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John Siefert
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Proceedings Papers

Evaluation of Service Removed HP40-Modified Reformer Tubes and Development of Multi-Axial Pressurization Testing in Full-Size Components

Alex Bridges, Eeva Griscom, Michael Gagliano, John Siefert, Jorge Penso, Jordan Barrass
Proc. ASME. PVP2024, Volume 4: Materials & Fabrication, V004T06A092, July 28–August 2, 2024
Publisher: American Society of Mechanical Engineers
Paper No: PVP2024-123527
https://doi.org/10.1115/PVP2024-123527
View Paper titled, Evaluation of Service Removed HP40-Modified Reformer Tubes and Development of Multi-Axial Pressurization Testing in Full-Size Components
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Topics: Creep, Testing, High temperature, Temperature, Casting, Damage, Ductility, Furnaces, Heat, Heat resistant materials
Proceedings Papers

Challenges in the Life Management of Steam Methane Reformer (SMR) Components

Alex Bridges, Michael Gagliano, John Siefert, Mitul Dalal, Jorge Penso
Proc. ASME. PVP2023, Volume 5: Materials & Fabrication, V005T06A058, July 16–21, 2023
Publisher: American Society of Mechanical Engineers
Paper No: PVP2023-106623
https://doi.org/10.1115/PVP2023-106623
View Paper titled, Challenges in the Life Management of Steam Methane Reformer (SMR) Components
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Topics: Creep, Methane, Steam
Proceedings Papers

Metallurgical Characterization of a 114,000-Hour Service-Aged Forge 91-Pipe 91 Steel Header Weldment

Yiyu Wang, Wei Zhang, Yanli Wang, Zhili Feng, John Siefert, Alex Bridges, Steven Kung
Proc. ASME. PVP2022, Volume 4B: Materials and Fabrication, V04BT06A021, July 17–22, 2022
Publisher: American Society of Mechanical Engineers
Paper No: PVP2022-85319
https://doi.org/10.1115/PVP2022-85319
View Paper titled, Metallurgical Characterization of a 114,000-Hour Service-Aged Forge 91-Pipe 91 Steel Header Weldment
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Topics: Pipes, Steel, Creep, Cavities, Damage, Base metals, Coal, Cracking (Materials), Density, Fracture (Process)
Proceedings Papers

Correlation of Plain and Notched Bar Creep Behavior in Grade 91 Steel

Yukio Takahashi, Haruhisa Shigeyama, John Siefert
Proc. ASME. PVP2019, Volume 6A: Materials and Fabrication, V06AT06A041, July 14–19, 2019
Publisher: American Society of Mechanical Engineers
Paper No: PVP2019-94007
https://doi.org/10.1115/PVP2019-94007
View Paper titled, Correlation of Plain and Notched Bar Creep Behavior in Grade 91 Steel
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Topics: Creep, Steel, Stress
Proceedings Papers

Creep Deformation Analyses for Grade 91 Steels Considering Heat-to-Heat Variation

Haruhisa Shigeyama, Yukio Takahashi, John Siefert, Jonathan Parker
Proc. ASME. PVP2018, Volume 6A: Materials and Fabrication, V06AT06A059, July 15–20, 2018
Publisher: American Society of Mechanical Engineers
Paper No: PVP2018-85058
https://doi.org/10.1115/PVP2018-85058
View Paper titled, Creep Deformation Analyses for Grade 91 Steels Considering Heat-to-Heat Variation
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Topics: Creep, Heat, Steel, Rupture, Heat resistant materials, Power stations, Stress concentration
Proceedings Papers

Effect of Simulated Heat Affected Zone Thermal Cycle on the Creep Deformation and Damage Response of Grade 91 Steel Including Heat-to-Heat Variation

Yukio Takahashi, Haruhisa Shigeyama, John Siefert, Jonathan Parker
Proc. ASME. PVP2018, Volume 6A: Materials and Fabrication, V06AT06A061, July 15–20, 2018
Publisher: American Society of Mechanical Engineers
Paper No: PVP2018-85102
https://doi.org/10.1115/PVP2018-85102
View Paper titled, Effect of Simulated Heat Affected Zone Thermal Cycle on the Creep Deformation and Damage Response of Grade 91 Steel Including Heat-to-Heat Variation
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Topics: Creep, Cycles, Damage, Heat, Steel, Metals, Base metals, Failure, Cracking (Materials), Ductility
Proceedings Papers

Complexities of In-Service Failures in Dissimilar Metal Welds Between Grade 91 and Austenitic Stainless Steels

John Siefert, Jonathan Parker, Terry Totemeier
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, V005T12A009, July 17–21, 2016
Publisher: American Society of Mechanical Engineers
Paper No: PVP2016-63982
https://doi.org/10.1115/PVP2016-63982
View Paper titled, Complexities of In-Service Failures in Dissimilar Metal Welds Between Grade 91 and Austenitic Stainless Steels
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Topics: Failure, Metals, Stainless steel, Welded joints, Temperature, Heat recovery steam generators, Pressure, Steam, Design, Electricity (Physics)
Proceedings Papers

PM-HIP Research for Pressure Retaining Applications Within the Electric Power Industry

David Gandy, John Siefert, Lou Lherbier, David Novotnak
Proc. ASME. SMR2014, ASME 2014 Small Modular Reactors Symposium, V001T06A001, April 15–17, 2014
Publisher: American Society of Mechanical Engineers
Paper No: SMR2014-3305
https://doi.org/10.1115/SMR2014-3305
View Paper titled, PM-HIP Research for Pressure Retaining Applications Within the Electric Power Industry
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Topics: Electricity (Physics), Pressure, Alloys, Manufacturing, ASME Boiler and Pressure Vessel Code, Casting, Creep, Extruding, Forging, Hardening
Journal Articles

Assessment of the Tempering Behavior of Grade 91 Steel

Jonathan Parker, John Siefert, Kent Coleman
Journal: Materials Performance and Characterization
Publisher: ASTM International
Article Type: Research-Article
Matls. Perf. Charact.. May 2013, 2(1): 163–173.
Paper No: MPC20120039
https://doi.org/10.1520/MPC20120039
Published Online: May 31, 2013
View Article titled, Assessment of the Tempering Behavior of Grade 91 Steel
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