A5080455111- Intermetallics and Advanced Alloy Properties
- Microstructure and mechanical properties
- Aluminum Alloys Composites Properties
- Metallurgical and Alloy Processes
- Titanium Alloys Microstructure and Properties
- Metallic Glasses and Amorphous Alloys
- Microstructure and Mechanical Properties of Steels
- Metal and Thin Film Mechanics
- High-Velocity Impact and Material Behavior
- Carbon Nanotubes in Composites
- Optical Coatings and Gratings
- Photonic and Optical Devices
- Crystallization and Solubility Studies
- Polymer Nanocomposite Synthesis and Irradiation
- High Temperature Alloys and Creep
- Marine Sponges and Natural Products
- Shape Memory Alloy Transformations
- X-ray Diffraction in Crystallography
- Chemical Synthesis and Analysis
- Thermodynamic and Structural Properties of Metals and Alloys
- Plasmonic and Surface Plasmon Research
- Fusion materials and technologies
- Advanced ceramic materials synthesis
- Hydrogen Storage and Materials
- Photonic Crystals and Applications
Nagoya University
2019-2021
Okayama Prefectural University
2020
Kitami Institute of Technology
2013
Osaka University
2009-2010
Tohoku University
1981-2007
Institute for Materials Research, Tohoku University
1993
Superplasticity in a recrystallized Ni3Al polycrystal doped with boron was investigated. Superplastic flow maximum elongation of 160% observed under the condition an ultra fine grain size (1.6 μm) at low initial strain rate (≤1.04×10−4s−1) and 973 K. A stress high strain-rate sensitivity index were attained these conditions.The occurrence dynamic recrystallization (DR) verified by transmission electron microscope (TEM), DR believed to be important mechanism superplastic deformation as...
The crystallography of B2→7R stress-induced martensitic transformation in a Ni-37.0 at%Al alloy was studied using single crystals. experimental results were compared with predictions the phenomenological crystallographic theory. simultaneously measured habit planes and orientation relationship between parent martensite showed excellent agreement theory, for lattice invariant shear faulting on basal plane. Thus, theory confirmed to apply well present Ni–Al as well. two transformations B2→3R...
Superelasticity of β Ti-16 at%Nb-4.8 at%Sn alloy consisting non- (or minimal-) cytotoxic elements was investigated for biomedical applications as functions deformation temperature and aging heat treatment after quenching. As-quenched Ti-16Nb-4.8Sn having Af (the reverse martensitic transformation finish temperature) 266 K exhibits superelasticity at human body (310 K) with an elastic recovery strain 3.2%. decreases increasing in the range 353 to 423 or time K. It is confirmed from TEM...
Estrogenic and cardiotonic steroidal skeletons were concisely constructed via Mizoroki–Heck intramolecular Diels–Alder (IMDA) reactions. Simple modification of the dienophile unsaturation IMDA precursor enabled representative AB-ring systems both steroid classes to be accessed from same intermediate. The diastereoselectivity reaction used access skeleton was found significantly enhanced by performing in water.
The total synthesis of (+)-cannogenol, an aglycon common to various biologically important cardiotonic glycosides, has been achieved. Synthesis the versatile intermediate involves Mizoroki–Heck and intramolecular Diels–Alder reactions from enantiomerically pure CD-ring segment, newly prepared in a multidecagram scale this time. Total by site-selective transformations demonstrated applicability our synthetic approach.
The yield stress and slip plane in Fe3Al0.8Si0.2 having the critical ordering temperature of B2-DO3 transformation Tc=1028 K were investigated at temperatures between 77 1100 with respect to their dependence on orientation. A peak takes place 880 except crystal whose maximum resolved shear coincides twinning {112} plane. In crystals which exhibit strength, operative changes from {110} antiphase boundary energy is lowest (below temperature) (above peak). strength attributed Stoloff Davies’...
Tensile tests at room temperature were performed on a boron-doped Ni76Al19Ti5 single crystal to investigate the effect of boron deformation and fracture behavior crystalline Ni3Al-base intermetallic compounds. Both yield stresses larger than those undoped Ni75Al20Ti5 reported previously, whereas both elongation work-hardening rate two crystals almost same given orientation.By addition, mixed modes {111} planes non-crystallographic found become predominant with suppressed cleavage appearance,...
The nondestructive mixing properties of optical resonance modes were investigated using a structure with dielectric sandwiched between metallic sub-wavelength cut-through slit-array slabs. For the un-shifted configuration, mode repulsion around intersection was more enhanced for an intermediate greater refractive index, though no anticrossing characteristic seen air-gap structure. On other hand, lateral shift slit arrays effects even geometrically dependent characteristics are interpreted in...
The transmittance properties for the stacked metallic sub-wavelength slit arrays were experimentally and numerically investigated. calculated spectra based on FDTD method well reproduced experimental spectra. details of airgap space dependence measured, characteristic behavior multiple optical modes are observed.