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Fatigue Crack Propagation in Metals and Alloys: Microstructural Aspects and Modelling Concepts

ISBN: 978-3-527-31537-6
311 pages
April 2007
Fatigue Crack Propagation in Metals and Alloys: Microstructural Aspects and Modelling Concepts (3527315373) cover image
This comprehensive overview of the whole field of fatigue and fracture of metallic materials covers both the theoretical background and some of the latest experimental techniques. It provides a summary of the complex interactions between material microstructure and cracks, classifying them with respect to the overall damage process with a focus on microstructurally short cracks and dynamic embrittlement. It furthermore introduces new concepts for the numerical treatment of fatigue microcrack propagation and their implementation in fatigue-life prediction models.This comprehensive overview of the whole field of fatigue and fracture of metallic materials covers both the theoretical background and the latest experimental techniques. It provides a summary of the complex interactions between material microstructure and cracks, classifying them with respect to the overall damage process. It furthermore introduces new concepts for the numerical treatment of fatigue microcrack propagation and their implementation in fatigue-life prediction models.
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1 Introduction
2 Basic Concepts of Metal Fatigue and Fracture in the Engineering Design Process
Historical Background
Metal Fatigue, Crack Propagation, and Life Prediction -
A Brief Introduction
Basic Concepts of Technical Fracture Mechanics
3 Experimental Approaches to Fatigue
Mechanical Materials Testing
Crack-Propagation Measurements
Microstructural Analysis -
Quantitative Analysis of Grain and Phase Boundaries
Reproducibility of Experimental Studies
Systematic Failure Analysis
4 Physical Metallurgy of the Deformation Behavior of Metals and Alloys
Elastic Deformation
Plastic Deformation by Dislocation Movement
Activation of Slip Planes in Single- and Polycrystalline Materials
Cyclic Deformation of Metallic Materials
5 Initiation of Microcracks
Crack Initiation -
Definition and Significance
Microstructural Aspects of Crack Initiation
Crack Initiation by Elastic Anisotropy
Inter- and Transcrystalline Crack Initiation
Microcracks and the Existence of a Fatigue Limit
Crack Initiation in Inhomogeneous Materials -
Metallic Foams
6 Microstructural Features of Crack Propagation
The Abnormal Behavior of Microstructurally Short Cracks
Transcrystalline Crack Propagation
Significance of Crack-Closure Effects
Short- and Long Cracks: The Transition from Mode II to Mode I Crack Propagation
Intercrystalline Crack Propagation at Elevated Temperatures -
The Mechanism of Dynamic Embrittlement
7 Crack Modeling and Life-Prediction Concepts Accounting for the Material's Microstructure
Overview: Short-Fatigue-Crack Models
The Model of Navarro and de los Rios
Numerical Modeling of Short Crack Propagation by Means of the Boundary-Element Method
Modeling Concepts for the Diffusion-Controlled Intercrystalline Crack Propagation at High Temperatures
8 Implications and Potential of Microstructure-Based Material Concepts
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Ulrich Krupp is Senior Engineer at the Institute of Materials Technology of Siegen University, Germany, and responsible for the research files fatigue and high-temperature corrosion of metals and alloys. He completed his Ph.D. in mechanical engineering there, and also obtained his lecturing qualification (habilitation) in 2004. He spent one year at the Department of Materials Science and Engineering at the University of Pennsylvania, Philadelphia, USA, in 2002 as a Feodor Lynen fellow of the Alexander von Humboldt foundation. Hitherto, he has published over 110 scientific contributions in peer-reviewed scientific journals and conference proceedings. In 2005 his work was awarded by the Masing award of Deutsche Gesellschaft für Materialkunde.

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"…one of the most comprehensive technical reference books to adequately address fatigue crack initiation…" (Journal of Metals Online, February 8, 2008)
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