Part Ⅰ High Temperature Deformation

1 Creep Behavior of Materials

1.1 Creep Curve

1.2 Stress and Temperature Dependence of Creep Rate

1.3 Stacking Fault Energy Effect

1.4 Grain Size Effect

References

2 Evolution of Dislocation Substructures During Creep

2.1 Parameters of Dislocation Substructures and Their Measurements

2.2 Evolution of Dislocation Substructure during Creep

2.3 Dislocation Substructure of Steady State Creep

2.4 Inhomogeneous Dislocation Substructure and Long-Range Internal Stress

References

3 Dislocation Motion at Elevated Temperatures

3.1 Thermally Activated Glide of Dislocation

3.2 Measurement of Internal Stress

3.3 Climb of Dislocations

3.4 Basic Equations of Recovery Creep

3.5 Mechanisms of Recovery

References

4 Recovery-Creep Theories of Pure Metals

4.1 Introduction

4.2 Weertman Model

4.3 Models Considering Sub-Boundary

4.4 Models Based on Dislocation Network

4.5 Creep Model Based on the Motion of Jogged Screw Dislocation

4.6 Summary of Recovery Creep Models

4.7 Soft and Hard Region Composite Model

4.8 Harper-Dorn Creep

References

5 Creep of Solid Solution Alloys

5.1 Interaction Between Dislocation and Solute Atom

5.2 Creep Behavior of Solid Solution Alloys

5.3 Viscous Glide Velocity of Dislocations

5.4 Creep Controlled by Viscous Glide of Dislocations

References

6 Creep of Second Phase Particles Strengthened Materials

6.1 Introduction

6.2 Arzt-Ashby Model

6.3 Creep Model Based on Attractive Particle-Dislocation Interaction

6.4 Interaction of Dislocation with Localized Particles

6.5 Mechanisms of Particle Strengthening

6.6 Grain Boundary Precipitation Strengthening

References

7 Creep of Particulates Reinforced Composite Material

7.1 Creep Behavior of Particulates Reinforced Aluminium Matrix Composites

7.2 Determination of Threshold Stress

7.3 Creep Mechanisms and Role of Reinforcement Phase

References

8 High Temperature Deformation of Intermetallic Compounds

8.1 Crystal Structures,Dislocations and Planar Defects

8.2 Dislocation Core Structure

8.3 Slip Systems and Flow Stresses of Intermetallic Compounds

8.4 Creep of Intermetallic Compounds

8.5 Creep of Compound-Based ODS Alloys

References

9 Diffusional Creep

9.1 Theory on Diffusional Creep

9.2 Accommodation of Diffusional Creep:Grain Boundary Sliding

9.3 Diffusional Creep Controlled by Boundary Reaction

9.4 Experimental Evidences of Diffusional Creep

References

10 Superplasticity

10.1 Stability of Deformation

10.2 General Characteristics of Superplasticity

10.3 Microstructure Characteristics of Superplasticity

10.4 Grain Boundary Behaviors in Superplastic Deformation

10.5 Mechanism of Superplastic Deformation

10.6 The maximum Strain Rate for Superplasticity

References

11 Mechanisms of Grain Boundary Sliding

11.1 Introduction

11.2 Intrinsic Grain Boundary Sliding

11.3 Extrinsic Grain Boundary Sliding

References

12 Multiaxial Creep Models

12.1 Uniaxial Creep Models

12.2 Mutiaxial Creep Models

12.3 Mutiaxial Steady State Creep Model

12.4 Stress Relaxation by Creep

References

Part Ⅱ High Temperature Fracture

13 Nucleation of Creep Cavity

13.1 Introduction

13.2 Nucleation Sites of Cavity

13.3 Theory of Cavity Nucleation

13.4 Cavity Nucleation Rate

References

14 Creep Embrittlement by Segregation of Impurities

14.1 Nickel and Nickel-Base Superalloys

14.2 Low-Alloy Steels

References

15 Diffusional Growth of Creep Cavities

15.1 Chemical Potential of Vacancies

15.2 Hull-Rimmer Model for Cavity Growth

15.3 Speight-Harris Model for Cavity Growth

15.4 The role of Surface Diffusion

References

16 Cavity Growth by Coupled Diffusion and Creep

16.1 Monkman-Grant Relation

16.2 Beer-Speight Model

16.3 Edward-Ashby Model

16.4 Chen-Argon model

16.5 Cocks-Ashby Model

References

17 Constrained Growth of Creep Cavities

17.1 Introduction

17.2 Rice Model

17.3 Raj-Ghosh Model

17.4 Cocks-Ashby Model

References

18 Nucleation and Growth of Wedge-Type Microcracks

18.1 Introduction

18.2 Nucleation of Wedge-Type Cracks

18.3 The Propagation of Wedge-Type Cracks

18.4 Crack Growth by Cavitation

References

19 Creep Crack Growth

19.1 Crack-Tip Stress Fields in Elastoplastic Body

19.2 Stress Field at Steady-State-Creep Crack Tip

19.3 The Crack Tip Stress Fields in Transition Period

19.4 Vitek Model for Creep Crack Tip Fields

19.5 The Influence of Creep Threshold Stress

19.6 The Experimental Results for Creep Crack Growth

References

20 Creep Damage Mechanics

20.1 Introduction to the Damage Mechanics

20.2 Damage Variable and Effective Stress

20.3 Kachanov Creep Damage Theory

20.4 Rabotnov Creep Damage Theory

20.5 Three-Dimensional Creep Damage Theory

References

21 Creep Damage Physics

21.1 Introduction

21.2 Loss of External Section

21.3 Loss of Internal Section

21.4 Degradation of Microstructure

21.5 Damage by Oxidation

References

22 Prediction of Creep Rupture Life

22.1 Extrapolation Methods of Creep Rupture Life

22.2 θ Projection Method

22.3 Maruyama Parameter

22.4 Reliability of Prediction for Creep Rupture Property

References

23 Creep-Fatigue Interaction

23.1 Creep Fatigue Waveforms

23.2 Creep-Fatigue Failure Maps

23.3 Holding Time Effects on Creep-Fatigue Lifetime

23.4 Fracture Mechanics of Creep Fatigue Crack Growth

References

24 Prediction of Creep-Fatigue Life

24.1 Linear Damage Accumulation Rule

24.2 Strain Range Partitioning

24.3 Damage Mechanics Method

24.4 Damage Function Method

24.5 Empirical Methods

References

25 Environmental Damage at High Temperature

25.1 Oxidation

25.2 Hot Corrosion

25.3 Carburization

References

Appendix A

Appendix B

Index