Preface

This Symposium focusses on the microstructures of metallic samples and components prepared by additive manufacturing (AM), but covers also comparative aspects of microstructural evolution during conventional thermomechanical processing, where this is informative for understanding microstructures resulting from AM. AM of metals has become very popular as a next generation digitally-driven manufacturing technique, and huge successes have already been achieved in obtaining high material densities, as well as in managing stress relief to allow precise control of component shapes. However, proper characterization of metal microstructures formed through AM still lags behind these successes. In particular, the potential for property optimization through microstructural engineering has hardly been explored yet for metal AM. As a reflection of this, the 44th Risø International Symposium focus on 2D and 3D characterization of additively manufactured metal microstructures, the in-service microstructural evolution of components made using AM, relationships between microstructure and properties, and the possibilities for optimizing metal microstructures during the AM process, as well as by use of post-AM treatments, as studied through either experiments or simulations. Contributions regarding all types of metal AM processes are included, as are those relating microstructures to a wide range of properties, from mechanical to physical and chemical. Contributions based both on experimental as well as on theoretical work are embraced. The Symposium Proceedings contains 7 keynote papers, 7 invited papers, and 31 contributed papers, covering a wide range of topics including: • Characterization of AM microstructures • Simulation of AM microstructures • Relations between AM processing and AM microstructures • Relations between AM microstructures and properties • Comparison between AM microstructures and those evolving during conventional manufacturing (e.g. during rolling, and annealing) • Design of defect-tolerant microstructures in additively manufactured metals • Microstructural enhancements using advanced AM processing and metal combinations for better properties • Possibilities in use of post-AM microstructural engineering treatments • Microstructural evolution during in-service operation of AM components • Challenges related to microstructural optimization for practical applications of AM components List of Local Organizing Committee, International Advisory Committee and Editorial Committee are available in this Pdf.