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Proceedings Papers

Change of Crack Initiation and Propagation Modes in Hydrogen-Related Failure of a Precipitation-Strengthened Ni-Based Superalloy 718 Under Internal and External Hydrogen Conditions

Yuhei Ogawa, Osamu Takakuwa, Saburo Okazaki, Saburo Matsuoka, Hisao Matsunaga
Proc. ASME. PVP2019, Volume 6B: Materials and Fabrication, V06BT06A025, July 14–19, 2019
Paper No: PVP2019-93204
DOI: https://doi.org/10.1115/PVP2019-93204
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Topics: Failure, Fracture (Materials), Hydrogen, Precipitation, Superalloys, Fracture (Process), Ductility, Deformation, Annealing, Brittleness
Proceedings Papers

Temperature Dependence of Fatigue Crack Growth in Low-Carbon Steel Under Gaseous Hydrogen

Osamu Takakuwa, Yuhei Ogawa, Saburo Okazaki, Hisao Matsunaga, Saburo Matsuoka
Proc. ASME. PVP2019, Volume 6B: Materials and Fabrication, V06BT06A029, July 14–19, 2019
Paper No: PVP2019-93451
DOI: https://doi.org/10.1115/PVP2019-93451
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Topics: Carbon, Fatigue cracks, Hydrogen, Steel, Temperature effects, Plasticity, Temperature, Fracture (Materials), Electron backscatter diffraction, Wakes
Proceedings Papers

Fatigue Life Properties of Circumferentially-Notched Bar of Austenitic Stainless Steel With Various Concentration Factors

Naoaki Nagaishi, Michio Yoshikawa, Saburo Okazaki, Hisao Matsunaga, Junichiro Yamabe, Saburo Matsuoka
Proc. ASME. PVP2018, Volume 6B: Materials and Fabrication, V06BT06A032, July 15–20, 2018
Paper No: PVP2018-84420
DOI: https://doi.org/10.1115/PVP2018-84420
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Topics: Fatigue life, Stainless steel, Stress, Fatigue testing, Stress concentration, Constitutive equations, Deformation, Finite element analysis, Temperature
Proceedings Papers

Temperature Dependence of Fatigue Crack Growth in Low-Alloy Steel Under Gaseous Hydrogen

Osamu Takakuwa, Saburo Matsuoka, Saburo Okazaki, Michio Yoshikawa, Junichiro Yamabe, Hisao Matsunaga
Proc. ASME. PVP2018, Volume 6B: Materials and Fabrication, V06BT06A033, July 15–20, 2018
Paper No: PVP2018-84438
DOI: https://doi.org/10.1115/PVP2018-84438
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Topics: Alloys, Fatigue cracks, Hydrogen, Steel, Temperature effects, Temperature, Binding energy, Dislocations, Pressure, ASTM International
Proceedings Papers

Influence of Hydrogen on Tensile and Fatigue Life Properties of 304/308 Austenitic Stainless Steel Butt Welded Joints

Saburo Okazaki, Hisao Matsunaga, Masami Nakamura, Shigeru Hamada, Saburo Matsuoka
Proc. ASME. PVP2018, Volume 6B: Materials and Fabrication, V06BT06A038, July 15–20, 2018
Paper No: PVP2018-84781
DOI: https://doi.org/10.1115/PVP2018-84781
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Topics: Fatigue life, Hydrogen, Stainless steel, Welded joints, Fatigue limit, Martensitic transformations, Fatigue testing, Ferrites (Magnetic materials), Base metals, Elongation
Proceedings Papers

Fatigue Life Properties of Circumferentially-Notched, Type 304 Austenitic Stainless Steel in Hydrogen Gas

Naoaki Nagaishi, Michio Yoshikawa, Saburo Okazaki, Hisao Matsunaga, Junichiro Yamabe, Saburo Matsuoka
Proc. ASME. PVP2017, Volume 6B: Materials and Fabrication, V06BT06A036, July 16–20, 2017
Paper No: PVP2017-65450
DOI: https://doi.org/10.1115/PVP2017-65450
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Topics: Fatigue life, Hydrogen, Stainless steel, Alloys, Deformation, Fatigue limit, Fatigue testing, Fracture (Materials), Pressure, Steel
Proceedings Papers

A Case Study of a Cooling Pipe for a Pre-Cooler Used in a 70-MPa Hydrogen Station

Saburo Okazaki, Hisao Matsunaga, Shigeru Hamada, Masami Nakamura, Hisatake Itoga, Saburo Matsuoka
Proc. ASME. PVP2017, Volume 6B: Materials and Fabrication, V06BT06A035, July 16–20, 2017
Paper No: PVP2017-65435
DOI: https://doi.org/10.1115/PVP2017-65435
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Topics: Cooling, Hydrogen, Pipes, Nitrogen, Base metals, Gas tungsten arc welding, Filler metals, Fracture (Materials), Fracture (Process), Temperature