A5090592923- Microstructure and Mechanical Properties of Steels
- Hydrogen embrittlement and corrosion behaviors in metals
- Metal Alloys Wear and Properties
- Microstructure and mechanical properties
- Metallurgy and Material Forming
- Metal and Thin Film Mechanics
- Fatigue and fracture mechanics
- High Temperature Alloys and Creep
- Magnetic Properties and Applications
- Corrosion Behavior and Inhibition
- Material Properties and Failure Mechanisms
- Titanium Alloys Microstructure and Properties
- Aluminum Alloy Microstructure Properties
- Nuclear Materials and Properties
- High Entropy Alloys Studies
- Advanced materials and composites
- Welding Techniques and Residual Stresses
- Shape Memory Alloy Transformations
- High-Temperature Coating Behaviors
- Aluminum Alloys Composites Properties
- Non-Destructive Testing Techniques
- Surface Treatment and Residual Stress
- Advanced Materials Characterization Techniques
- Fusion materials and technologies
- Force Microscopy Techniques and Applications
Kyushu University
2015-2024
National Institute for Materials Science
2013-2024
Kyoto University
1995-2023
Tohoku University
2021-2023
Institute for Materials Research, Tohoku University
2022
IMDEA Materials
2022
Institute of Strength Physics and Materials Science
2004-2020
Norsk Hydro (Germany)
2016-2019
Norsk Hydro (Sweden)
2019
Kyushu Institute of Technology
2016-2018
Dual-phase (DP) steel is the flagship of advanced high-strength steels, which were first among various candidate alloy systems to find application in weight-reduced automotive components. On one hand, this a metallurgical success story: Lean alloying and simple thermomechanical treatment enable use less material accomplish more performance while complying with demanding environmental economic constraints. other enormous literature on DP steels demonstrates immense complexity microstructure...
Materials are typically ductile at higher temperatures and become brittle lower temperatures. In contrast to the typical ductile-to-brittle transition behavior of body-centered cubic (bcc) steels, we observed an inverse temperature dependence toughness in ultrahigh-strength bcc steel with ultrafine elongated ferrite grain structure that was processed by a thermomechanical treatment without addition large amount alloying element. The enhanced is attributed delamination result crack branching...
Fatigue failures create enormous risks for all engineered structures, as well human lives, motivating large safety factors in design and, thus, inefficient use of resources. Inspired by the excellent fracture toughness bone, we explored fatigue resistance metastability-assisted multiphase steels. We show here that when steel microstructures are hierarchical and laminated, similar to substructure superior crack can be realized. Our results reveal tuning interface structure, distribution,...
This paper gives an overview of recent progress in microstructure-specific hydrogen mapping techniques. The challenging nature with high spatial resolution, i.e. at the scale finest microstructural features, led to development various methodologies: thermal desorption spectrometry, silver decoration, microprint technique, secondary ion mass spectroscopy, atom probe tomography, neutron radiography, and scanning Kelvin probe. These techniques have different characteristics regarding temporal...
Abstract Structure evolution taking place in pure polycrystalline copper was studied multiple compressions at room temperature. Rectangular samples were compressed with consequent change the loading direction from pass to pass. The deformation behaviour high strains of above 2 shows an apparent steadystate flow following a rapid rise stress early stage deformation. structural changes are characterized by many mutually crossing subboundaries low moderate strains, finally followed development...
Metallographic characteristics of lath martensite stTllcture were investigated ill detail in pure Fe-C alloys and plain carbon commercial steels containing liP to O.B % C, Fe-0.2 C-X (X: about 1% ifMn, Si, i, Cr or Mo) an 1B% Ni maraging steel.In the Fc-C steels, both jJackets blocks are clearly observed structure less than 0.2 ";o C. With increase content from 0.5 gradually extinguished finally become difficult observe, although packets still fo und.When is more not only but also tlze...