiler Piping in USC Plants: Part I—Development of Stress Analysis Code for Boiler Piping Systems

Takayuki Sakai, Takashi Ogata
Proc. ASME. PVP2011, Volume 6: Materials and Fabrication, Parts A and B, 521-526, July 17–21, 2011
Publisher: American Society of Mechanical Engineers
Paper No: PVP2011-57438
https://doi.org/10.1115/PVP2011-57438
View Paper titled, Creep Damage Assessment Procedure for Weldment Parts of P91 Boiler Piping in USC Plants: Part I—Development of Stress Analysis Code for Boiler Piping Systems
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Topics: Boilers, Creep, Damage assessment, Finite element methods, Pipes, Piping systems, Pressure, Steel, Stress analysis (Engineering), Thermal expansion
Journal Articles

Damage Evolution and Life Prediction of a P91 Longitudinal Welded Tube Under Internal Pressure Creep

Takashi Ogata, Takayuki Sakai, Masatsugu Yaguchi
Journal: Journal of Pressure Vessel Technology
Publisher: ASME
Article Type: Research Papers
J. Pressure Vessel Technol. October 2010, 132(5): 051204.
https://doi.org/10.1115/1.4001688
Published Online: August 23, 2010
View Article titled, Damage Evolution and Life Prediction of a P91 Longitudinal Welded Tube Under Internal Pressure Creep
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Topics: Creep, Damage, Pressure, Rupture, Simulation, Stress, Pipes, Steel, Finite element analysis
Journal Articles

Life Prediction Method of CC and DS Ni Base Superalloys Under High Temperature Biaxial Fatigue Loading

Takashi Ogata
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. November 2010, 132(11): 112101.
https://doi.org/10.1115/1.4001085
Published Online: August 16, 2010
View Article titled, Life Prediction Method of CC and DS Ni Base Superalloys Under High Temperature Biaxial Fatigue Loading
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Topics: Blades, Failure, Fatigue, Fatigue life, Fatigue testing, Gas turbines, High temperature, Superalloys, Casting, Fracture (Materials)
Proceedings Papers

Effect of Constraint on Creep Crack Propagation of Mod. 9Cr-1Mo Steel Weld Joint

Masato Yamamoto, Naoki Miura, Takashi Ogata
Proc. ASME. PVP2009, Volume 6: Materials and Fabrication, Parts A and B, 1533-1539, July 26–30, 2009
Publisher: American Society of Mechanical Engineers
Paper No: PVP2009-77862
https://doi.org/10.1115/PVP2009-77862
View Paper titled, Effect of Constraint on Creep Crack Propagation of Mod. 9Cr-1Mo Steel Weld Joint
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Topics: Crack propagation, Creep, Steel, Fracture (Materials), Tunnel construction, Base metals, Deformation, Electromagnetic scattering, Geometry, Heat
Proceedings Papers

Life Prediction Method of CC and DS Ni Base Superalloys Under High Temperature Biaxial Fatigue Loading

Takashi Ogata, Takayuki Sakai
Proc. ASME. GT2009, Volume 6: Structures and Dynamics, Parts A and B, 107-113, June 8–12, 2009
Publisher: American Society of Mechanical Engineers
Paper No: GT2009-59069
https://doi.org/10.1115/GT2009-59069
View Paper titled, Life Prediction Method of CC and DS Ni Base Superalloys Under High Temperature Biaxial Fatigue Loading
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Topics: Blades, Fatigue, Gas turbines, High temperature, Superalloys
Proceedings Papers

A New Ultrasonic Inspection Technique for Flaw Depth Sizing Based on Short Path of Diffraction

Shan Lin, Hiroyuki Fukutomi, Takashi Ogata
Proc. ASME. PVP2007, Volume 5: High-Pressure Technology; Non-Destructive Evaluation; Student Paper Competition, 167-174, July 22–26, 2007
Publisher: American Society of Mechanical Engineers
Paper No: PVP2007-26833
https://doi.org/10.1115/PVP2007-26833
View Paper titled, A New Ultrasonic Inspection Technique for Flaw Depth Sizing Based on Short Path of Diffraction
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Topics: Diffraction, Inspection, Waves, Echoes, Transducers, Stainless steel, Stress corrosion cracking
Proceedings Papers

Effect of Microscopic Inhomogeneity on Creep-Fatigue Crack Propagation of Transversally Loaded Directionally Solidified Superalloy

Masato Yamamoto, Takayuki Kitamura, Takashi Ogata
Proc. ASME. PVP2007, Volume 9: Eighth International Conference on Creep and Fatigue at Elevated Temperatures, 315-321, July 22–26, 2007
Publisher: American Society of Mechanical Engineers
Paper No: CREEP2007-26467
https://doi.org/10.1115/CREEP2007-26467
View Paper titled, Effect of Microscopic Inhomogeneity on Creep-Fatigue Crack Propagation of Transversally Loaded Directionally Solidified Superalloy
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Topics: Crack propagation, Creep, Fatigue, Superalloys, Fracture (Materials), Deformation, Shapes, Stress, Blades, Cycles
Proceedings Papers

A Unified Anisotropic Constitutive Model for a Ni Base Directionally Solidified Superalloy

Masatsugu Yaguchi, Masato Yamamoto, Takashi Ogata
Proc. ASME. PVP2007, Volume 9: Eighth International Conference on Creep and Fatigue at Elevated Temperatures, 135-141, July 22–26, 2007
Publisher: American Society of Mechanical Engineers
Paper No: CREEP2007-26527
https://doi.org/10.1115/CREEP2007-26527
View Paper titled, A Unified Anisotropic Constitutive Model for a Ni Base Directionally Solidified Superalloy
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Topics: Anisotropy, Constitutive equations, Superalloys, Creep, Deformation, Plasticity, Crystals, Stress, Elastic constants, Elasticity
Proceedings Papers

Void Growth Simulation of a Steam Turbine Casing Material Under Creep and Creep-Fatigue Loading

Takashi Ogata
Proc. ASME. PVP2007, Volume 9: Eighth International Conference on Creep and Fatigue at Elevated Temperatures, 493-501, July 22–26, 2007
Publisher: American Society of Mechanical Engineers
Paper No: CREEP2007-26304
https://doi.org/10.1115/CREEP2007-26304
View Paper titled, Void Growth Simulation of a Steam Turbine Casing Material Under Creep and Creep-Fatigue Loading
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Topics: Casting, Creep, Fatigue, Simulation, Steam turbines, Steel
Proceedings Papers

Damage Evolution and Life Prediction of a P91 Longitudinal Welded Tube Under Internal Pressure Creep

Takashi Ogata, Takayuki Sakai, Masatsugu Yaguchi
Proc. ASME. PVP2008, Volume 6: Materials and Fabrication, Parts A and B, 1231-1240, July 27–31, 2008
Publisher: American Society of Mechanical Engineers
Paper No: PVP2008-61519
https://doi.org/10.1115/PVP2008-61519
View Paper titled, Damage Evolution and Life Prediction of a P91 Longitudinal Welded Tube Under Internal Pressure Creep
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Topics: Creep, Damage, Pressure, Simulation, Steel
eBook Chapter

Effect of Inhomogeneity in Aligned Grains on Creep-Fatigue Crack Opening and Propagation Behavior of Directionally Solidified Superalloy

Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2009
ISBN: 978-0-8031-3416-4
Open the PDF for Effect of Inhomogeneity in Aligned Grains on Creep-Fatigue Crack Opening and Propagation Behavior of Directionally Solidified Superalloy in another window
Journal Articles

Effect of Inhomogeneity in Aligned Grains on Creep-Fatigue Crack Opening and Propagation Behavior of Directionally Solidified Superalloy

Masato Yamamoto, Takayuki Kitamura, Takashi Ogata
Journal: Journal of ASTM International
Publisher: ASTM International
Article Type: Research-Article
J. ASTM Int.. January 2009, 6(1): 1–11.
https://doi.org/10.1520/JAI101539
Published Online: January 1, 2009
View Article titled, Effect of Inhomogeneity in Aligned Grains on Creep-Fatigue Crack Opening and Propagation Behavior of Directionally Solidified Superalloy
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Proceedings Papers

Biaxial Thermo Mechanical Fatigue Life Propety of a Ni Base DS Super Alloy

Takashi Ogata, Masato Yamamoto
Proc. ASME. GT2006, Volume 4: Cycle Innovations; Electric Power; Industrial and Cogeneration; Manufacturing Materials and Metallurgy, 979-984, May 8–11, 2006
Publisher: American Society of Mechanical Engineers
Paper No: GT2006-90758
https://doi.org/10.1115/GT2006-90758
View Paper titled, Biaxial Thermo Mechanical Fatigue Life Propety of a Ni Base DS Super Alloy
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Topics: Alloys, Blades, Coating processes, Coatings, Fatigue, Fatigue life, Gas turbines, Thermomechanics
Journal Articles

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

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
View Article titled, Biaxial Thermomechanical-Fatigue Life Property of a Directionally Solidified Ni-Base Superalloy
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Topics: Blades, Coatings, Creep, Failure, Fatigue, Fracture (Materials), Gas turbines, Superalloys, Thermomechanics, Waves
Proceedings Papers

Creep and Creep-Fatigue Strength Property of a Long-Term Used Boiler Weldment Parts of 2.25Cr-1Mo Steel

Takashi Ogata
Proc. ASME. PVP2002, Computational Weld Mechanics, Constraint, and Weld Fracture, 165-173, August 5–9, 2002
Publisher: American Society of Mechanical Engineers
Paper No: PVP2002-1120
https://doi.org/10.1115/PVP2002-1120
View Paper titled, Creep and Creep-Fatigue Strength Property of a Long-Term Used Boiler Weldment Parts of 2.25Cr-1Mo Steel
Open the PDF for Creep and Creep-Fatigue Strength Property of a Long-Term Used Boiler Weldment Parts of 2.25Cr-1Mo Steel in another window
Topics: Boilers, Creep, Fatigue, Steel, Failure, Rupture, Stress, Cavities, Damage, Dislocations