Ishii, Yuki

Japanese

Affiliation	Department of Mechanical Engineering
Title	Assistant Professor
Fields of Research	Metallurgy / Physical Properties of Metallic Materials / Structural Materials / Microstructure Control
Degree	Ph. D. (March 2024, Ibaraki University)
Academic Societies	The Japan Institute of Light Metals / The Japan Institute of Metals and Materials / The Japan Society of Mechanical Engineers / The Iron and Steel Institute of Japan / The Japan Society for Technology of Plasticity / Japan Institute of Copper
E-mail	y-ishii@me Please append ".tut.ac.jp" to the end of the address above.
Laboratory website URL	http://martens.me.tut.ac.jp/
Researcher information URL（researchmap）	Researcher information

Research

I am working to enhance the mechanical functionality of metallic materials by making full use of parameters such as alloy composition, fabrication process, and heat treatment, evaluating strength and deformation properties from micro and macro perspectives, actively utilizing unconventional microstructural factors, and elucidating unique strengthening and deformation mechanisms.

Theme1：Mechanical functional enhancement of metallic materials by controlling high-density lattice defects

Overview

To realize a carbon-neutral society, metallic materials must have higher strength and ductility. In this research, we are working to improve the mechanical functionality of metallic materials by controlling high-density lattice defects using high-pressure torsion (HPT), a type of severe plastic deformation, and heavy cold rolling (CR), which is widely used in industry, as microstructure control methods other than conventional alloy composition and heat treatment, and also by controlling microstructures through processing and heat treatment in combination with HPT and CR. We are working to improve the mechanical functionality of metallic materials by controlling the microstructure through heat treatment.

Selected publications and works

(1) Y. Ishii, J. Kobayashi, E. Kobayashi, M. Ohnuma, S. Kuramoto and G. Itoh: "Effect of Process Condition and Test Environment on Tensile Properties in Cold-Rolled Al-Cu-Mg Alloys", Solid State Phenomena, 353 (2023), 91-96.
(2) H. Fukuzawa, Y. Ishii, J. Kobayashi, E. Kobayashi, M. Ohnuma, S. Kuramoto and G. Itoh: J.JILM, 73 (2023), 592-597.

Keywords

Severe plastic deformation / High-pressure torsion (HPT) / Heavy cold rolling / Machining heat treatment / Structural materials / Microstructure control

Theme2：Research on microstructure control method for suppression of hydrogen embrittlement in high-strength metallic materials

Keywords

Hydrogen embrittlement / Slow strain rate technique / Thermal desorption analysis / Microstructure control / Structural materials

Title of class

Machine Fundamental Experiments of Engineering（B11510110）/ Creative Experiment for Mechanical Engineering（B11610101）/ Physics Laboratory（B1013009a）