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A. Toshimitsu Yokobori
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Proceedings Papers

Effect of Pre-Heat Treatment on Hydrogen Concentration Behavior of y-Grooved Weld Joint Based on a Coupled Analysis of Heat Transfer-Thermal Stress-Hydrogen Diffusion

Go Ozeki, A. Toshimitsu Yokobori, Jr., Toshihito Ohmi, Tadashi Kasuya, Nobuyuki Ishikawa, Satoshi Minamoto, Manabu Enoki
Proc. ASME. PVP2018, Volume 1A: Codes and Standards, V01AT01A037, July 15–20, 2018
Publisher: American Society of Mechanical Engineers
Paper No: PVP2018-84178
https://doi.org/10.1115/PVP2018-84178
View Paper titled, Effect of Pre-Heat Treatment on Hydrogen Concentration Behavior of y-Grooved Weld Joint Based on a Coupled Analysis of Heat Transfer-Thermal Stress-Hydrogen Diffusion
Open the PDF for Effect of Pre-Heat Treatment on Hydrogen Concentration Behavior of y-Grooved Weld Joint Based on a Coupled Analysis of Heat Transfer-Thermal Stress-Hydrogen Diffusion in another window
Topics: Diffusion (Physics), Heat, Hydrogen, Stress, Thermal stresses, Cooling, Heat transfer, Temperature, Cracking (Materials), Finite element methods
Proceedings Papers

Hydrogen Diffusion Concentration Behaviors for Square Groove Weld Joint

Toshihito Ohmi, A. Toshimitsu Yokobori, Jr., Go Ozeki, Tadashi Kasuya, Nobuyuki Ishikawa, Satoshi Minamoto, Manabu Enoki
Proc. ASME. PVP2018, Volume 1A: Codes and Standards, V01AT01A038, July 15–20, 2018
Publisher: American Society of Mechanical Engineers
Paper No: PVP2018-84192
https://doi.org/10.1115/PVP2018-84192
View Paper titled, Hydrogen Diffusion Concentration Behaviors for Square Groove Weld Joint
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Topics: Diffusion (Physics), Hydrogen, Thermal stresses, Cooling, Cracking (Materials), Fracture (Process), Heat transfer, Heat, Hydrogen embrittlement, Metals
eBook Chapter

Effect of Hydrogen Pressure on Fatigue Crack Growth and Hydrogen Accumulation Behavior of High Strength Steel

Series: ASME Press Select Proceedings
Publisher: ASME Press
Published: 2017
https://doi.org/10.1115/1.861387_ch70
ISBN: 9780791861387
Open the PDF for Effect of Hydrogen Pressure on Fatigue Crack Growth and Hydrogen Accumulation Behavior of High Strength Steel in another window
Topics: Fatigue cracks, High strength steel, Hydrogen, Pressure
Proceedings Papers

The Law of Crack Growth Life Under Load Controlled Creep-Fatigue Conditions for W-Added 12% Cr Steel

Yoshiko Nagumo, A. Toshimitsu Yokobori, Jr., Takahiro Fukuda, Yoshiki Takahashi, Ryuji Sugiura
Proc. ASME. PVP2016, Volume 6A: Materials and Fabrication, V06AT06A060, July 17–21, 2016
Publisher: American Society of Mechanical Engineers
Paper No: PVP2016-63484
https://doi.org/10.1115/PVP2016-63484
View Paper titled, The Law of Crack Growth Life Under Load Controlled Creep-Fatigue Conditions for W-Added 12% Cr Steel
Open the PDF for The Law of Crack Growth Life Under Load Controlled Creep-Fatigue Conditions for W-Added 12% Cr Steel in another window
Topics: Creep, Fatigue, Fracture (Materials), Steel, Stress, Specialty steels, Cycles, Equilibrium (Physics), Rotors, Temperature
Proceedings Papers

Creep Damage Formation and Crack Initiation / Growth Behavior of Notched Specimen for Directionally Solidified Ni-Base Superalloy by Interrupted Observation

Go Ozeki, A. Toshimitsu Yokobori, Jr., Takashi Matsuzaki
Proc. ASME. PVP2016, Volume 5: High-Pressure Technology; Rudy Scavuzzo Student Paper Symposium and 24th Annual Student Paper Competition; ASME Nondestructive Evaluation, Diagnosis and Prognosis Division (NDPD); Electric Power Research Institute (EPRI) Creep Fatigue Workshop, V005T12A002, July 17–21, 2016
Publisher: American Society of Mechanical Engineers
Paper No: PVP2016-63380
https://doi.org/10.1115/PVP2016-63380
View Paper titled, Creep Damage Formation and Crack Initiation / Growth Behavior of Notched Specimen for Directionally Solidified Ni-Base Superalloy by Interrupted Observation
Open the PDF for Creep Damage Formation and Crack Initiation / Growth Behavior of Notched Specimen for Directionally Solidified Ni-Base Superalloy by Interrupted Observation in another window
Topics: Creep, Damage, Fracture (Materials), Superalloys, Electron backscatter diffraction, Blades, Finite element analysis, Gas turbines, High temperature creep, Cooling
Proceedings Papers

Hydrogen Diffusion Analysis in the Fatigue Crack Growth Test Under High Pressure Hydrogen

Nobuyuki Ishikawa, Toshihito Ohmi, A. Toshimitsu Yokobori
Proc. ASME. PVP2015, Volume 6B: Materials and Fabrication, V06BT06A025, July 19–23, 2015
Publisher: American Society of Mechanical Engineers
Paper No: PVP2015-45809
https://doi.org/10.1115/PVP2015-45809
View Paper titled, Hydrogen Diffusion Analysis in the Fatigue Crack Growth Test Under High Pressure Hydrogen
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Topics: Diffusion (Physics), Fatigue cracks, High pressure (Physics), Hydrogen, Hydrogen embrittlement, Fracture (Materials), Stress, Computer simulation, Numerical analysis, Particulate matter
Proceedings Papers

Hydrogen-Assisted Cracking Threshold of High-Strength Low-Alloy Steel

Yusuke Yanagisawa, Wada Yoru, Toshihito Ohmi, A. Toshimitsu Yokobori
Proc. ASME. PVP2015, Volume 6B: Materials and Fabrication, V06BT06A014, July 19–23, 2015
Publisher: American Society of Mechanical Engineers
Paper No: PVP2015-45337
https://doi.org/10.1115/PVP2015-45337
View Paper titled, Hydrogen-Assisted Cracking Threshold of High-Strength Low-Alloy Steel
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Topics: Alloys, Cracking (Materials), Fracture (Process), Hydrogen, Steel, Stress, Displacement, Fracture (Materials), Brittle fracture, Diffusion (Physics)
Proceedings Papers

The Quantitative Estimation of the Sensitivity of Corrosion and Hydrogen Environment on Fatigue Crack Growth Rate for Steels

Mikihito Ishikawa, A. Toshimitsu Yokobori, Jr., Yusuke Kawashima, Toshihito Ohmi, Seiji Sugawara
Proc. ASME. PVP2014, Volume 6B: Materials and Fabrication, V06BT06A017, July 20–24, 2014
Publisher: American Society of Mechanical Engineers
Paper No: PVP2014-28581
https://doi.org/10.1115/PVP2014-28581
View Paper titled, The Quantitative Estimation of the Sensitivity of Corrosion and Hydrogen Environment on Fatigue Crack Growth Rate for Steels
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Topics: Corrosion, Fatigue cracks, Hydrogen, Steel, Fatigue testing, Hydrogen embrittlement, Dislocations, Fracture (Materials), Fracture (Process)
Proceedings Papers

Effect of Material Microstructure on Creep Damage Formation Behavior for Ni-Base Directionally Solidified Superalloy

Go Ozeki, Ryuji Sugiura, A. Toshimitsu Yokobori, Jr., Yoshiko Nagumo, Hiroaki Takeuchi, Takashi Matsuzaki
Proc. ASME. PVP2013, Volume 6A: Materials and Fabrication, V06AT06A037, July 14–18, 2013
Publisher: American Society of Mechanical Engineers
Paper No: PVP2013-97808
https://doi.org/10.1115/PVP2013-97808
View Paper titled, Effect of Material Microstructure on Creep Damage Formation Behavior for Ni-Base Directionally Solidified Superalloy
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Topics: Creep, Damage, Superalloys, Fracture (Materials), Electron backscatter diffraction, Blades, Finite element analysis, Gas turbines
Proceedings Papers

Effect of Multi-Axial Stress on Creep Damage Behavior for Notched Specimen of P92 Steel

Haruhisa Shigeyama, Ryuji Sugiura, A. Toshimitsu Yokobori, Jr., Takashi Matsuzaki
Proc. ASME. PVP2013, Volume 6A: Materials and Fabrication, V06AT06A031, July 14–18, 2013
Publisher: American Society of Mechanical Engineers
Paper No: PVP2013-97486
https://doi.org/10.1115/PVP2013-97486
View Paper titled, Effect of Multi-Axial Stress on Creep Damage Behavior for Notched Specimen of P92 Steel
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Topics: Creep, Damage, Steel, Stress, Fracture (Materials), Finite element analysis, Hydrostatics, Vickers hardness testing
Journal Articles

Characterization of Structural Embrittlement of Creep Crack Growth for W-Added 12%Cr Ferritic Heat-Resistant Steel Related to the Multiaxial Stress

Ryuji Sugiura, A. Toshimitsu Yokobori, Jr., Masaaki Tabuchi, Akio Fuji, Takeshi Adachi
Journal: Journal of Engineering Materials and Technology
Publisher: ASME
Article Type: Research Papers
J. Eng. Mater. Technol. January 2009, 131(1): 011004.
https://doi.org/10.1115/1.3026544
Published Online: December 17, 2008
View Article titled, Characterization of Structural Embrittlement of Creep Crack Growth for W-Added 12%Cr Ferritic Heat-Resistant Steel Related to the Multiaxial Stress
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Topics: Creep, Fracture (Materials), Stress, Steel
Journal Articles

Parametric Representation of Crack Growth Rate Under Creep, Fatigue and Creep-Fatigue Interaction at High Temperatures

A. Toshimitsu Yokobori, Jr., Takeo Yokobori, Hideo Tomizawa, Hiroshi Sakata
Journal: Journal of Engineering Materials and Technology
Publisher: ASME
Article Type: Research Papers
J. Eng. Mater. Technol. January 1983, 105(1): 13–15.
https://doi.org/10.1115/1.3225611
Published Online: January 1, 1983
View Article titled, Parametric Representation of Crack Growth Rate Under Creep, Fatigue and Creep-Fatigue Interaction at High Temperatures
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Topics: Creep, Fatigue, Fracture (Materials), High temperature