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Proceedings Papers

Improving the Fatigue Life of an Additively Manufactured Stainless-Steel Specimen Using a Secondary Grinding Process

Murali Krishnan Ramachandran, Safia Alam Sumaiya, Mandar Golvaskar, Julia Wood, Isaac Sluder, Chandra Sekhar Rakurty, Nithin Rangasamy, Onome Scott Emuakpor, Manigandan Kannan
Proc. ASME. GT2024, Volume 9: Manufacturing Materials and Metallurgy; Microturbines, Turbochargers, and Small Turbomachines; Oil & Gas Applications; Steam Turbine, V009T17A011, June 24–28, 2024
Publisher: American Society of Mechanical Engineers
Paper No: GT2024-124342
https://doi.org/10.1115/GT2024-124342
View Paper titled, Improving the Fatigue Life of an Additively Manufactured Stainless-Steel Specimen Using a Secondary Grinding Process
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Topics: Additive manufacturing, Fatigue, Fatigue life, Grinding, Stainless steel, Stress, Cooling, High cycle fatigue, Surface roughness, Manufacturing
Proceedings Papers

Mechanical Performance and Material Characterization of Fused Filament Fabricated ABD 900 Superalloy

Sanna F. Siddiqui, Dustin Fandetti, Onome Scott-Emuakpor
Proc. ASME. GT2024, Volume 10A: Structures and Dynamics — Aerodynamics Excitation and Damping; Bearing and Seal Dynamics; Emerging Methods in Engineering Design, Analysis, and Additive Manufacturing, V10AT23A002, June 24–28, 2024
Publisher: American Society of Mechanical Engineers
Paper No: GT2024-121425
https://doi.org/10.1115/GT2024-121425
View Paper titled, Mechanical Performance and Material Characterization of Fused Filament Fabricated ABD 900 Superalloy
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Topics: Equipment performance, Superalloys, Additive manufacturing, Manufacturing, Nickel, Geometry, Metals, Particulate matter, Sintering, Temperature
Proceedings Papers

Applying Rapid Qualification to Fatigue Assessment of a Binder Jet Superalloy

Onome Scott-Emuakpor, Philip Johnson, Mattia Forgiarini, Tim Noronha
Proc. ASME. GT2024, Volume 9: Manufacturing Materials and Metallurgy; Microturbines, Turbochargers, and Small Turbomachines; Oil & Gas Applications; Steam Turbine, V009T17A020, June 24–28, 2024
Publisher: American Society of Mechanical Engineers
Paper No: GT2024-128276
https://doi.org/10.1115/GT2024-128276
View Paper titled, Applying Rapid Qualification to Fatigue Assessment of a Binder Jet Superalloy
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Topics: Additive manufacturing, Binders (Materials), Fatigue, Fatigue testing, Gas turbines, Superalloys
Proceedings Papers

Novel Microturbine Engine Test Stand for Rapid Assessment of New Materials and Manufacturing Procedures

Troy Krizak, Onome Scott-Emuakpor, Philip Johnson, Kiran D’Souza
Proc. ASME. GT2024, Volume 10A: Structures and Dynamics — Aerodynamics Excitation and Damping; Bearing and Seal Dynamics; Emerging Methods in Engineering Design, Analysis, and Additive Manufacturing, V10AT23A006, June 24–28, 2024
Publisher: American Society of Mechanical Engineers
Paper No: GT2024-125114
https://doi.org/10.1115/GT2024-125114
View Paper titled, Novel Microturbine Engine Test Stand for Rapid Assessment of New Materials and Manufacturing Procedures
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Topics: Engines, Manufacturing, Microturbines, Testing, Turbomachinery, Design, Engine efficiency, Engineering prototypes, Failure, Hardware
Proceedings Papers

Accelerated Structural Assessment for Risk Reduction of an AM Cruciform Rotor

Onome Scott-Emuakpor, Justin Warner, Dino Celli, Tommy George
Proc. ASME. GT2023, Volume 8: Industrial and Cogeneration; Manufacturing Materials and Metallurgy, V008T17A005, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-101581
https://doi.org/10.1115/GT2023-101581
View Paper titled, Accelerated Structural Assessment for Risk Reduction of an AM Cruciform Rotor
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Topics: Additive manufacturing, Risk reduction, Rotors
Proceedings Papers

Investigating the Cause and Threat of Lack of Fusion in 316L Parts

Onome Scott-Emuakpor, Justin Warner, Dino Celi, Tommy George
Proc. ASME. GT2023, Volume 8: Industrial and Cogeneration; Manufacturing Materials and Metallurgy, V008T17A006, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-101582
https://doi.org/10.1115/GT2023-101582
View Paper titled, Investigating the Cause and Threat of Lack of Fusion in 316L Parts
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Topics: Additive manufacturing, Excitation, Fractography, Gas turbines, Geometry, Lasers, Risk, Root cause analysis, Rotors, Spin (Aerodynamics)
Proceedings Papers

Understanding the Role of Attractive Forces in Additively Manufactured Parts With Internal Particle Dampers

Daniel Kiracofe, Daniel Diaz, Matthew Postell, Dino Celli, John Hollkamp, Lorean Napper, Onome Scott-Emuakpor, Tommy George, Jr.
Proc. ASME. GT2023, Volume 11B: Structures and Dynamics — Emerging Methods in Engineering Design, Analysis, and Additive Manufacturing; Fatigue, Fracture, and Life Prediction; Probabilistic Methods; Rotordynamics; Structural Mechanics and Vibration, V11BT23A002, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-102685
https://doi.org/10.1115/GT2023-102685
View Paper titled, Understanding the Role of Attractive Forces in Additively Manufactured Parts With Internal Particle Dampers
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Topics: Additive manufacturing, Dampers, Particulate matter, Excitation, Damping, Modeling, Weight (Mass), Aerospace industry, Design, Distributed power generation
Proceedings Papers

Damping and Fatigue Performance of Additive Manufactured Particle Damper Infused Instrumentation Rake

Dino A. Celli, Timothy Janczewski, Luke Sheridan, Onome Scott-Emuakpor, Justin Warner, Lucas Smith, John Hollkamp, Lorean Napper, Tommy George
Proc. ASME. GT2023, Volume 11B: Structures and Dynamics — Emerging Methods in Engineering Design, Analysis, and Additive Manufacturing; Fatigue, Fracture, and Life Prediction; Probabilistic Methods; Rotordynamics; Structural Mechanics and Vibration, V11BT23A007, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-103274
https://doi.org/10.1115/GT2023-103274
View Paper titled, Damping and Fatigue Performance of Additive Manufactured Particle Damper Infused Instrumentation Rake
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Topics: Additive manufacturing, Dampers, Damping, Fatigue, Instrumentation, Particulate matter, Excitation, Q-factor, Blades, Cavities
Proceedings Papers

Enhancing the Damping Capability of Rib-Stiffened Structures With Additive Manufacturing

Onome Scott-Emuakpor, Philip Johnson, Dino Celli, Tommy George
Proc. ASME. GT2023, Volume 11B: Structures and Dynamics — Emerging Methods in Engineering Design, Analysis, and Additive Manufacturing; Fatigue, Fracture, and Life Prediction; Probabilistic Methods; Rotordynamics; Structural Mechanics and Vibration, V11BT23A003, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-102691
https://doi.org/10.1115/GT2023-102691
View Paper titled, Enhancing the Damping Capability of Rib-Stiffened Structures With Additive Manufacturing
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Topics: Additive manufacturing, Damping, Gas turbines
Journal Articles

Investigation of Self-Heating During Ultrasonic Fatigue Testing and Effect on Very High Cycle Fatigue Behavior of Titanium 6Al-4V

Dino A. Celli, Onome Scott-Emuakpor, Justin Warner, Tommy George
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. March 2023, 145(3): 031016.
Paper No: GTP-22-1476
https://doi.org/10.1115/1.4055726
Published Online: December 5, 2022
View Article titled, Investigation of Self-Heating During Ultrasonic Fatigue Testing and Effect on Very High Cycle Fatigue Behavior of Titanium 6Al-4V
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Topics: Cycles, Design, Fatigue, Fatigue testing, Heating, High cycle fatigue, Stress, Titanium, Failure, Fatigue strength
Journal Articles

Analyses of Damping Sustainability of Additively Manufactured Nickel Alloy Components Subjected to High Strain Loading Cycles

John P. Hollkamp, Onome Scott-Emuakpor, Dino Celli
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. March 2023, 145(3): 031011.
Paper No: GTP-22-1462
https://doi.org/10.1115/1.4055579
Published Online: December 5, 2022
View Article titled, Analyses of Damping Sustainability of Additively Manufactured Nickel Alloy Components Subjected to High Strain Loading Cycles
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Topics: Damping, Particulate matter, Sustainability, Lasers, Additive manufacturing, Dampers
Journal Articles

Fused Deposition Modeling Fabrication Evaluation of a Ti-6Al-4V Centrifugal Compressor

Justin Warner, Dino Celli, Onome Scott-Emuakpor, Tommy George, Trevor Tomlin
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. March 2023, 145(3): 031008.
Paper No: GTP-22-1456
https://doi.org/10.1115/1.4055582
Published Online: December 5, 2022
View Article titled, Fused Deposition Modeling Fabrication Evaluation of a Ti-6Al-4V Centrifugal Compressor
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Topics: Compressors, Manufacturing, Modeling, Titanium alloys, Printing, Metals, Computerized tomography, Microscopes, Temperature, Particulate matter
Journal Articles

Refinement of a High Cycle Fatigue Decision-Gate Assessment for Additively Repaired Blades

Onome Scott-Emuakpor, Brian Runyon, Daniel Gillaugh, Lucas Smith, Phil Johnson
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. December 2022, 144(12): 121025.
Paper No: GTP-22-1320
https://doi.org/10.1115/1.4056014
Published Online: November 23, 2022
View Article titled, Refinement of a High Cycle Fatigue Decision-Gate Assessment for Additively Repaired Blades
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Topics: Blades, High cycle fatigue, Maintenance, Lasers, Stress, Fatigue, Acceptance criteria, Cycles
Proceedings Papers

Refinement of a High Cycle Fatigue Decision-Gate Assessment for Additively Repaired Blades

Onome Scott-Emuakpor, Brian Runyon, Daniel Gillaugh, Lucas Smith, Philip Johnson
Proc. ASME. GT2022, Volume 7: Industrial and Cogeneration; Manufacturing Materials and Metallurgy; Microturbines, Turbochargers, and Small Turbomachines; Oil & Gas Applications, V007T17A024, June 13–17, 2022
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-83282
https://doi.org/10.1115/GT2022-83282
View Paper titled, Refinement of a High Cycle Fatigue Decision-Gate Assessment for Additively Repaired Blades
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Topics: Blades, Gas turbines, Gates (Closures), High cycle fatigue, Maintenance, Nondestructive evaluation, Titanium, Acceptance criteria, Lasers, Additive manufacturing
Proceedings Papers

Fused Deposition Modeling Fabrication Evaluation of a Ti-6Al-4V Centrifugal Compressor

Justin Warner, Dino Celli, Onome Scott-Emuakpor, Tommy George, Trevor Tomlin
Proc. ASME. GT2022, Volume 7: Industrial and Cogeneration; Manufacturing Materials and Metallurgy; Microturbines, Turbochargers, and Small Turbomachines; Oil & Gas Applications, V007T17A025, June 13–17, 2022
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-83321
https://doi.org/10.1115/GT2022-83321
View Paper titled, Fused Deposition Modeling Fabrication Evaluation of a Ti-6Al-4V Centrifugal Compressor
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Topics: Compressors, Manufacturing, Modeling, Printing, Metals, Polymers, Steel, Aluminum, Shrinkage (Materials), Blades
Proceedings Papers

Analyses of Damping Sustainability of Additively Manufactured Nickel Alloy Components Subjected to High Strain Loading Cycles

John P. Hollkamp, Onome Scott-Emuakpor, Dino Celli
Proc. ASME. GT2022, Volume 8A: Structures and Dynamics — Aerodynamics Excitation and Damping; Bearing and Seal Dynamics; Emerging Methods in Engineering Design, Analysis, and Additive Manufacturing; Fatigue, Fracture, and Life Prediction, V08AT23A003, June 13–17, 2022
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-81207
https://doi.org/10.1115/GT2022-81207
View Paper titled, Analyses of Damping Sustainability of Additively Manufactured Nickel Alloy Components Subjected to High Strain Loading Cycles
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Topics: Additive manufacturing, Cycles, Damping, Nickel alloys, Particulate matter, Sustainability
Proceedings Papers

Investigation of Self-Heating During Ultrasonic Fatigue Testing and Effect on Very High Cycle Fatigue Behavior of Titanium 6Al-4V

Dino A. Celli, Justin Warner, Onome Scott-Emuakpor, Tommy George
Proc. ASME. GT2022, Volume 8A: Structures and Dynamics — Aerodynamics Excitation and Damping; Bearing and Seal Dynamics; Emerging Methods in Engineering Design, Analysis, and Additive Manufacturing; Fatigue, Fracture, and Life Prediction, V08AT24A010, June 13–17, 2022
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-83443
https://doi.org/10.1115/GT2022-83443
View Paper titled, Investigation of Self-Heating During Ultrasonic Fatigue Testing and Effect on Very High Cycle Fatigue Behavior of Titanium 6Al-4V
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Topics: Fatigue testing, Heating, High cycle fatigue, Titanium, Cycles, Fatigue, Fatigue life, Heat, Gas turbines, Cooling
Journal Articles

Establishing an Acceptance Criteria for Assessing Fatigue of Additive Repair Processes

Onome Scott-Emuakpor, Luke Sheridan, Joseph Beck, Brian Runyon, Tommy George
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. December 2021, 143(12): 121007.
Paper No: GTP-21-1344
https://doi.org/10.1115/1.4052061
Published Online: October 4, 2021
View Article titled, Establishing an Acceptance Criteria for Assessing Fatigue of Additive Repair Processes
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Topics: Acceptance criteria, Fatigue, Maintenance, Wire, Cycles, Microscopy, Stress, Fractography
Proceedings Papers

Discrete Element Method Simulations of Additively Manufactured Components With Integrated Particle Dampers

Daniel Kiracofe, Matthew Postell, Onome Scott-Emuakpor, Brian Runyon, Tommy George, Jr.
Proc. ASME. GT2021, Volume 9A: Structures and Dynamics — Aerodynamics Excitation and Damping; Bearing and Seal Dynamics; Emerging Methods in Design and Engineering, V09AT25A001, June 7–11, 2021
Publisher: American Society of Mechanical Engineers
Paper No: GT2021-58462
https://doi.org/10.1115/GT2021-58462
View Paper titled, Discrete Element Method Simulations of Additively Manufactured Components With Integrated Particle Dampers
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Topics: Additive manufacturing, Dampers, Discrete element methods, Particulate matter, Simulation, Damping, Geometry, Vibration, Cantilever beams, Collisions (Physics)
Proceedings Papers

Establishing an Acceptance Criteria for Assessing Fatigue of Additive Repair Processes

Onome Scott-Emuakpor, Luke Sheridan, Joseph Beck, Brian Runyon, Tommy George
Proc. ASME. GT2021, Volume 7: Industrial and Cogeneration; Manufacturing Materials and Metallurgy, V007T17A010, June 7–11, 2021
Publisher: American Society of Mechanical Engineers
Paper No: GT2021-59480
https://doi.org/10.1115/GT2021-59480
View Paper titled, Establishing an Acceptance Criteria for Assessing Fatigue of Additive Repair Processes
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Topics: Acceptance criteria, Additive manufacturing, Airfoils, Fatigue, Gas turbines, Maintenance, Titanium