Advanced Joining Technologies

Abstract

Introduction to fundamental aspects of joining technologies of (dis)similar materials for severe operating conditions. Interface reaction processes of metal/alloys/ceramic. While focused on materials issues, issues related to joint design, processing, quality assurance, process economics, and joint performance in service will also be addressed.

Objective

Technical goals, the student will be able to: 1. Describe the fundamentals mechanisms of different joining technologies. Identify advantages and limitations of each method. 2. Be able to apply the basic knowledge on phase diagrams in order to choose the best alloys for joining, process parameters (Temperature and time), joining methods and costs. 3. Describe common types of joining defects and be able to describe their potential influences during application/service. 4. Predict microstructures and/or phase transformations of materials after the joining process based on the phase diagrams information. 5. Identify suitable characterization techniques (destructive and non-destructive testing) and assess the joining properties. 6. Understand diffusion phenomena affecting joining interface during industrial applications and the materials limitations in aggressive environments. 7. Identify and explain the influence of thermal stress affecting the joining interface of common engineering materials.

Content

The most important types of joining and interface mechanisms will be presented and discussed during the different lectures. For each specific joining technology, relevant technology aspects of the process, experimental characterization (destructive and non- destructive) methods will be presented always bringing industry examples for each joining technology. This combination allows the student to connect the basics of material science concepts with practical aspects of joining technology and the research on joining technologies. Following topics will be presented: 1. Introduction to Joining Technologies 2. Phase diagrams and thermodynamics; their importance in joining process 3. The basic metallurgy of welding: Brazing, Transient-Liquid-Phase Bonding and Soldering 4. Coatings and nano-reactive foils as filler materials 5. Advanced joining of alloys and intermetallic alloys 6. Advanced joining of polymers, ceramics and composites 7. Advanced joining with dissimilar materials 8. Characterization techniques: Destructive and Non-destructive methods 9. Defects and joining reliability 10. Corrosion environments and hydrogen embrittlement 11. Joining technologies as repairing technique 12. Other advanced joining methods (e.g. living tissue)

Resources