High-Entropy Alloys

Chapter 1: A brief history of alloys and the birth of high-entropy alloys

• • 1.1 Introduction
• • 1.2 The coming of alloys
• • 1.3 Special alloys and composites
• • 1.4 The coming of multicomponent HEAs
• • 1.5 The scope of this book

Chapter 2: High-entropy alloys: basic concepts

• • 2.1 Introduction
• • 2.2 Classification of phase diagrams and alloy systems
• • 2.3 Definition of HEAs
• • 2.4 Composition notation
• • 2.5 Four core effects of HEAs

Chapter 3: Physical metallurgy of high-entropy alloys

• • 3.1 Introduction
• • 3.2 Diffusion behavior
• • 3.3 Phase transformations
• • 3.4 Deformation behavior

Chapter 4: Alloy design and phase selection rules in high-entropy alloys

• • 4.1 Introduction
• • 4.2 Predicting solid solubility from Hume-Rothery rules
• • 4.3 Mutual solubility and phase formation tendency in HEAs
• • 4.4 Parametric approaches to predict crystalline solid solution and metallic glass
• • 4.5 Pettifor map approach to predict the formation of IM, quasicrystal and glass
• • 4.6 Phase separation approach to find single-phase HEAs

Chapter 5: Alloy Design in the 21st century: ICME and materials genome and artificial intelligence strategies

• • 5.1 Introduction
• • 5.2 Integrated computational materials engineering
• • 5.3 The advent of artificial intelligence

Chapter 6: Synthesis and processing

• • 6.1 Introduction
• • 6.2 Liquid metallurgy route
• • 6.3 Additive manufacturing
• • 6.4 Solid state processing route
• • 6.5 Carbothermal shock (CTS) synthesis
• • 6.6 Combinatorial materials synthesis

Chapter 7: Solid Solution phases and their microstructures in HEAs

• • 7.1 Introduction
• • 7.2 Solid solution formation in equiatomic HEAs
• • 7.3 Solid solution formation in nonequiatomic HEAs
• • 7.4 Microstructure of HEAs
• • 7.5 Thermal stability of HEAs

Chapter 8: Special subgroups of high-entropy alloys

• • 8.1 Introduction
• • 8.2 Transition metal HEAs
• • 8.3 Refractory HEAs
• • 8.4 Other HEA families
• • 8.5 Intermetallic compounds
• • 8.6 Interstitial compounds (Hagg phases)
• • 8.7 Metallic glasses

Chapter 9: High-entropy ceramics

• • 9.1 Introduction
• • 9.2 High-entropy nitrides
• • 9.3 High-entropy oxides
• • 9.4 High-entropy diborides
• • 9.5 High-entropy composites
• • 9.6 High-entropy cemented carbides and cermets

Chapter 10: High-entropy alloy coatings

• • 10.1 Introduction
• • 10.2 Classification of hard coatings
• • 10.3 Conventional hard coatings
• • 10.4 High-entropy thin film coatings
• • 10.5 High-entropy thick film coatings

Chapter 11: Structural properties

• • 11.1 Introduction
• • 11.2 Mechanical properties
• • 11.3 Wear properties
• • 11.4 Electrochemical properties
• • 11.5 Oxidation behavior

Chapter 12: Functional properties

• • 12.1 Introduction
• • 12.2 Diffusion barrier properties
• • 12.3 Electrical properties
• • 12.4 Thermal properties
• • 12.5 Magnetic properties
• • 12.6 Hydrogen storage properties
• • 12.7 Irradiation resistance
• • 12.8 Catalytic properties
• • 12.9 Thermoelectric properties

Chapter 13: Applications and future directions

• • 13.1 Introduction
• • 13.2 Goals of property improvement
• • 13.3 Advanced applications demanding new materials
• • 13.4 Examples of applications
• • 13.5 Patents on HEAs and related-materials
• • 13.6 Future directions