This book imparts critical knowledge and insights essential for the innovation of new materials through metal 3D printing. It emphasizes the scientific principles necessary for understanding the substantial temperature gradients inherent in powder bed fusion-type additive manufacturing (AM), highlighting crystallization and crystal growth within super-thermal environments. Furthermore, it introduces pioneering research on material creation grounded in these scientific principles. The text also offers practical guidelines for Neo 3D Printing, facilitating the simultaneous management of crystal orientation and microstructure—pivotal determinants of material properties—during the 3D printing process.

As an indispensable guidebook for materials scientists and researchers dedicated to the development of novel materials, it also serves as an invaluable resource for engineers employing 3D printing technologies to confront challenges associated with materials science.

Parts of this book's translation from its Japanese original manuscript were completed with the assistance of artificial intelligence. The author subsequently revised the content.

Dr. Yuichiro Koizumi received his Ph.D. from Osaka University. He is currently a Professor at the Division of Materials and Manufacturing Science, Osaka University. His research interests include additive manufacturing, phase-field method, solidification, phase transformation, and plasticity. Dr. Koizumi has published extensively in internationally renowned journals and has contributed significantly to the advancement of materials science.

Dr. Takayoshi Nakano received his Ph.D. from Osaka University. He is currently a Distinguished Professor at the Division of Materials and Manufacturing Science,Graduate School of Engineering, Osaka University. His research interests includebiomaterials and structural materials design. Dr. Nakano has published extensivelyin internationally renowned journals and has received numerous awards for his contributions to materials science.

Dr. Yoshitaka Adachi received his Doctor of Engineering degree from Nagoya University in July 1996. He is currently a Professor in the Graduate School of Engineering at Nagoya University, where he leads the Materials Design InnovationEngineering division. His research interests encompass materials informatics, 3D/4D characterization techniques, and the development of advanced steels. He has received multiple awards, including the Academic Achievement Award from theIron and Steel Institute of Japan in December 2024.

Dr. Kohei Morishita received his Ph.D. from Kyoto University. He is currently an Associate Professor at Kyushu University. His research focuses on the dynamics of melting and solidification, as well as their interrelation in metals and semiconductors. Dr. Morishita has published numerous articles in internationally renowned journals, contributing significantly to the field of materials science.

Dr. Kazuhisa Sato received his Ph.D. in Materials Science from Osaka Universityin 2005. He is currently a faculty member at the Research Center for Ultra-High Voltage Electron Microscopy, Osaka University. His research focuses on materials science and electron microscopy. Dr. Sato has published extensively ininternationally renowned journals, contributing significantly to the field of materialscharacterization.

Dr. Yoshiaki Toda is a Principal Researcher at the National Institute for Materials Science (NIMS). His research focuses on materials modeling, materials informatics, and data-driven approaches in materials design. Dr. Toda has contributed significantly to the field of materials science through publications in leading journals.

Dr. Takuya Ishimoto received his Ph.D. from Osaka University. He is currently a Professor at the Aluminium Research Center, University of Toyama. His researchinterests include structural and functional materials, with a focus on aluminum alloys. Dr. Ishimoto has published several articles in internationally renowned journals.

Dr. Teiichi Kimura is affiliated with the Japan Fine Ceramics Center (JFCC). His research focuses on advanced ceramic processing, particularly laser sintering techniques. He has contributed to various research projects and academic publications in the field of fine ceramics.

Dr. Albert C. To received his Ph.D. from the Massachusetts Institute of Technology(MIT). He is currently the William Kepler Whiteford Professor at the Department of Mechanical Engineering & Materials Science, University of Pittsburgh. His research interests are in multiscale simulation, computational mechanics, and design optimization for additive manufacturing.