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Proceedings Papers

Assessment of Flaws in Non-Stress Relieved Carbon Steel Welds Caused by Hydrogen Attack

K. E. Bagnoli, Z. A. Cater-Cyker, C. A. Hay, R. L. Holloman, Y. Hioe, G. Wilkowski, B. C. Rollins, K. M. Nikbin
Proc. ASME. PVP2021, Volume 4: Materials and Fabrication, V004T06A033, July 13–15, 2021
Paper No: PVP2021-61603
https://doi.org/10.1115/PVP2021-61603
View Paper titled, Assessment of Flaws in Non-Stress Relieved Carbon Steel Welds Caused by Hydrogen Attack
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Topics: Carbon steel, Hydrogen, Stress, Welded joints, Fracture (Materials), Damage, Steel, Creep, High temperature, Inspection
Proceedings Papers

Volumetric Damage Modeling of High Temperature Hydrogen Attack in Steel Using a Continuum Damage Mechanics Approach

K. E. Bagnoli, Z. A. Cater-Cyker, R. L. Holloman, C. A. Hay, S. Chavoshi, K. M. Nikbin, L. T. Hill
Proc. ASME. PVP2020, Volume 3: Design and Analysis, V003T03A051, August 3, 2020
Paper No: PVP2020-21279
https://doi.org/10.1115/PVP2020-21279
View Paper titled, Volumetric Damage Modeling of High Temperature Hydrogen Attack in Steel Using a Continuum Damage Mechanics Approach
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Topics: Damage, Damage mechanics, Fitness-for-service, High temperature, Hydrogen, Modeling, Steel
Proceedings Papers

Fracture Toughness of Defects Orientated Parallel to a Dissimilar Metal Weld Boundary

A. N. O’Connor, C. M. Davies, K. M. Nikbin
Proc. ASME. PVP2018, Volume 6A: Materials and Fabrication, V06AT06A015, July 15–20, 2018
Paper No: PVP2018-84405
https://doi.org/10.1115/PVP2018-84405
View Paper titled, Fracture Toughness of Defects Orientated Parallel to a Dissimilar Metal Weld Boundary
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Topics: Fracture toughness, Metals, Cladding systems (Building), Finite element analysis, Fracture (Materials), Stress, Composite materials, Corrosion resistance, Corrosion resistant materials, Crack propagation
Proceedings Papers

Experimental Determination of Elastic and Plastic LLD Rates During Creep Crack Growth Testing

K. M. Tarnowski, C. M. Davies, K. M. Nikbin, D. W. Dean
Proc. ASME. PVP2017, Volume 6A: Materials and Fabrication, V06AT06A066, July 16–20, 2017
Paper No: PVP2017-65685
https://doi.org/10.1115/PVP2017-65685
View Paper titled, Experimental Determination of Elastic and Plastic LLD Rates During Creep Crack Growth Testing
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Topics: Creep, Fracture (Materials), Testing, Stress, ASTM International, Displacement, Failure, Finite element analysis
Proceedings Papers

Creep Crack Growth Testing Under Secondary and Combined Loading

P. Kapadia, C. M. Davies, D. W. Dean, K. M. Nikbin
Proc. ASME. PVP2015, Volume 6A: Materials and Fabrication, V06AT06A042, July 19–23, 2015
Paper No: PVP2015-45222
https://doi.org/10.1115/PVP2015-45222
View Paper titled, Creep Crack Growth Testing Under Secondary and Combined Loading
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Topics: Creep, Fracture (Materials), Testing, Wedges, Ductility, Residual stresses, Electron beam welding, Fracture mechanics, Plasticity, Stainless steel
Proceedings Papers

The Influence of Creep Strain on Crack Length Measurements Using the Potential Drop

K. M. Tarnowski, C. M. Davies, K. M. Nikbin, D. W. Dean
Proc. ASME. PVP2015, Volume 6A: Materials and Fabrication, V06AT06A044, July 19–23, 2015
Paper No: PVP2015-45297
https://doi.org/10.1115/PVP2015-45297
View Paper titled, The Influence of Creep Strain on Crack Length Measurements Using the Potential Drop
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Topics: Creep, Fracture (Materials), Finite element model, Testing, Electric potential, Finite element analysis, Materials properties, Stainless steel, Stress
Proceedings Papers

Creep Crack Growth Predictions in 316H Steel Over a Wide Range of Stresses and Temperatures

A. Mehmanparast, C. M. Davies, K. M. Nikbin, G. A. Webster
Proc. ASME. PVP2014, Volume 6A: Materials and Fabrication, V06AT06A041, July 20–24, 2014
Paper No: PVP2014-28709
https://doi.org/10.1115/PVP2014-28709
View Paper titled, Creep Crack Growth Predictions in 316H Steel Over a Wide Range of Stresses and Temperatures
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Topics: Creep, Fracture (Materials), Steel, Stress, Temperature, Damage, Ductility, Engineering simulation, Finite element analysis, Power stations
Proceedings Papers

The Weld Depth and Angle Acuity Effects on the Crack Growth Behaviour of P91 Feature Test Specimens

M. Yatomi, A. Mehmanparast, S. Maleki, K. M. Nikbin
Proc. ASME. PVP2014, Volume 6A: Materials and Fabrication, V06AT06A035, July 20–24, 2014
Paper No: PVP2014-28507
https://doi.org/10.1115/PVP2014-28507
View Paper titled, The Weld Depth and Angle Acuity Effects on the Crack Growth Behaviour of P91 Feature Test Specimens
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Topics: Fracture (Materials), Cracking (Materials), Fracture (Process), Welded joints, Creep, Damage, Dimensions, Electrical discharge machining, Rupture, Steel
Proceedings Papers

Specimen Geometry and Size Effects on the Creep Crack Growth Behaviour of P91 Weldments

A. Mehmanparast, S. Maleki, M. Yatomi, K. M. Nikbin
Proc. ASME. PVP2013, Volume 6A: Materials and Fabrication, V06AT06A030, July 14–18, 2013
Paper No: PVP2013-97417
https://doi.org/10.1115/PVP2013-97417
View Paper titled, Specimen Geometry and Size Effects on the Creep Crack Growth Behaviour of P91 Weldments
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Topics: Creep, Fracture (Materials), Geometry, Fracture mechanics, Heat, Temperature, Tension
Proceedings Papers

Creep Crack Growth Prediction of Very Long Term P91 Steel Using Extrapolated Short-Term Uniaxial Creep Data

S. Maleki, A. Mehmanparast, K. M. Nikbin
Proc. ASME. PVP2013, Volume 6A: Materials and Fabrication, V06AT06A033, July 14–18, 2013
Paper No: PVP2013-97506
https://doi.org/10.1115/PVP2013-97506
View Paper titled, Creep Crack Growth Prediction of Very Long Term P91 Steel Using Extrapolated Short-Term Uniaxial Creep Data
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Topics: Creep, Fracture (Materials), Steel, Failure, High temperature, Crack propagation, Databases, Ductility, Fitness-for-service, Remaining life assessment
Proceedings Papers

Simulating Residual Stresses Using a Modified Wedge-Loaded Compact Tension Specimen

P. Kapadia, H. Zhou, C. M. Davies, R. C. Wimpory, K. M. Nikbin
Proc. ASME. PVP2013, Volume 6A: Materials and Fabrication, V06AT06A041, July 14–18, 2013
Paper No: PVP2013-97942
https://doi.org/10.1115/PVP2013-97942
View Paper titled, Simulating Residual Stresses Using a Modified Wedge-Loaded Compact Tension Specimen
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Topics: Residual stresses, Tension, Wedges, Fracture (Materials), Creep, Plasticity, Computer simulation, Ductility, Fracture (Process), Stainless steel
Proceedings Papers

The Influence of Inelastic Damage on Tensile Deformation and Creep Crack Growth Behaviour of Type 316H Stainless Steel

A. Mehmanparast, C. M. Davies, D. W. Dean, K. M. Nikbin
Proc. ASME. PVP2013, Volume 6A: Materials and Fabrication, V06AT06A044, July 14–18, 2013
Paper No: PVP2013-98001
https://doi.org/10.1115/PVP2013-98001
View Paper titled, The Influence of Inelastic Damage on Tensile Deformation and Creep Crack Growth Behaviour of Type 316H Stainless Steel
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Topics: Creep, Damage, Fracture (Materials), Stainless steel, Tensile deformation, Temperature, Compression, Deformation, Tension
Proceedings Papers

Numerical Simulation of Residual Stresses Induced in Compact Tension Specimens Using Electron Beam Welding

P. Kapadia, C. M. Davies, D. W. Dean, K. M. Nikbin
Proc. ASME. PVP2012, Volume 6: Materials and Fabrication, Parts A and B, 1115-1124, July 15–19, 2012
Paper No: PVP2012-78364
https://doi.org/10.1115/PVP2012-78364
View Paper titled, Numerical Simulation of Residual Stresses Induced in Compact Tension Specimens Using Electron Beam Welding
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Topics: Computer simulation, Electron beam welding, Residual stresses, Tension, Welding, Fracture (Materials), Stress, Creep, Plasticity, Cathode ray oscilloscopes
Proceedings Papers

Specimen Orientation and Constraint Effects on the Creep Crack Growth Behaviour of 316H Stainless Steel

A. Mehmanparast, C. M. Davies, D. W. Dean, K. M. Nikbin
Proc. ASME. PVP2012, Volume 6: Materials and Fabrication, Parts A and B, 259-269, July 15–19, 2012
Paper No: PVP2012-78096
https://doi.org/10.1115/PVP2012-78096
View Paper titled, Specimen Orientation and Constraint Effects on the Creep Crack Growth Behaviour of 316H Stainless Steel
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Topics: Creep, Fracture (Materials), Stainless steel, Steel, Temperature, Compression, Rupture, Tension
Proceedings Papers

Predictions of Creep Crack Initiation Periods

C. M. Davies, G. A. Webster, K. M. Nikbin
Proc. ASME. PVP2010, ASME 2010 Pressure Vessels and Piping Conference: Volume 6, Parts A and B, 313-322, July 18–22, 2010
Paper No: PVP2010-25035
https://doi.org/10.1115/PVP2010-25035
View Paper titled, Predictions of Creep Crack Initiation Periods
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Topics: Creep, Fracture (Materials), Displacement, Electric power generation, Fracture mechanics, High temperature, Steel
Proceedings Papers

Validation of the K and J Parameters in a Compact Tension Specimen Containing Intergranular and Straight Crack Paths

A. N. Mehmanparast, C. M. Davies, K. M. Nikbin
Proc. ASME. PVP2010, ASME 2010 Pressure Vessels and Piping Conference: Volume 5, 355-366, July 18–22, 2010
Paper No: PVP2010-25281
https://doi.org/10.1115/PVP2010-25281
View Paper titled, Validation of the K and J Parameters in a Compact Tension Specimen Containing Intergranular and Straight Crack Paths
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Topics: Fracture (Materials), Tension, Stress, Finite element analysis, Grain boundaries, Damage, Displacement measurement, Engineering simulation, Fracture mechanics, Geometry
Proceedings Papers

Compressive Pre-Strain Effects on the Creep and Crack Growth Behaviour of 316H Stainless Steel

C. M. Davies, David W. Dean, A. N. Mehmanparast, K. M. Nikbin
Proc. ASME. PVP2010, ASME 2010 Pressure Vessels and Piping Conference: Volume 6, Parts A and B, 323-330, July 18–22, 2010
Paper No: PVP2010-25044
https://doi.org/10.1115/PVP2010-25044
View Paper titled, Compressive Pre-Strain Effects on the Creep and Crack Growth Behaviour of 316H Stainless Steel
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Topics: Creep, Fracture (Materials), Stainless steel, Temperature, Compression, Ductility, Fracture mechanics, Tension, Testing
Proceedings Papers

Measurements of Residual Stresses in 316 Stainless Steel Weldments

C. M. Davies, D. Hughes, R. C. Wimpory, David W. Dean, K. M. Nikbin
Proc. ASME. PVP2010, ASME 2010 Pressure Vessels and Piping Conference: Volume 6, Parts A and B, 1265-1273, July 18–22, 2010
Paper No: PVP2010-25034
https://doi.org/10.1115/PVP2010-25034
View Paper titled, Measurements of Residual Stresses in 316 Stainless Steel Weldments
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Topics: Residual stresses, Stainless steel, Fracture (Materials), Creep, Stress, Tension, Cutting, High temperature, Metals, Neutron diffraction
Proceedings Papers

The Influence of Creep-Fatigue Interaction on High Temperature Crack Growth in 316 Steel Weldments

C. M. Davies, David W. Dean, A. N. Mehmanparast, K. M. Nikbin
Proc. ASME. PVP2009, Volume 6: Materials and Fabrication, Parts A and B, 1491-1502, July 26–30, 2009
Paper No: PVP2009-77182
https://doi.org/10.1115/PVP2009-77182
View Paper titled, The Influence of Creep-Fatigue Interaction on High Temperature Crack Growth in 316 Steel Weldments
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Topics: Creep, Fatigue, Fracture (Materials), High temperature, Steel, Stress, Brittleness, Cracking (Materials), Fracture (Process), Heat
Proceedings Papers

The Influence of Geometric and Welding Parameters on Residual Stress in Thin Welded Steel Structures

C. M. Davies, M. Be´resˇ, D. Hughes, D. Dye, K. M. Nikbin
Proc. ASME. PVP2009, Volume 6: Materials and Fabrication, Parts A and B, 327-334, July 26–30, 2009
Paper No: PVP2009-77181
https://doi.org/10.1115/PVP2009-77181
View Paper titled, The Influence of Geometric and Welding Parameters on Residual Stress in Thin Welded Steel Structures
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Topics: Steel, Stress, Welding, Stress concentration, Construction, Dimensions, Neutron diffraction, Plates (structures), Residual stresses, Ships