High entropy alloys9/9/2023 ![]() ![]() Gael Sebald (INSA Lyon, France / ELyT MaX at Tohoku University) Nicolas Mary (INSA Lyon, France / ELyT MaX Lab at Tohoku University) Jean-Yves Cavaillé (INSA Lyon, France / ELyT MaX Lab at Tohoku University) Pierre-Antoine Geslin (Mateis lab, INSA Lyon/CNRS / ELyTMaX Lab at Tohoku University / Institute for Materials Research, Tohoku University) Shimpei Ono (Central Research Institute of Electric Power Industry, Japan)ĭr. Yukitoshi Motome (Department of Applied Physics, The University of Tokyo, Japan)ĭr. Damien Fabrègue (INSA Lyon, France / ELyT MaX Lab at Tohoku University) Qian Niu (Department of Physics, The University of Texas at Austin) Frédéric Gillot (Department of Solid Mechanics, Mechanical Eng. Mickaël Lallart (INSA Lyon, Université de Lyon)Īssoc. Miho Yamauchi (I 2CNER / Kyushu University & AIMR) Kaoru Tamada (IMCE, Kyushu University & AIMR) Kazuhito Tsukagoshi (PI:WPI-MANA, NIMS & AIMR) Yaroslav Blanter (Kavli Institute of Nanoscience, Delft University of Technology)ĭr. Magda Titirici (Imperial College London, U.K.) ![]() Reiko Oda (French National Centre for Scientific Research) Michael Hirscher (Max-Planck-Institute for Intelligent Systems, Germany) Rana Mohtadi (Toyota Research Institute of North America) Masahiro Yoshimura (National Cheng Kung University, Taiwan) Motomu Tanaka (Physical Chemistry of Biosystems, Institute of Physical Chemistry, Heidelberg University, Germany) Douglas Brumley (The University of Melbourne, Australia) Feral Temelli (University of Alberta, Canada)ĭr. The following researchers from around the world have given talks at this event so far, and participants have enjoyed discussion over a cup of tea. About Tea Time TalkĪIMR’s Tea Time Talk is a kind of seminar aiming to promote exchange between world’s eminent researchers and young researchers at AIMR, held in a relaxed atmosphere at AIMR’s Friday Tea Time. This work presents a new microstructural design strategy for beneficially customizing the material performance of high-quality products based on MAM-driven metastability engineering of an alloy with specific chemical composition. Furthermore, the high density of dislocation at cell boundaries also has an effect on not only yield strength enhancement but also on controlling kinetics of metastable plasticity, and it beneficially contributes to obtaining high ductility of the MAM-processed FeMEA. Our results demonstrate that solute segregation at cell boundaries decreases the face-centered cubic phase stability in the matrix and activates the transition of the deformation mechanism from slip to metastable plasticity (i.e., transformation-induced plasticity). While the high dislocation density at cell boundaries contributes to the improvement of yield strength as additional barriers to dislocation movement, the solute segregation at cell boundaries can beneficially control the phase instability of the matrix in materials produced by MAM. Here, we propose an innovative utilization of a unique dislocation network to achieve superior mechanical properties through metastability engineering of high entropy alloy (HEA) and ferrous-medium entropy alloy (FeMEA). The MAM process also induces a unique cell structure with high dislocation density and solute segregation at cell boundaries. Metal additive manufacturing (MAM) offers unprecedented advantages in the fabrication of metals and alloys with complex geometry and unique microstructural features with hierarchical heterogeneity. (Pohang University of Science and Technology (POSTECH), Korea / PI of AIMR) TitleĪdditive Manufacturing of High Entropy Alloys DateĪugust 3 (Thu.), 2023 16:00–17:00 on Japan Time VenueĬombination Room on the 5th floor, AIMR main building Abstract ![]()
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