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Proceedings Papers

Study on the Applicability of GTN Model on Fracture Evaluation for Plate Specimen With a Surface Crack Using a BWR Reactor Pressure Vessel Material

Takuya Ogawa, Takahiro Hayashi, Shuichi Yoshida, Masao Itatani, Toshiyuki Saito
Proc. ASME. PVP2023, Volume 5: Materials & Fabrication, V005T06A062, July 16–21, 2023
Publisher: American Society of Mechanical Engineers
Paper No: PVP2023-107208
https://doi.org/10.1115/PVP2023-107208
View Paper titled, Study on the Applicability of GTN Model on Fracture Evaluation for Plate Specimen With a Surface Crack Using a BWR Reactor Pressure Vessel Material
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Topics: Alloys, Boiling water reactors, Damage mechanics, Fracture (Materials), Fracture mechanics, Reactor vessels, Stress corrosion cracking, Surface cracks
Proceedings Papers

Evaluation on Weldability of Nickel-Base Alloy Weld Materials With High Chromium Content

Yoshinori Katayama, Takahiro Hayashi, Daiki Tanaka, Hidenori Takahashi
Proc. ASME. ICONE29, Volume 10: Advanced Methods of Manufacturing for Nuclear Reactors and Components, V010T10A003, August 8–12, 2022
Publisher: American Society of Mechanical Engineers
Paper No: ICONE29-89096
https://doi.org/10.1115/ICONE29-89096
View Paper titled, Evaluation on Weldability of Nickel-Base Alloy Weld Materials With High Chromium Content
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Topics: Alloys, Cracking (Materials), Ductility, Fracture (Process), Nickel, Solidification
Proceedings Papers

Study on Ductile Crack Extension and Fracture Behavior in Plate Specimen With a Semi-Elliptical Surface Crack Using a BWR Reactor Pressure Vessel Material

Takahiro Hayashi, Takuya Ogawa, Shuichi Yoshida, Masao Itatani, Toshiyuki Saito
Proc. ASME. PVP2022, Volume 4B: Materials and Fabrication, V04BT06A020, July 17–22, 2022
Publisher: American Society of Mechanical Engineers
Paper No: PVP2022-84606
https://doi.org/10.1115/PVP2022-84606
View Paper titled, Study on Ductile Crack Extension and Fracture Behavior in Plate Specimen With a Semi-Elliptical Surface Crack Using a BWR Reactor Pressure Vessel Material
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Topics: Boiling water reactors, Ductile fracture, Fracture (Materials), Fracture (Process), Fracture mechanics, Metals, Reactor vessels, Stress corrosion cracking, Surface cracks
Proceedings Papers

Study on Fracture Behavior and Assessment for Dissimilar Metal Weld of Low Alloy Steel and Ni-Base Alloy Weld Using a BWR Reactor Pressure Vessel Material

Takahiro Hayashi, Takuya Ogawa, Shuichi Yoshida, Masao Itatani, Yasuhiro Hattori, Tetsushi Yamaoka, Shigeaki Tanaka, Toshiyuki Saito
Proc. ASME. PVP2021, Volume 4: Materials and Fabrication, V004T06A047, July 13–15, 2021
Publisher: American Society of Mechanical Engineers
Paper No: PVP2021-61467
https://doi.org/10.1115/PVP2021-61467
View Paper titled, Study on Fracture Behavior and Assessment for Dissimilar Metal Weld of Low Alloy Steel and Ni-Base Alloy Weld Using a BWR Reactor Pressure Vessel Material
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Topics: Alloy steel, Alloys, Boiling water reactors, Fracture (Materials), Fracture mechanics, Fracture toughness, Metals, Reactor vessels, Stress corrosion cracking
Proceedings Papers

SCC Growth Prediction for Surface Crack in Welded Joint Using Advanced FEA

Takuya Ogawa, Masao Itatani, Takahiro Hayashi, Toshiyuki Saito
Proc. ASME. PVP2020, Volume 6: Materials and Fabrication, V006T06A080, August 3, 2020
Publisher: American Society of Mechanical Engineers
Paper No: PVP2020-21670
https://doi.org/10.1115/PVP2020-21670
View Paper titled, SCC Growth Prediction for Surface Crack in Welded Joint Using Advanced FEA
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Topics: Finite element analysis, Surface cracks, Welded joints, Fracture (Materials), Fracture (Process), Shapes, Fitness-for-service, Metals, Stainless steel, Base metals
Proceedings Papers

Investigation on the Effects of Carbon Macro-Segregation of Mechanical Properties Using a Large-Scale Forged Low Alloy Steel for a BWR Reactor Pressure Vessel

Takahiro Hayashi, Takuya Ogawa, Rie Sumiya, Tetsushi Yamaoka, Shigeaki Tanaka, Yasuhiro Hattori, Atsushi Mori
Proc. ASME. PVP2020, Volume 6: Materials and Fabrication, V006T06A082, August 3, 2020
Publisher: American Society of Mechanical Engineers
Paper No: PVP2020-21857
https://doi.org/10.1115/PVP2020-21857
View Paper titled, Investigation on the Effects of Carbon Macro-Segregation of Mechanical Properties Using a Large-Scale Forged Low Alloy Steel for a BWR Reactor Pressure Vessel
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Topics: Alloy steel, Boiling water reactors, Carbon, Fracture toughness, Iron and steel making, Mechanical properties, Pressure vessels, Reactor vessels
Proceedings Papers

Fracture Toughness Criteria of Irradiated Austenitic Stainless Steels for Structural Integrity Evaluation of BWR Internal Components

Takahiro Hayashi, Shigeaki Tanaka, Tomonori Abe, Seiji Sakuraya, Suguru Ooki, Takayuki Kaminaga
Proc. ASME. PVP2019, Volume 6B: Materials and Fabrication, V06BT06A017, July 14–19, 2019
Publisher: American Society of Mechanical Engineers
Paper No: PVP2019-93441
https://doi.org/10.1115/PVP2019-93441
View Paper titled, Fracture Toughness Criteria of Irradiated Austenitic Stainless Steels for Structural Integrity Evaluation of BWR Internal Components
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Topics: Boiling water reactors, Fracture toughness, Irradiation (Radiation exposure), Neutrons, Stainless steel
Journal Articles

Detection of a Defect on the Back of a Pipe by Noncontact Remote Measurements

Takahiro Hayashi
Journal: Journal of Pressure Vessel Technology
Publisher: ASME
Article Type: Research-Article
J. Pressure Vessel Technol. December 2018, 140(6): 061401.
Paper No: PVT-17-1081
https://doi.org/10.1115/1.4041433
Published Online: November 12, 2018
View Article titled, Detection of a Defect on the Back of a Pipe by Noncontact Remote Measurements
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Topics: Pipes, Resonance, Lasers, Waves
Proceedings Papers

SCC Crack Growth Analysis for a Dissimilar Metal Weld Using Advanced FEA

Takuya Ogawa, Masao Itatani, Takahiro Hayashi, Toshiyuki Saito
Proc. ASME. PVP2018, Volume 6A: Materials and Fabrication, V06AT06A001, July 15–20, 2018
Publisher: American Society of Mechanical Engineers
Paper No: PVP2018-84513
https://doi.org/10.1115/PVP2018-84513
View Paper titled, SCC Crack Growth Analysis for a Dissimilar Metal Weld Using Advanced FEA
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Topics: Finite element analysis, Fracture (Materials), Metals, Boiling water reactors, Fitness-for-service, Japan Society of Mechanical Engineers, Pressurized water reactors, Stress corrosion cracking, Anisotropy, Finite element model
Journal Articles

Adhesive Bond Imaging by Noncontact Measurements With Single-Sided Access

Shogo Nakao, Takahiro Hayashi
Journal: Journal of Nondestructive Evaluation, Diagnostics and Prognostics of Engineering Systems
Publisher: ASME
Article Type: Research-Article
ASME J Nondestructive Evaluation. May 2018, 1(2): 021009–021009-5.
Paper No: NDE-17-1098
https://doi.org/10.1115/1.4039229
Published Online: February 23, 2018
View Article titled, Adhesive Bond Imaging by Noncontact Measurements With Single-Sided Access
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Topics: Adhesives, Imaging, Plates (structures), Waves, Flat plates, Lasers
Proceedings Papers

Technical Basis for the Exemptions to Mandatory Post Weld Heat Treatment (PWHT) of SA-738 Grade B for Sec. III Div. 1 Subsection NE Application

Takahiro Hayashi, Charles C. Kim, Kohki Kumagai, Mitsuhiro Goto, Shiro Otake
Proc. ASME. PVP2017, Volume 6B: Materials and Fabrication, V06BT06A025, July 16–20, 2017
Publisher: American Society of Mechanical Engineers
Paper No: PVP2017-65694
https://doi.org/10.1115/PVP2017-65694
View Paper titled, Technical Basis for the Exemptions to Mandatory Post Weld Heat Treatment (PWHT) of SA-738 Grade B for Sec. III Div. 1 Subsection NE Application
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Topics: Heat treating (Metalworking), ASME Boiler and Pressure Vessel Code, Fracture toughness, Iron and steel making, Materials properties, Plates (structures), Process control, Steel, Structural elements (Construction), Welding
Proceedings Papers

Retardation Effect of Cyclic Overload on Stress Corrosion Crack Growth in Stainless Steel

Toshiyuki Saito, Takahiro Hayashi, Chihiro Narazaki, Mikiro Itow
Proc. ASME. PVP2017, Volume 6B: Materials and Fabrication, V06BT06A062, July 16–20, 2017
Publisher: American Society of Mechanical Engineers
Paper No: PVP2017-65968
https://doi.org/10.1115/PVP2017-65968
View Paper titled, Retardation Effect of Cyclic Overload on Stress Corrosion Crack Growth in Stainless Steel
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Topics: Stainless steel, Stress corrosion cracking, Boiling water reactors, Fitness-for-service, Stress, Earthquakes, Fracture (Materials), Japan Society of Mechanical Engineers, Nuclear power stations, Welding
Proceedings Papers

Evaluation of Fracture Characteristics of Ni-Base Weld Metal for BWR Components

Masao Itatani, Toshiyuki Saito, Takahiro Hayashi, Chihiro Narazaki, Kazuo Ogawa, Masaaki Kikuchi
Proc. ASME. PVP2009, Volume 1: Codes and Standards, 419-427, July 26–30, 2009
Publisher: American Society of Mechanical Engineers
Paper No: PVP2009-77720
https://doi.org/10.1115/PVP2009-77720
View Paper titled, Evaluation of Fracture Characteristics of Ni-Base Weld Metal for BWR Components
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Topics: Boiling water reactors, Fracture (Materials), Fracture (Process), Metals, Stress, Alloys, Ductile fracture, Flow (Dynamics), Fracture toughness, Temperature
Proceedings Papers

Fracture Assessment of Austenitic Stainless Steel Piping With Twin Flaws in TIG Weld

Masao Itatani, Chihiro Narazaki, Takahiro Hayashi, Toshiyuki Saito, Takuya Ogawa
Proc. ASME. PVP2009, Volume 1: Codes and Standards, 215-221, July 26–30, 2009
Publisher: American Society of Mechanical Engineers
Paper No: PVP2009-77717
https://doi.org/10.1115/PVP2009-77717
View Paper titled, Fracture Assessment of Austenitic Stainless Steel Piping With Twin Flaws in TIG Weld
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Topics: Fracture (Materials), Pipes, Stainless steel, Stress, Fracture (Process), Boiling water reactors, Electrical discharge machining, Base metals, Failure, Metals
Proceedings Papers

Evaluation for Environmental Fatigue of Notched Specimen of Ni-Base Alloy

Masao Itatani, Katsumi Sakaguchi, Toshiyuki Saito, Takahiro Hayashi
Proc. ASME. PVP2007, Volume 1: Codes and Standards, 213-218, July 22–26, 2007
Publisher: American Society of Mechanical Engineers
Paper No: PVP2007-26379
https://doi.org/10.1115/PVP2007-26379
View Paper titled, Evaluation for Environmental Fatigue of Notched Specimen of Ni-Base Alloy
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Topics: Alloys, Fatigue, Water, Fatigue life, Stress, Finite element methods, Fatigue testing, High temperature, Carbon steel, Crack propagation
Proceedings Papers

Evaluation of Stress Intensity Factor for Transverse Cracks in Weld Joint of BWR Shroud Support and Its Application to the Evaluation of Trapezoidal Crack

Masao Itatani, Toshiyuki Saito, Takahiro Hayashi, Chihiro Narazaki, Kazuo Ogawa
Proc. ASME. PVP2008, Volume 6: Materials and Fabrication, Parts A and B, 1143-1150, July 27–31, 2008
Publisher: American Society of Mechanical Engineers
Paper No: PVP2008-61456
https://doi.org/10.1115/PVP2008-61456
View Paper titled, Evaluation of Stress Intensity Factor for Transverse Cracks in Weld Joint of BWR Shroud Support and Its Application to the Evaluation of Trapezoidal Crack
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Topics: Boiling water reactors, Fracture (Materials), Stress, Alloys, Metals, Evaluation methods, Shapes, Base metals, Engineering standards, Finite element methods
Proceedings Papers

Welding Residual Stress Analysis Using Axisymmetric Modeling for Shroud Support Structure

Kazuo Ogawa, Yukihiko Okuda, Toshiyuki Saito, Takahiro Hayashi, Rie Sumiya
Proc. ASME. PVP2008, Volume 6: Materials and Fabrication, Parts A and B, 289-297, July 27–31, 2008
Publisher: American Society of Mechanical Engineers
Paper No: PVP2008-61148
https://doi.org/10.1115/PVP2008-61148
View Paper titled, Welding Residual Stress Analysis Using Axisymmetric Modeling for Shroud Support Structure
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Topics: Modeling, Stress analysis (Engineering), Welding, Boiling water reactors, Stress, Manufacturing, Welded joints, Fracture (Materials), Residual stresses, Safety
Proceedings Papers

Ultrasonic Flexural Torsional Guided Wave Pipe Inspection Potential

Zongqi Sun, Li Zhang, Brian Gavigan, Takahiro Hayashi, Joseph L. Rose
Proc. ASME. PVP2003, Ultrasonic Nondestructive Evaluation for Material Science and Industries, 29-34, July 20–24, 2003
Publisher: American Society of Mechanical Engineers
Paper No: PVP2003-1849
https://doi.org/10.1115/PVP2003-1849
View Paper titled, Ultrasonic Flexural Torsional Guided Wave Pipe Inspection Potential
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Topics: Inspection, Pipes, Waves, Computation, Excitation, Shapes
Proceedings Papers

Guided Wave Propagation Mechanics Across a Pipe Elbow

Takahiro Hayashi, Koichiro Kawashima, Zongqi Sun, Joseph L. Rose
Proc. ASME. PVP2003, Ultrasonic Nondestructive Evaluation for Material Science and Industries, 43-47, July 20–24, 2003
Publisher: American Society of Mechanical Engineers
Paper No: PVP2003-1851
https://doi.org/10.1115/PVP2003-1851
View Paper titled, Guided Wave Propagation Mechanics Across a Pipe Elbow
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Topics: Pipes, Wave propagation, Waves, Finite element methods, Computer simulation, Echoes, Modeling, Nondestructive evaluation
Proceedings Papers

Guided Wave Focusing Mechanics in Pipe

Takahiro Hayashi, Koichiro Kawashima, Zongqi Sun, Joseph L. Rose
Proc. ASME. PVP2003, Ultrasonic Nondestructive Evaluation for Material Science and Industries, 35-41, July 20–24, 2003
Publisher: American Society of Mechanical Engineers
Paper No: PVP2003-1850
https://doi.org/10.1115/PVP2003-1850
View Paper titled, Guided Wave Focusing Mechanics in Pipe
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Topics: Pipes, Waves, Finite element methods, Inspection, Reflection