NDLI: DISFRAC Testing and Results

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Hot Isostatic Pressing of a Varying Thickness, Thick-Walled Vessel (Reactor Circulating Pump Bowl) for a Pressurised Water Reactor (PWR) Application

Effect of Pre-Strain on Mechanical Properties of Pressure Vessel Steel Grades: Assessment of Stress Relieving / Post Weld Heat Treatments Efficiency at Regenerating Properties

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Micromechanisms of Hydrogen-Assisted Cracking in Super Duplex Stainless Steel Investigated by Scanning Probe Microscopy

Characteristics of Fatigue Crack Growth and Stress Corrosion Cracking in Aggressive Environments of Aluminum Alloys for Hydrogen Gas Containers

Effect of Indentation Load on Vickers Hardness of Austenitic Stainless Steel After Hydrogen Charging

Crack Initiation and Propagation Under Hydrogen-Enhanced Fatigue of a Cr-Mo Steel for Gaseous Hydrogen Storage

Development of Pressure Vessels Made of 9Cr-1Mo-V Steels for High-Temperature Processes in Refining Industries

Hydrogen Assisted Fatigue Crack Growth in a Precipitation-Hardened Martensitic Stainless Steel Under Gaseous Hydrogen

Tensile- and Fatigue-Properties of Low Alloy Steel JIS-SCM435 and Carbon Steel JIS-SM490B in 115 MPA Hydrogen Gas

Fracture Toughness After Long-Term Aging in 9Cr-1Mo-V Steel for Pressure Vessels

The Quantitative Estimation of the Sensitivity of Corrosion and Hydrogen Environment on Fatigue Crack Growth Rate for Steels

The Analysis of Hydrogen Diffusion Behaviors Coupled With the Analysis of Heat Transfer Around the Heat Affected Zone of Welding

Fatigue-Life and Leak-Before-Break Assessments of Cr-Mo Steel Pressure Vessels With High-Pressure Gaseous Hydrogen

SSRT and Fatigue Crack Growth Properties of High-Strength Austenitic Stainless Steels in High-Pressure Hydrogen Gas

Material Selection and Safety Validation of Steel Tanks for Hydrogen Stations

Hydrogen-Assisted Subcritical Crack Growth Rate in Cr-Mo Steels

Comparison of Stainless Steels for High-Pressure Hydrogen Service

Measurement of Fracture Properties for Ferritic Steel in High-Pressure Hydrogen Gas

Fabrication and Testing of Electron Beam Welded Alloy AA2219 Aluminum Pressure Vessels for High-Pressure Hydrogen Service

Summary of an ASME/DOT Project on Measurements of Fatigue Crack Growth Rate of Pipeline Steels

Development of an Engineering-Based Hydrogen-Assisted Fatigue Crack Growth Design Methodology for Code Implementation

Prediction on Initiation of Hydrogen-Induced Delayed Cracking in High-Strength Steel Based on Cohesive Zone Modeling

Definition of a Charpy V-Notched Mastercurve to Fit Transition of Ferritic Steels

A Weibull Stress Approach Incorporating the Coupling Effect of Constraint and Plastic Strain in Cleavage Fracture Toughness Predictions

Mechanical Properties Estimation of Materials With Different Grain Sizes by Small Punch Test at Elevated Temperature

An Engineering Procedure for Calculating Cleavage Fracture Toughness From Charpy Specimen Data Using a Mechanistic Approach for Ferritic Steels

Three-Dimensional Finite Element Simulations of Elastic and Elastic-Plastic Crack Growth Using Automated Re-Meshing Techniques

DISFRAC Testing and Results

A Comparison of Notch Failure Assessment Diagram Methods for Assessing the Fracture Resistance of Structures Containing Non-Sharp Defects

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Three-Dimensional Fracture Mechanics Analyses of Single-Edge Cracked Plate Specimens

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Probabilistic Fracture Analysis of Circumferentially Cracked Pipes

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The Effects of Maintenance Actions on the PFDavg of Spring Operated Pressure Relief Valves

Weld Residual Stress Inputs for a Probabilistic Fracture Mechanics Code

Modeling of Tensile Residual Stresses Extending More Than 5 Weld Widths From Weld Joint

Understanding Welding Cost: Using Flux-Cored Arc Welding (FCAW) for Cost Reduction and Productivity Improvement

3D Simulation of a Peripheral Adapter J-Groove Attachment Weld in a Vessel Head

Finite Element Modelling of Welded Austenitic Stainless Steel Plate With 8-Passes

Fast Simulation for Multi-Pass Welding Process Using Iterative Substructure Method: Investigation of Optimization and Efficient Computation

Measurement of Residual Stress in Reactor Nozzle Mock-Ups Containing Dissimilar Metal Welds

Assessment of Residual Stress Profiles for Fitness for Service Assessment of Pipe Girth Welds

Welding Distortion Can be Mitigated if Welding Current and Traveling Speed Vary Optimized Along a Weld Path

Residual Stress Profiles of Pipe Girth Weld Using a Stress Decomposition Method

Biaxial Residual Stress Mapping for a Dissimilar Metal Welded Nozzle

Residual Stresses in Friction Stir Welded Tube-Tubesheet Joint

Residual Stress Investigation in a Stainless Steel Ring Welded Circular Disc by Over-Coring Deep Hole Drilling Simulation and Measurement

Probeless Tool Aided Friction Stir Welding as a Fabrication Technique for Tungsten Embedded Mechanical Composite of Copper

Effect of In Plane and Out of Plane Bending on Weld Residual Stresses

Characterization and Modelling of Tensile Flow Behavior of Ni Base Alloy 690 at Various Temperatures and Strain Rates

Evaluation of Residual Stresses in Small Diameter Stainless Steel Pipe Welds by Two-Dimensional and Three-Dimensional Finite Element Analyses

A Parametric Study of Rm/T and Weld Repair Effects on Through-Wall Axial and Hoop WRS Distributions in BWR Nozzle Dissimilar Metal Welds

Validation Approaches for Weld Residual Stress Simulation

Development of Residual Stress Profiles for Defect Tolerance Assessments of Thick Section Electron Beam Welds

Simplified Dissimilar Metal Weld Through-Wall Weld Residual Stress Models for Single V Groove Welds in Cylindrical Components

Measurement of Plastic Strain Distribution in Dissimilar Metal Weld by Micro-Hardness Mapping

High Temperature Dynamics Strain Hardening Behavior in Stainless Steels and Nickel Alloys

Residual Stresses in Alloy 182 PWHT Buttering and Attachment Weld: Validation by Modeling and Measurements of a Full Scale Mockup

On the Thermo-Mechanical Behaviour of SA508 Grade 4 Ferritic Steel

Modelling and Measuring Residual Stresses in Pipe Girth Welds: Lessons From the Style Framework 7 Project

Overview of Welding Research Under the New Nuclear Manufacturing (NNUMAN) Programme

Residual Stress Evaluation of Small Diameter Stainless Steel Piping by Experimental Measurements and Finite Element Analysis

Development of Simplified Empirical Phase Transformation Model for Use in Welding Residual Stress Simulations

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DISFRAC Testing and Results

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Erickson, Marjorie Kristine, B. Cochran
Copyright Year	2014
Abstract	A theoretical, multi-scale model to predict the fracture toughness of ferritic steels in the ductile-to-brittle fracture mode transition temperature region has been implemented into the DISlocation-based FRACture (DISFRAC) computer code to permit fracture safety assessments of ferritic structures. The theoretical basis of this model provides a means of predicting fracture behavior outside of the ranges of data currently used in deriving empirically-based models and should provide a means of improving the understanding of fracture behavior in the fracture mode transition region. Testing has been conducted to verify the model behavior as coded into DISFRAC_V2 and to validate the code predictions against trends observed in mechanical test data. Sensitivity studies were also conducted to identify the models and parameters having the greatest effect on the predicted results. The DISFRAC model was found to be most sensitive to the definition of a “specimen size” relative to the number of particles considered. Specimen size had a large effect, both on the temperature-dependence observed across the range of predicted fracture toughness as well as on the range of KJc values simulated at each test temperature. This sensitivity of KJc to specimen size needs more study to ensure definition of an appropriate specimen size based strongly on the particles most relevant to the fracture process.
Sponsorship	Pressure Vessels and Piping Division
File Format	PDF
ISBN	9780791846049
DOI	10.1115/PVP2014-28543
Volume Number	Volume 6B: Materials and Fabrication
Conference Proceedings	ASME 2014 Pressure Vessels and Piping Conference
Language	English
Publisher Date	2014-07-20
Publisher Place	Anaheim, California, USA
Access Restriction	Subscribed
Subject Keyword	Computers Temperature Fracture (materials) Brittleness Steel Fracture toughness Fracture (process) Phase transition temperature Temperature effects Particulate matter Mechanical testing Safety Testing
Content Type	Text
Resource Type	Article

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