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Fracture Initiation by Local Brittle Zones in Weldments of Quenched and Tempered Structural Alloy Steel Plate / KL. Kenney, WG. Reuter, HS. Reemsnyder, DK. Matlock

Conference Author:
Fatigue and Fracture Mechanics: 28th Volume (28th : 1996 : Saratoga Springs, New York)
Physical Description:
1 online resource (23 pages) : illustrations, figures, tables
Additional Creators:
Kenney, KL., Matlock, DK., Reemsnyder, HS., Reuter, WG., American Society for Testing and Materials, and ASTM International
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Contents:
Machine generated contents note: Slip Line Fracture Mechanics: A New Regime of Fracture Mechanics / F. A. McClintock -- Fatigue and Fracture Behavior of Moment Frame Connections Under Seismic Loading (Northridge Earthquake) / J. M. Barsom -- A Structural Integrity Procedure Arising from the SINTAP Project / A. Bannister / S. E. Webster -- Failure Beneath Cannon Thermal Barrier Coatings by Hydrogen Cracking: Mechanisms and Modeling / J. H. Underwood / G. N. Vigilante / E. Troiano -- Experiences and Modeling of Hydrogen Cracking in Thick-Walled Pressure Vessel / J. H. Underwood / G. N. Vigilante / E. Troiano -- High Cycle Fatigue Threshold in the Presence of Naturally Initiated Small Surface Cracks / M. A. Moshier / Theodore Nicholas / Ben Hillberry -- Effects of Thermomechanical Fatigue Loading on Damage Evolution and Lifetime of a Coated Super Alloy / C. Sick / K. Mull / M. Bartsch -- A Hybrid Approach for Subsurface Crack Analysis in Railway Wheels Under Rolling Contact Loads / M. Guagliano / M. Sangirardi / L. Vergani -- Cell Model Predictions of Ductile Fracture in Damaged Pipelines / C. Ruggieri / E. Hippert -- Multiaxial Fatigue Analysis of Interference Fit Aluminum A1 2024-T3 Specimens / G. Shatil / A. G. Page -- Applications of Scaling Models and the Weibull Stress to the Determination of Structural Performance-Based Material Screening Criteria / J. Mercier / S. M. Graham -- Plane Stress Mixed Mode Crack-Tip Stress Fields Characterized by a Triaxial Stress Parameter and a Plastic Deformation Extent Based Characteristic Length / M. A. Sutton / F. Ma / X. Deng -- Constraint Effect on 3D Crack-Front Stress Fields in Elastic-Plastic Thin Plates / X. K. Zhu / Y. Kim / Y. J. Chao / P. S. Lam -- Analysis of Brittle Fracture in Surface-Cracked Plates Using Constraint-Corrected Stress Fields / W. G. Reuter / J. C. Newman / Y. Y. Wang -- Application of a T-Stress Based Constraint Corrections to A533B Steel Fracture Toughness Data / R. L. Tregoning / J. A. Joyce -- The Effect of Localized Plasticity and Crack Tip Constraint in Undermatched Welds / G. Mercier -- Modeling of Cleavage Fracture in Connections of Welded Steel Moment Resistant Frames / R. H. Dodds, Jr. / C. G. Matos -- The Importance of Material Fabrication History on Weld Fracture and Durability / F. W. Brust -- Creep Crack Growth in the Base Metal and a Weld Joint of X20CrMoV 12 1 Steel Under Two-Step Loading / N. W. Lee / K. S. Kim / Y. K. Chung -- Analytical & Experimental Study of Fracture in Bend Specimens Subjected to Local Compression / T. L. Panontin / Wade A. Meith / M. R. Hill -- Application of Uncertainty Methodologies to Measured Fatigue Crack Growth Rates and Stress Intensity Factor Ranges / W. G. Steele / S. R. Daniewicz / R. S. Blandford -- Load Interaction Effects on Small Crack Growth Behavior in PH 13-8 Mo Stainless Steel / O. Jin / W. S. Johnson -- Mean Stress Effects on the High Cycle Fatigue Limit Stress in Ti-6A1-4V / T. Nicholas / D. C. Maxwell -- Experiments and Analysis of Mean Stress Effects on Fatigue for SAE1045 Steels / C. Chu / R. A. Chernenkoff / J. J. Bonnen -- Fatigue Crack Growth Mechanisms in Alumina at High Temperature / A. S. Kobayashi / K. W. White / M. T. Kokaly -- Frequency Effects of Fatigue Behavior and Temperature Evolution of Steels / H. Tian / L. K. Mansur / J. P. Strizak / P. K. Liaw / L. Jiang / B. Yang / H. Wang / D. Fielden / J. Huang / R. Kuo / J. Huang -- Effect of Transient Loads on Fatigue Crack Growth in Mill Annealed Ti-62222 at -54, 25, and 175[degrees]C / R. I. Stephens / D. A. Schoenefeld / R. R. Stephens -- Propagation of Non-Planar Fatigue Cracks: Experimental Observations and Numerical Simulations / A. R. Ingraffea / P. A. Wawrzynek / W. T. Riddell -- Corrosion Fatigue Behavior of 17-4 PH Stainless Steel in Different Tempers / C.-P. Lin / C.-K. Lin -- Plasticity and Roughness Closure Interactions Near the Fatigue Crack Growth Threshold / R. S. Piascik / J. A. Newman -- An Extension of Uniaxial Crack-Closure Analysis to Multiaxial Fatigue / C. Chu / J. J. Bonnen -- Dynamic Fracture Toughness Measurements in the Ductile-to-Brittle Region Using Small Specimens / R. E. Link -- A Model for Predicting Fracture Toughness of Steels in the Transition Region from Hardness / M. Wagenhofer / M. E. Natishan -- Results from the MPC Cooperative Test Program on the Use of Precracked Charpy Specimens for T[subscript 0] Determination / W. A. Van Der Sluys / B. Young / J. G. Merkle -- Simulation of Grain Boundary Decohesion and Crack Initiation in Aluminum Microstructure Models / E. Iesulauro / A. R. Ingraffea / P. A. Wawrzynek / S. Arwade -- A Physics-Based Model for the Crack Arrest Toughness of Ferritic Steels / M. E. Natishan / M. Wagenhofer / M. T. Kirk -- An Analytical Method for Studying Cracks with Multiple Kinks / S. L. Phoenix / S. Termaath -- An Innovative Technique for Measuring Fracture Toughness of Metallic and Ceramic Materials / K. C. Liu / D. E. McCabe / J. Wang.
Summary:
The heat-affected zone (HAZ) embrittlement of an API 2Y Grade 50T quenched and tempered offshore structural steel plate, welded by the submerged-arc process at a heat input of 4.5 kJ/mm, was investigated from the viewpoint of identifying the local brittle zone (LBZ) microstructure and the metallurgical factors associated with its formation. Microstructural and fractographic analysis showed the LBZ microstructure to be dual phase martensite-austenite (M-A) constituent. The formation of M-A constituent was found to be related to microstructural banding of the hot-rolled base plate. When the banded base plate was welded, M-A constituent formed only within the band microstructure which penetrated the intercritically-reheated coarse-grain HAZ (IRCGHAZ). The chemistry of the band microstructure in conjunction with the thermal cycle of the IRCGHAZ provided the critical conditions for the formation of M-A constituent in the API 2Y Grade 50T steel investigated. The influence of local brittle zones (i.e., M-A constituent) on the HAZ fracture toughness was evaluated by means of Crack-Tip Opening Displacement (CTOD) tests. These tests showed the steel to suffer embrittlement when the fatigue precrack sampled an intercritically-reheated coarse-grain HAZ which contained M-A constituent, confirming that M-A constituent is the major microstructural factor controlling the HAZ toughness of this particular steel.
Dates of Publication and/or Sequential Designation:
Volume 1997, Issue 1321 (January 1997)
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ISBN:
0803124104
9780803124103
9780803153745 (e-ISBN)
Digital File Characteristics:
text file PDF
Bibliography Note:
Includes bibliographical references 12.
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Reproduction Note:
Electronic reproduction. W. Conshohocken, Pa. : ASTM International, 1997. Mode of access: World Wide Web. System requirements: Web browser. Access may be restricted to users at subscribing institutions.
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Mode of access: World Wide Web.
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