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Fatigue limit in metals /
Is there a fatigue limit in metals? This question is the main focus of this book. Written by a leading researcher in the field, Claude Bathias presents a thorough and authoritative examination of the coupling between plasticity, crack initiation and heat dissipation for lifetimes that exceed the bil...
| Clasificación: | Libro Electrónico |
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| Autor principal: | |
| Formato: | Electrónico eBook |
| Idioma: | Inglés |
| Publicado: |
London : Hoboken, N.J. :
ISTE ; Wiley,
2014.
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| Colección: | Focus series in materials science.
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| Temas: | |
| Acceso en línea: | Texto completo |
Tabla de Contenidos:
- Cover; Title Page; Contents; ACKNOWLEDGEMENTS; CHAPTER 1. INTRODUCTION ON VERY HIGH CYCLE FATIGUE; 1.1. Fatigue limit, endurance limit and fatigue strength; 1.2. Absence of an asymptote on the SN curve; 1.3. Initiation and propagation; 1.4. Fatigue limit or fatigue strength; 1.5. SN curves up to 109 cycles; 1.6. Deterministic prediction of the gigacycle fatigue strength; 1.7. Gigacycle fatigue of alloys without flaws; 1.8. Initiation mechanisms at 109 cycles; 1.9. Conclusion; 1.10. Bibliography; CHAPTER 2. PLASTICITY AND INITIATION IN GIGACYCLE FATIGUE.
- 2.1. Evolution of the initiation site from LCF to GCF2.2. Fish-eye growth; 2.2.1. Fracture surface analysis; 2.2.2. Plasticity in the GCF regime; 2.3. Stresses and crack tip intensity factors around spherical and cylindrical voids and inclusions; 2.3.1. Spherical cavities and inclusions; 2.3.2. Spherical inclusion; 2.3.3. Mismatched inclusion larger than the spherical cavity it occupies; 2.3.4. Cylindrical cavities and inclusions; 2.3.5. Cracking from a hemispherical surface void.
- 2.3.6. Crack tip stress intensity factors for cylindrical inclusions with misfit in both size and material properties2.4. Estimation of the fish-eye formation from the Paris-Hertzberg law; 2.4.1. ""Short crack"" number of cycles; 2.4.2. ""Long crack"" number of cycles; 2.4.3. ""Below threshold"" number of cycles; 2.5. Example of fish-eye formation in a bearing steel; 2.6. Fish-eye formation at the microscopic level; 2.6.1. Dark area observations; 2.6.2. ""Penny-shaped area"" observations; 2.6.3. Fracture surface with large radial ridges; 2.6.4. Identification of the models; 2.6.5. Conclusion.
- 2.7. Instability of microstructure in very high cycle fatigue (VHCF)2.8. Industrial practical case: damage tolerance at 109 cycles; 2.8.1. Fatigue threshold in N18; 2.8.2. Fatigue crack initiation of N18 alloy; 2.8.3. Mechanisms of the GCF of N18 alloy; 2.9. Bibliography; CHAPTER 3. HEATING DISSIPATION IN THE GIGACYCLE REGIME; 3.1. Temperature increase at 20 kHz; 3.2. Detection of fish-eye formation; 3.3. Experimental verification of Nf by thermal dissipation; 3.4. Relation between thermal energy and cyclic plastic energy.
- 3.5. Effect of metallurgical instability at the yield point in ultrasonic fatigue3.6. Gigacycle fatigue of pure metals; 3.6.1. Microplasticity in the ferrite; 3.6.2. Effect of gigacycle fatigue loading on the yield stress in Armco iron; 3.6.3. Temperature measurement on Armco iron; 3.6.4. Intrinsic thermal dissipation in Armco iron; 3.6.5. Analysis of surface fatigue crack on iron; 3.7. Conclusion; 3.8. Bibliography; INDEX.