Welding Metallurgy and Weldability (eBook, PDF)
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Welding Metallurgy and Weldability (eBook, PDF)
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Describes the weldability aspects of structural materials used in a wide variety of engineering structures, including steels, stainless steels, Ni-base alloys, and Al-base alloys Welding Metallurgy and Weldability describes weld failure mechanisms associated with either fabrication or service, and failure mechanisms related to microstructure of the weldment. Weldability issues are divided into fabrication and service related failures; early chapters address hot cracking, warm (solid-state) cracking, and cold cracking that occur during initial fabrication, or repair. Guidance on failure…mehr
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Dieser Download kann aus rechtlichen Gründen nur mit Rechnungsadresse in A, B, BG, CY, CZ, D, DK, EW, E, FIN, F, GR, HR, H, IRL, I, LT, L, LR, M, NL, PL, P, R, S, SLO, SK ausgeliefert werden.
- Produktdetails
- Verlag: John Wiley & Sons
- Seitenzahl: 432
- Erscheinungstermin: 10. November 2014
- Englisch
- ISBN-13: 9781118960325
- Artikelnr.: 41821861
- Verlag: John Wiley & Sons
- Seitenzahl: 432
- Erscheinungstermin: 10. November 2014
- Englisch
- ISBN-13: 9781118960325
- Artikelnr.: 41821861
Defects 5 1.2 Service-Related Defects 6 1.3 Defect Prevention and Control 7
References 8 2 Welding Metallurgy Principles 9 2.1 Introduction 9 2.2
Regions of a Fusion Weld 10 2.3 Fusion Zone 13 2.3.1 Solidification of
Metals 15 2.3.2 Macroscopic Aspects of Weld Solidification 24 2.3.4 Solute
Redistribution 34 2.3.5 Examples of Fusion Zone Microstructures 40 2.3.6
Transition Zone (TZ) 43 2.4 Unmixed Zone (UMZ) 45 2.5 Partially Melted Zone
(PMZ) 48 2.5.1 Penetration Mechanism 50 2.5.2 Segregation Mechanism 53
2.5.3 Examples of PMZ formation 58 2.6 Heat Affected Zone (HAZ) 60 2.6.1
Recrystallization and Grain Growth 61 2.6.2 Allotropic Phase
Transformations 63 2.6.3 Precipitation Reactions 66 2.6.4 Examples of HAZ
Microstructure 69 2.7 Solid-State Welding 70 2.7.1 Friction Stir Welding 72
2.7.2 Diffusion Welding 76 2.7.3 Explosion Welding 77 2.7.4 Ultrasonic
Welding 79 References 81 3 Hot Cracking 84 3.1 Introduction 84 3.2 Weld
Solidification Cracking 85 3.2.1 Theories of Weld Solidification Cracking
85 3.2.2 Predictions of Elemental Effects 94 3.2.3 The BTR and
Solidification Cracking Temperature Range 97 3.2.4 Factors that Influence
Weld Solidification Cracking 102 3.2.5 Identifying Weld Solidification
Cracking 112 3.2.6 Preventing Weld Solidification Cracking 116 3.3
Liquation Cracking 119 3.3.1 HAZ Liquation Cracking 119 3.3.2 weld metal
Liquation Cracking 122 3.3.3 Variables that Influence Susceptibility to
Liquation Cracking 123 3.3.4 Identifying HAZ and weld metal Liquation
Cracks 126 3.3.5 Preventing Liquation Cracking 127 References 128 4
Solid-State Cracking 130 4.1 Introduction 130 4.2 Ductility-dip Cracking
130 4.2.1 Proposed Mechanisms 133 4.2.2 Summary of Factors That Influence
DDC 139 4.2.3 Quantifying Ductility-Dip Cracking 143 4.2.4 Identifying
Ductility-Dip Cracks 145 4.2.5 Preventing DDC 147 4.3 Reheat Cracking 149
4.3.1 Reheat Cracking in Low-Alloy Steels 150 4.3.2 Reheat Cracking in
Stainless Steels 155 4.3.3 Underclad Cracking 158 4.3.4 Relaxation Cracking
160 4.3.5 Identifying Reheat Cracking 161 4.3.6 Quantifying Reheat Cracking
Susceptibility 163 4.3.7 Preventing Reheat Cracking 166 4.4 Strain-age
Cracking 168 4.4.1 Mechanism for Strain-age Cracking 171 4.4.2 Factors That
Influence SAC Susceptibility 178 4.4.3 Quantifying Susceptibility to
Strain-age Cracking 182 4.4.4 Identifying Strain-age Cracking 189 4.4.5
Preventing Strain-age Cracking 189 4.5 Lamellar Cracking 190 4.5.1
Mechanism of Lamellar Cracking 191 4.5.2 Quantifying Lamellar Cracking 195
4.5.3 Identifying Lamellar Cracking 197 4.5.4 Preventing Lamellar Cracking
198 4.6 Copper Contamination Cracking 201 4.6.1 Mechanism for Copper
Contamination Cracking 201 4.6.2 Quantifying Copper Contamination Cracking
203 4.6.3 Identifying Copper Contamination Cracking 205 4.6.4 Preventing
Copper Contamination Cracking 205 References 207 5 Hydrogen-Induced
Cracking 213 5.1 Introduction 213 5.2 Hydrogen Embrittlement Theories 214
5.2.1 Planar Pressure Theory 216 5.2.2 Surface Adsorption Theory 217 5.2.3
Decohesion Theory 217 5.2.4 Hydrogen-Enhanced Localized Plasticity Theory
218 5.2.5 Beachem's Stress Intensity Model 219 5.3 Factors That Influence
HIC 221 5.3.1 Hydrogen in Welds 221 5.3.2 Effect of Microstructure 224
5.3.3 Restraint 228 5.3.4 Temperature 230 5.4 Quantifying Susceptibility to
HIC 230 5.4.1 Jominy End Quench Method 231 5.4.2 Controlled Thermal
Severity Test 234 5.4.3 The Y-Groove (Tekken) Test 235 5.4.4 Gapped
Bead-on-Plate Test 236 5.4.5 The Implant Test 237 5.4.6 Tensile Restraint
Cracking Test 243 5.4.7 Augmented Strain Cracking Test 244 5.5 Identifying
HIC 245 5.6 Preventing HIC 247 5.6.1 CE Method 251 5.6.2 AWS Method 254
References 259 6 Corrosion 263 6.1 Introduction 263 6.2 Forms of Corrosion
264 6.2.1 General Corrosion 264 6.2.2 Galvanic Corrosion 265 6.2.3 Crevice
Corrosion 267 6.2.4 Selective Leaching 268 6.2.5 Erosion Corrosion 268
6.2.6 Pitting 268 6.2.7 Intergranular Corrosion 271 6.2.8 Stress Corrosion
Cracking 277 6.2.9 Microbiologically Induced Corrosion 280 6.3 Corrosion
Testing 282 6.3.1 Atmospheric Corrosion Tests 282 6.3.2 Immersion Tests 282
6.3.3 Electrochemical Tests 284 References 286 7 Fracture and Fatigue 288
7.1 Introduction 288 7.2 Fracture 290 7.3 Quantifying Fracture Toughness
293 7.4 Fatigue 297 7.5 Quantifying Fatigue Behavior 305 7.6 Identifying
Fatigue Cracking 306 7.6.1 Beach Marks 307 7.6.2 River Lines 307 7.6.3
Fatigue Striations 307 7.7 Avoiding Fatigue Failures 309 References 310 8
Failure Analysis 311 8.1 Introduction 311 8.2 Fractography 312 8.2.1
History of Fractography 312 8.2.2 The SEM 313 8.2.3 Fracture Modes 315
8.2.4 Fractography of Weld Failures 320 8.3 An Engineer's Guide to Failure
Analysis 333 8.3.1 Site Visit 334 8.3.2 Collect Background Information 335
8.3.3 Sample Removal and Testing Protocol 336 8.3.4 Sample Removal Cleaning
and Storage 336 8.3.5 Chemical Analysis 336 8.3.6 Macroscopic Analysis 337
8.3.7 Selection of Samples for Microscopic Analysis 338 8.3.8 Selection of
Analytical Techniques 338 8.3.9 Mechanical Testing 339 8.3.10 Simulative
Testing 339 8.3.11 Nondestructive Evaluation Techniques 340 8.3.12
Structural Integrity Assessment 340 8.3.13 Consultation with Experts 340
8.3.14 Final Reporting 340 8.3.15 Expert Testimony in Support of Litigation
341 References 342 9 Weldability Testing 343 9.1 Introduction 343 9.2 Types
of Weldability Test Techniques 344 9.3 The Varestraint Test 345 9.3.1
Technique for Quantifying Weld Solidification Cracking 346 9.3.2 Technique
for Quantifying HAZ Liquation Cracking 350 9.4 The Cast Pin Tear Test 354
9.5 The Hot Ductility Test 357 9.6 The Strain-to-Fracture Test 362 9.7
Reheat Cracking Test 363 9.8 Implant Test for HAZ Hydrogen-Induced Cracking
366 9.9 Gapped Bead-on-Plate Test for Weld Metal HIC 367 9.10 Other
Weldability Tests 370 References 371 Appendix A 372 Appendix B 374 Appendix
C 383 Appendix D 388 Index 396
Defects 5 1.2 Service-Related Defects 6 1.3 Defect Prevention and Control 7
References 8 2 Welding Metallurgy Principles 9 2.1 Introduction 9 2.2
Regions of a Fusion Weld 10 2.3 Fusion Zone 13 2.3.1 Solidification of
Metals 15 2.3.2 Macroscopic Aspects of Weld Solidification 24 2.3.4 Solute
Redistribution 34 2.3.5 Examples of Fusion Zone Microstructures 40 2.3.6
Transition Zone (TZ) 43 2.4 Unmixed Zone (UMZ) 45 2.5 Partially Melted Zone
(PMZ) 48 2.5.1 Penetration Mechanism 50 2.5.2 Segregation Mechanism 53
2.5.3 Examples of PMZ formation 58 2.6 Heat Affected Zone (HAZ) 60 2.6.1
Recrystallization and Grain Growth 61 2.6.2 Allotropic Phase
Transformations 63 2.6.3 Precipitation Reactions 66 2.6.4 Examples of HAZ
Microstructure 69 2.7 Solid-State Welding 70 2.7.1 Friction Stir Welding 72
2.7.2 Diffusion Welding 76 2.7.3 Explosion Welding 77 2.7.4 Ultrasonic
Welding 79 References 81 3 Hot Cracking 84 3.1 Introduction 84 3.2 Weld
Solidification Cracking 85 3.2.1 Theories of Weld Solidification Cracking
85 3.2.2 Predictions of Elemental Effects 94 3.2.3 The BTR and
Solidification Cracking Temperature Range 97 3.2.4 Factors that Influence
Weld Solidification Cracking 102 3.2.5 Identifying Weld Solidification
Cracking 112 3.2.6 Preventing Weld Solidification Cracking 116 3.3
Liquation Cracking 119 3.3.1 HAZ Liquation Cracking 119 3.3.2 weld metal
Liquation Cracking 122 3.3.3 Variables that Influence Susceptibility to
Liquation Cracking 123 3.3.4 Identifying HAZ and weld metal Liquation
Cracks 126 3.3.5 Preventing Liquation Cracking 127 References 128 4
Solid-State Cracking 130 4.1 Introduction 130 4.2 Ductility-dip Cracking
130 4.2.1 Proposed Mechanisms 133 4.2.2 Summary of Factors That Influence
DDC 139 4.2.3 Quantifying Ductility-Dip Cracking 143 4.2.4 Identifying
Ductility-Dip Cracks 145 4.2.5 Preventing DDC 147 4.3 Reheat Cracking 149
4.3.1 Reheat Cracking in Low-Alloy Steels 150 4.3.2 Reheat Cracking in
Stainless Steels 155 4.3.3 Underclad Cracking 158 4.3.4 Relaxation Cracking
160 4.3.5 Identifying Reheat Cracking 161 4.3.6 Quantifying Reheat Cracking
Susceptibility 163 4.3.7 Preventing Reheat Cracking 166 4.4 Strain-age
Cracking 168 4.4.1 Mechanism for Strain-age Cracking 171 4.4.2 Factors That
Influence SAC Susceptibility 178 4.4.3 Quantifying Susceptibility to
Strain-age Cracking 182 4.4.4 Identifying Strain-age Cracking 189 4.4.5
Preventing Strain-age Cracking 189 4.5 Lamellar Cracking 190 4.5.1
Mechanism of Lamellar Cracking 191 4.5.2 Quantifying Lamellar Cracking 195
4.5.3 Identifying Lamellar Cracking 197 4.5.4 Preventing Lamellar Cracking
198 4.6 Copper Contamination Cracking 201 4.6.1 Mechanism for Copper
Contamination Cracking 201 4.6.2 Quantifying Copper Contamination Cracking
203 4.6.3 Identifying Copper Contamination Cracking 205 4.6.4 Preventing
Copper Contamination Cracking 205 References 207 5 Hydrogen-Induced
Cracking 213 5.1 Introduction 213 5.2 Hydrogen Embrittlement Theories 214
5.2.1 Planar Pressure Theory 216 5.2.2 Surface Adsorption Theory 217 5.2.3
Decohesion Theory 217 5.2.4 Hydrogen-Enhanced Localized Plasticity Theory
218 5.2.5 Beachem's Stress Intensity Model 219 5.3 Factors That Influence
HIC 221 5.3.1 Hydrogen in Welds 221 5.3.2 Effect of Microstructure 224
5.3.3 Restraint 228 5.3.4 Temperature 230 5.4 Quantifying Susceptibility to
HIC 230 5.4.1 Jominy End Quench Method 231 5.4.2 Controlled Thermal
Severity Test 234 5.4.3 The Y-Groove (Tekken) Test 235 5.4.4 Gapped
Bead-on-Plate Test 236 5.4.5 The Implant Test 237 5.4.6 Tensile Restraint
Cracking Test 243 5.4.7 Augmented Strain Cracking Test 244 5.5 Identifying
HIC 245 5.6 Preventing HIC 247 5.6.1 CE Method 251 5.6.2 AWS Method 254
References 259 6 Corrosion 263 6.1 Introduction 263 6.2 Forms of Corrosion
264 6.2.1 General Corrosion 264 6.2.2 Galvanic Corrosion 265 6.2.3 Crevice
Corrosion 267 6.2.4 Selective Leaching 268 6.2.5 Erosion Corrosion 268
6.2.6 Pitting 268 6.2.7 Intergranular Corrosion 271 6.2.8 Stress Corrosion
Cracking 277 6.2.9 Microbiologically Induced Corrosion 280 6.3 Corrosion
Testing 282 6.3.1 Atmospheric Corrosion Tests 282 6.3.2 Immersion Tests 282
6.3.3 Electrochemical Tests 284 References 286 7 Fracture and Fatigue 288
7.1 Introduction 288 7.2 Fracture 290 7.3 Quantifying Fracture Toughness
293 7.4 Fatigue 297 7.5 Quantifying Fatigue Behavior 305 7.6 Identifying
Fatigue Cracking 306 7.6.1 Beach Marks 307 7.6.2 River Lines 307 7.6.3
Fatigue Striations 307 7.7 Avoiding Fatigue Failures 309 References 310 8
Failure Analysis 311 8.1 Introduction 311 8.2 Fractography 312 8.2.1
History of Fractography 312 8.2.2 The SEM 313 8.2.3 Fracture Modes 315
8.2.4 Fractography of Weld Failures 320 8.3 An Engineer's Guide to Failure
Analysis 333 8.3.1 Site Visit 334 8.3.2 Collect Background Information 335
8.3.3 Sample Removal and Testing Protocol 336 8.3.4 Sample Removal Cleaning
and Storage 336 8.3.5 Chemical Analysis 336 8.3.6 Macroscopic Analysis 337
8.3.7 Selection of Samples for Microscopic Analysis 338 8.3.8 Selection of
Analytical Techniques 338 8.3.9 Mechanical Testing 339 8.3.10 Simulative
Testing 339 8.3.11 Nondestructive Evaluation Techniques 340 8.3.12
Structural Integrity Assessment 340 8.3.13 Consultation with Experts 340
8.3.14 Final Reporting 340 8.3.15 Expert Testimony in Support of Litigation
341 References 342 9 Weldability Testing 343 9.1 Introduction 343 9.2 Types
of Weldability Test Techniques 344 9.3 The Varestraint Test 345 9.3.1
Technique for Quantifying Weld Solidification Cracking 346 9.3.2 Technique
for Quantifying HAZ Liquation Cracking 350 9.4 The Cast Pin Tear Test 354
9.5 The Hot Ductility Test 357 9.6 The Strain-to-Fracture Test 362 9.7
Reheat Cracking Test 363 9.8 Implant Test for HAZ Hydrogen-Induced Cracking
366 9.9 Gapped Bead-on-Plate Test for Weld Metal HIC 367 9.10 Other
Weldability Tests 370 References 371 Appendix A 372 Appendix B 374 Appendix
C 383 Appendix D 388 Index 396