Micromechanism of Cleavage Fracture of Metals
A Comprehensive Microphysical Model for Cleavage Cracking in Metals
- 1st Edition - September 11, 2014
- Latest edition
- Authors: Jianhong Chen, Rui Cao
- Language: English
- Paperback ISBN:9 7 8 - 0 - 1 2 - 8 1 0 1 4 2 - 1
- Hardback ISBN:9 7 8 - 0 - 1 2 - 8 0 0 7 6 5 - 5
- eBook ISBN:9 7 8 - 0 - 1 2 - 8 0 1 0 5 1 - 8
In this book the authors focus on the description of the physical nature of cleavage fracture to offer scientists, engineers and students a comprehensive physical model which vi… Read more
In this book the authors focus on the description of the physical nature of cleavage fracture to offer scientists, engineers and students a comprehensive physical model which vividly describes the cleavage microcracking processes operating on the local (microscopic) scale ahead of a defect. The descriptions of the critical event and the criteria for cleavage fracture will instruct readers in how to control the cleavage processes and optimize microstructure to improve fracture toughness of metallic materials.
- Physical (mechanical) processes of cleavage fracture operating on the local (microscopic) scale, with the focus on the crack nucleation and crack propagation across the particle/grain and grain/grain boundaries
- Critical event, i.e., the stage of greatest difficulty in forming the microcrack, which controls the cleavage fracture
- Criteria triggering the cleavage microcracking with incorporation of the actions of macroscopic loading environment into the physical model
- Effects of microstructure on the cleavage fracture, including the effects of grain size, second phase particles and boundary
- Comprehensive description of the brittle fracture emerging in TiAl alloys and TiNi memory alloys
Materials scientists, metallurgists and engineers working in fields related to the application and manufacturing of metals
- Dedication
- Acknowledgments
- Preface
- Acknowledgments
- The Motivation that Inspired the Authors to Write this Book Resides in the Following Issues
- Notes About This Book
- Chapter 1: Introduction
- Abstract
- 1.1 Basic Concepts of Fracture
- 1.2 Basic Theories Relevant to the Micromechanism of Cleavage Fracture
- 1.3 A Review of the Micromechanism of Cleavage Fracture of Steel
- Chapter 2: Methodology
- Abstract
- 2.1 Materials
- 2.2 Global Mechanical Tests
- 2.3 Microscopic Tests and Observations
- 2.4 Finite Element Method Calculations and Simulations
- 2.5 Measurement of Critical Values of Fracture Plastic Strain εpc, Local Cleavage Fracture Stress σf, and Critical Stress Triaxiality Tc
- Chapter 3: Microphysical Processes of Cleavage Fracture of Steels
- Abstract
- 3.1 Essential Contents in the Micromechanism of Cleavage Fracture
- 3.2 A General Description of Microscopic Cracking Processes in Cleavage Fracture
- 3.3 Crack Nucleation
- 3.4 Crack Propagation
- Chapter 4: Critical Event for Cleavage Fracture
- Abstract
- 4.1 Physical Meaning of the Critical Event for Cleavage Fracture
- 4.2 Methodology to Identify the Critical Event for Cleavage Fracture
- 4.3 Critical Events for Cleavage Fracture
- 4.4 Variations in Critical Event
- Chapter 5: Criteria for Cleavage Fracture
- Abstract
- 5.1 Physical Meaning of the Criteria for Cleavage Fracture
- 5.2 Distributions of Local Stress and Local Strain Ahead of a Precrack Tip
- 5.3 Three Criteria for Triggering Cleavage Fracture in Precracked Specimens
- 5.4 Two Critical Criteria for Triggering Cleavage Fracture in Notched Specimens
- 5.5 Fracture Distance Xf
- 5.6 Local Cleavage Fracture Stress σf
- 5.7 Fracture Plastic Strain εpc
- 5.8 Critical Stress Triaxiality Tc
- 5.9 Effective Surface Energy γp
- Chapter 6: Effects of Material Microstructure on Cleavage Fracture
- Abstract
- 6.1 Effects of Grain Size
- 6.2 Effects of Boundary
- 6.3 Effects of Second-Phase Particle
- 6.4 Synthetic Effects of Grain Size and Second-Phase Particle
- 6.5 Effects of Microstructural Phases on Cleavage Fracture of HSLA Steels
- Chapter 7: Global Fracture Toughness Related to the Micromechanism of Cleavage Fracture
- Abstract
- 7.1 Physical Meaning of Parameters Characterizing the Global Fracture Toughness Viewed from the Micromechanism of Cleavage Fracture
- 7.2 The Global Fracture Mechanism and Improvement of the Fracture Toughness of HSLA Steels
- 7.3 Relationships Between the Scatter of Global Toughness and the Scatter of Critical Values of Microscopic Parameters Xf, σf, and εpc Measured in Precracked Specimens
- 7.4 Jump in Fracture Toughness Caused by a Slight Variation of Temperature, Grain Sizes, Loading Rate, and Prestrain
- 7.5 Statistical Model Using Microscopic Parameters to Predict the Global Failure Probability
- 7.6 Distinguishing Feature of the Present Microphysical Model (Micromechanism) of Cleavage Fracture
- Chapter 8: Special Case Studies
- Abstract
- 8.1 Pop-In Phenomenon
- 8.2 Effect of Warm Prestressing (WPS)
- 8.3 Fracture of Multilayer Weldment
- 8.4 Mechanism of Inverse Dependences of COD and Charpy V Toughness on Austenitizing Temperature
- Chapter 9: Brittle Fracture of TiAl Alloys and NiTi Memory Alloys
- Abstract
- 9.1 Experiments for TiAl Alloys
- 9.2 Microcracking Processes: Nucleation and Propagation of Microcracks in TiAl Alloy
- 9.3 Mechanisms of Global Fracture of Specimens of TiAl Alloys
- 9.4 Mechanism of Toughening of TiAl Alloy
- 9.5 Effects of Damage on the Global Fracture of TiAl Alloys
- 9.6 Compression Fracture Mechanism of TiAl Alloys
- 9.7 Micromechanism of Brittle Fracture of the Shape Memory Alloy NiTi
- Nomenclature
- Index
- Edition: 1
- Latest edition
- Published: September 11, 2014
- Language: English
JC
Jianhong Chen
J. H. Chen is a professor in the Faculty of Materials Science and Engineering of Lanzhou University of Technology in China. From 1985 to 1995 he served as President of Gansu University of Technology (now Lanzhou University of Technology). From 2000 to 2003 he was President of the China Welding Society. Dr. Chen has devoted himself to the investigation of the micromechanism of cleavage fracture of metals for more than thirty years and published 70 papers on this subject in international journals.
Affiliations and expertise
Lanzhou University of Science and Technology, ChinaRC
Rui Cao
R. Cao, Dr. of Engineering, is a professor in the Faculty of Materials Science and Engineering of Lanzhou University of Technology in China. She has been investigating the fracture behavior of TiAl alloys and welded dissimilar metals since 2000 and published more than 25 papers on these subjects in international journals.
Affiliations and expertise
Lanzhou University of Science and Technology, ChinaRead Micromechanism of Cleavage Fracture of Metals on ScienceDirect