**About the Editors**

#### **Talal Al-Samman**

Dr.-Ing. Talal Al-Samman is a senior scientist and chief engineer at the Institute of Physical Metallurgy and Material Physics of the RWTH Aachen University, where he also earned his Ph.D. in Engineering Sciences (2008). His research is concerned with advanced structural materials for lightweight applications, focusing on the science and engineering of magnesium alloys and their potential use to lighten automotive structures given their excellent strength to weight ratios. In recent years, he and his group have made influential contributions to understanding deformation mechanisms, recrystallization and grain growth annealing phenomena, and crystallographic texture evolution in HCP metals, which dictate their mechanical performance and operational stability. On the basis of a comprehensive physical understanding of the underlying mechanisms of microstructure and texture evolution, he has introduced various concepts of microstructure and texture engineering in order to improve the cold formability and elevated temperature strength of commercial magnesium alloys.

#### **Sangbong Yi**

Dr.-Ing. Sangbong Yi studied Materials Science and Engineering at the Kumoh National Institute of Technology in South Korea and received his doctorate (Dr.-Ing.) on the deformation mechanisms in magnesium alloys from Clausthal University of Technology, Germany, in 2005. He worked as scientist at the Department of Microstructure Physics, Max Planck Institute for Iron Research, Duesseldorf, studying the textures of metallic and biomaterials until 2006. After that, he worked at the Institute of Materials Science and Technology, Clausthal University of Technology on mechanical surface treatments and recrystallization behaviors until 2008. Since that, he has been employed in the Helmholtz-Zentrum Hereon as a senior researcher. His research interest is focused on the process–microstructure–property relationship in lightweight metallic materials. His area of expertise covers alloy and microstructure design, electron and X-ray diffraction, and sheet processing via continuous casting technology.

#### **Dietmar Letzig**

Dr. D. Letzig studied physics at the Christian-Albrecht University in Kiel and at the University of Hamburg, and worked as a scientist in the Department of Physical Metallurgy at the Max Planck Institute for Iron Research Duessldorf, Germany. In 1995, he received his PhD on the development of intermetallic phases at the Technical University RWTH Aachen, Germany. After that, he was employed until 2000 as a research scientist in the R&D Centre at Alcan International Limited in Banbury, GB, and developed new 6xxx series aluminum alloys and designed their processing for the European Automotive Manufacturing System. Since then, he has been head of the Department of Wrought Magnesium Alloys at the Helmholtz Research Center, Geesthacht, which was renamed in 2020 as the Helmholtz-Zentrum Hereon. He is the author of many papers in peer-reviewed scientific journals and proceedings of international conferences. His area of expertise is the process–microstructure–property relationship of lightweight materials, and particularly wrought magnesium alloys. He is leading fundamental, as well as application-oriented research projects in metal forming processes, and is an expert in the processing of magnesium sheets via twin roll casting technology and their performance optimization.
