High-Entropy Alloys, Second Edition provides a complete review of the current state of the field of high entropy alloys (HEA). Building upon the first edition, this fully updated release includes new theoretical understandings of these materials, highlighting recent developments on modeling and new classes of HEAs, such as Eutectic HEAs and Dual phase HEAs. Due to their unique properties, high entropy alloys have attracted considerable attention from both academics and technologists. This book presents the fundamental knowledge, the spectrum of various alloy systems and their characteristics, key focus areas, and the future scope of the field in terms of research and technological applications.
Key Features
- Provides an up-to-date, comprehensive understanding on the current status of HEAs in terms of theoretical understanding and modeling efforts
- Gives a complete idea on alloy design criteria of various classes of HEAs developed so far
- Discusses the microstructure property correlations in HEAs in terms of structural and functional properties
- Presents a comparison of HEAs with other multicomponent systems, like intermetallics and bulk metallic glasses
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
