Intro
Preface
About This Book
Contents
About the Author
1 Fundamentals of Dissimilar Metal Joining
1.1 Need
1.2 Types of Dissimilar Metal Joints
1.3 Issues in Dissimilar Metal Joining
1.4 Parent Metal Characteristics and Dissimilar Metal Joining
1.4.1 Physical Properties
1.4.2 Mechanical Properties
1.4.3 Chemical Composition
1.4.4 Dimension Characteristics
1.5 Approaches to Address Issues of Dissimilar Metal Joining
1.5.1 Selection of Appropriate Joining Technology
1.5.2 Using Transition/Tri-metallic Joint
1.5.3 Dilution

1.5.4 Electrode, Filler Metal and Interlayer
1.5.5 Buttering and Cladding
1.5.6 Thermal and Mechanical Treatment
1.6 Performance Parameters of Dissimilar Metal Joints
References
2 Fundamentals of Dissimilar Metal Joining by Arc and Resistance Welding Processes
2.1 Introduction
2.2 Asymmetric Weld
2.2.1 Segregation
2.2.2 Unmixed Zone Formation
2.2.3 Intermetallic Compound Formation
2.2.4 Hardening of HAZ
2.2.5 Softening and Weakening of HAZ
2.2.6 Unfavourable Metallurgical Transformation
2.3 Residual Stress and Distortion
2.4 Corrosion Behaviour

2.5 Fusion Welding Processes for Dissimilar Metal Joining
2.5.1 Gas Tungsten Arc Welding
2.5.2 Gas Metal Arc Welding
2.5.3 Shielded Metal Arc and Submerged Arc Welding
2.6 Resistance Spot Welding
2.7 Brazing and Braze Welding
References
3 Dissimilar Metal Joining by Laser Welding
3.1 Fundamental of Laser Welding
3.2 Common Issues in Laser Welding
3.2.1 Embrittlement
3.2.2 Porosity
3.2.3 Solidification Cracking
3.2.4 Weld Bead Sagging
3.2.5 Misalignment and Misfit
3.2.6 Lack of Penetration and Fusion
3.2.7 Asymmetric Weld
3.2.8 Residual Stresses

3.2.9 Undesirable Metallurgical Transformations
3.3 Weldability by Laser Welding
3.3.1 Section Thickness
3.3.2 Physical Properties of Parent Metal
3.3.3 Metallurgical and Chemical Properties of Parent Metals
3.4 Few Approaches for Joining of Specific Dissimilar Metal Combinations
3.4.1 Joining of Al with Other Metals
3.4.2 Joining of Cu with Other Metals
3.5 Few Advances on Laser Welding and Brazing
3.5.1 Laser Welding of Alloy Steel and Stainless Steel
3.5.2 Laser Welding of Stainless Steel and Copper

3.5.3 Laser Welding of Alloy Steel/Stainless Steel and Aluminium
3.5.4 Laser Brazing of Aluminium and Steel
3.5.5 Laser Welding of Copper and Aluminium
3.5.6 Laser Welding of Aluminium and Aluminium Matric Composite
References
4 Dissimilar Metal Joining by Solid-State Joining Technologies
4.1 Introduction
4.2 Mechanism(s) of Solid-State Joining Processes
4.2.1 Metallic Bonding
4.2.2 Diffusion
4.2.3 Localized Melting
4.2.4 Dynamic Recrystallization
4.2.5 Mechanical Interlocking
4.3 Prerequisites for Solid-State Joining
4.3.1 Metallic Intimacy