Faculty Profiles - ADACHI Yoshitaka

Papers - ADACHI Yoshitaka

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A Review on Inverse Analysis Models in Steel Material Design Reviewed International coauthorship

Yoshitaka Adachi, Ta-Te Chen, Fei Sun, Daichi Maruyama, Kengo Sawai, Yoshito Fukatsu, Zhi-Lei Wang

Materials Genome Engineering Advances 2024.12

Maximization of strength–ductility balance of dual-phase steels using generative adversarial networks and Bayesian optimization Reviewed

Yoshihito Fukatsu, Ta-Te Chen, Toshio Ogawa, Fei Sun, Ikumu Watanabe, Mayumi Ojima, Shin Ishikawa and Yoshitaka Adachi

Materials Today Communications Vol. 41 2024.12

Dramatic improvement in strength–ductility balance of dual-phase steels by optimizing features of ferrite phase Reviewed

Kohei Ogatsu, Toshio Ogawa, Ta-Te Chen, Fei Sun, Yoshitaka Adachi

Journal of Materials Research and Technology Vol. 35 page： 289 - 297 2025.1

Comparative study of the experimentally observed and GAN-generated 3D microstructures in dual-phase steels

Watanabe, I; Sugiura, K; Chen, TT; Ogawa, T; Adachi, Y

SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS Vol. 25 ( 1 ) 2024.12

Cellular automaton simulation of solid-phase grain growth under conditions involving scanning heat sources and temperature gradients

Murata, K; Chen, TT; Sun, F; Adachi, Y

MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING Vol. 32 ( 8 ) 2024.12

Quantitative revealing the solute segregation behavior at melt pool boundary in additively manufactured stainless steel using a novel processing method for precise positioning by HAADF-STEM Reviewed

Fei Sun, Yoshitaka Adachi, Kazuhisa Sato, Takuya Ishimoto, Yuichiro Koizumi, Takayoshi Nakano

Materials Characterization 2024.10

Language：English

Laser-powder bed fusion (LPBF) enables the fabrication of complex metallic components by manipulating various laser scan strategies to control microstructure and texture. During processing, multiple thermal cycling and rapid solidification lead to non-equilibrium, non-uniform microstructure in the melt pool and elemental micro-segregation at the melt pool boundary (MPB). However, the characterization of the MPB's accurate localization and the quantitative analysis of segregation behavior at the MPB remain unsolved. In this study, we controlled the crystallographic texture of 316L stainless steel (316LSS) by unique LPBF processing parameters, successfully observed the accurate location of the MPB, and extracted the quantitative concentration using high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) with energy-dispersive X-ray spectroscopy (EDS). Compared with cellular interiors, Cr and Mo were depleted by 0.5-0.7wt%, Mn and Ni were depleted by 0.1-0.3wt%, while Fe was enriched by 1.5wt% at the MPB, which are qualitatively similar to the Scheil-Gulliver solidification simulation results.

Resolving the Long-Standing Discrepancy in Fe3Al Ordering Mobilities: A Synergistic Experimental and Phase-Field Study Reviewed

Yuheng Liu, Madoka Watanabe, Masayuki Okugawa, Takashi Hagiwara, Tsubasa Sato, Yusuke Seguchi, Yoshitaka Adachi, Yoritoshi Minamino, Yuichiro Koizumi

Acta Materialia Vol. 273 2024.7

Evaluation of the Tensile Properties of Vanadium-Added Steels with Different Ferrite and Pearlite Hardness Ratios

Kawamura, M; Ogawa, T; Sun, F; Adachi, Y

JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE Vol. 33 ( 13 ) page： 6816 - 6824 2024.7

Improvement in the Strength-Ductility Balance of Tempered Martensite Steel by Controlling Cementite Particle Size Distribution

Hayakawa, K; Ogawa, T; He, L; Sun, F; Adachi, Y

JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE Vol. 33 ( 13 ) page： 6675 - 6685 2024.7

Machine Learning-Aided Analysis of the Rolling and Recrystallization Textures of Pure Iron with Different Cold Reduction Ratios and Cold-Rolling Directions

Sumida, T; Sugiura, K; Ogawa, T; Chen, TT; Sun, F; Adachi, Y; Yamaguchi, A; Matsubara, Y

MATERIALS Vol. 17 ( 14 ) 2024.7

Analysis of the strength-ductility balance of dual-phase steel using a combination of generative adversarial networks and finite element method

Fukatsu, Y; Chen, TT; Ogawa, T; Sun, F; Adachi, Y; Tanaka, Y; Ishikawa, S

COMPUTATIONAL MATERIALS SCIENCE Vol. 243 2024.7

Delineating the Ultra-Low Misorientation between the Dislocation Cellular Structures in Additively Manufactured 316L Stainless Steel Reviewed

Fei Sun, Yoshitaka Adachi, Kazuhisa Sato, Takuya Ishimoto, Takayoshi Nakano, Yuichiro Koizumi

Materials Vol. 17 ( 8 ) page： 1851 2024.4

Image regression analysis for linking the microstructure and property of steel Reviewed

Kengo Sawai, Ta-Te Chen, Fei Sun, Toshio Ogawa, Yoshitaka Adachi

Results in Materials Vol. 21 page： 100526 2024.1

Simulation of Abnormal Grain Growth Using the Cellular Automaton Method

Murata, K; Fukui, C; Sun, F; Chen, TT; Adachi, Y

MATERIALS Vol. 17 ( 1 ) 2024.1

2D/3D modeling and simulations of grain growth behavior in dual-phase steel using Monte Carlo and machine learning Reviewed

Fei Sun, Ayano Kita, Toshio Ogawa, Ta-Te Chen, Yoshitaka Adachi

Materials Vol. 16 page： 7536 - 7552 2023.12

Simulation of Abnormal Grain Growth Using the Cellular Automaton Method Reviewed

Kenji Murata, Chihiro Fukui, Fei Sun, Ta-Te Chen, Yoshitaka Adachi

Materials 2023.12

Two- and Three-Dimensional Modeling and Simulations of Grain Growth Behavior in Dual-Phase Steel Using Monte Carlo and Machine Learning

Sun, F; Kita, A; Ogawa, T; Chen, TT; Adachi, Y

MATERIALS Vol. 16 ( 24 ) 2023.12

Evaluation of Austenite–Ferrite Phase Transformation in Carbon Steel Using Bayesian Optimized Cellular Automaton Simulation Reviewed

Sun, Fei, Mino, Yoshihisa, Ogawa, Toshio, Chen, Ta-Te, Natsume, Yukinobu, Adachi, Yoshitaka

Materials Vol. 16 ( 21 ) page： 6922 - 6945 2023.11

Analysis of Crystal Orientation in Two-Way Cold-Rolled and Annealed Pure Iron

Suzuki, Y; Ogawa, T; Sun, F; Adachi, Y; Yamaguchi, A; Matsubara, Y

TETSU TO HAGANE-JOURNAL OF THE IRON AND STEEL INSTITUTE OF JAPAN Vol. 109 ( 9 ) page： 50 - 58 2023.9

The initial grain size effect on the tensile-deformed microstructure in Type 310S austenitic stainless steel Reviewed

Kodai Takeshita,Toshio Ogawa,Fei Sun, Yoshitaka Adachi

Materials Letters Vol. 341 page： 134285 2023.6

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Papers - ADACHI Yoshitaka