Keyword: D - TU Research Profiles

"D" Keywords - 63 Result(s)

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D

[ductility]

Advanced Control of Microstructure and Property of Structural Metallic Materials

特徴・独自性

Microstructure represents various kinds of heterogeneities in the metallic materials, i.e., grains, component phase, lattice defects and chemical inhomogeneity such as impurity/alloying elements. It can be modified through control of phase transformation/precipitation and deformation/recrystallization by adjusting compositions of materials and/or through processing routes (heat treatment, deformation). Such expertise in micro/nanostructure control is very important in production of current materials from viewpoints of energy saving and recycling in structural materials such as steels and titanium alloys.
We attempt to apply more advanced control of micro/nanostructures, such as atomic structures of crystalline interfaces, chemistory in an atomic scale (e.g., segregation) and so on. Fundamentals of microstructure formation (thermodynamics, kinetics, crystallography) are examined both theoretically and experimentally to clarify key factors for microstructure control. Another important aspect in our research is the improvement of mechanical property by microstructure manipulation.

実用化イメージ

Possibilities to establish new functions (e.g., superplasticity, shape memory/superelasticity) as well as superior mechanical properties (e.g., ultrahigh strength with high toughness/ductility) is also explored.

Researchers

Institute for Materials Research

Tadashi Furuhara

[durability]

Development of functional concrete

概要

Concrete, which supports human society, is the research target for developing various functions. For example, research targets include fiber-reinforced cementitious composite (FRCC) to improve mechanical properties, self-healing concrete to improve durability, and a concrete 3D printing system to enable free modeling. The functional concrete materials will be a means to meet the needs for concrete materials in recent years.

従来技術との比較

By imparting innovative functions to concrete, a common and ubiquitous material that literally supports human society, we aim to add significant value. This includes extending the service life of structures, enabling labor-saving construction, and achieving new designs and expressions that were previously unattainable.

特徴・独自性

Self-healing concrete aims to prolong the service life of concrete structures by controlling cracks.
Fiber-reinforced concrete enhances the toughness and safety of concrete materials, which are typically brittle and weak under tensile forces.
Concrete 3D printing seeks to unmanned construction sites, which have long been criticized for their low productivity, while also exploring new possibilities in design.

実用化イメージ

Construction companies, maintenance management, building materials manufacturers, etc.
New construction and its maintenance management by new functional concrete materials will be Proposed.

Researchers

Graduate School of Engineering

Tomoya Nishiwaki

[Dynamic Cardiac Property]

Noninvasive Ultrasonic Measurement of Dynamic Properties of Heart and Arteries

特徴・独自性

Complexity of the cardiac contraction sequence is still not fully understood because the dynamic mechanical excitation process, which directly correlates with contraction, cannot be accurately measured by CT, MRI, SPECT, or conventional ultrasound. By developing a noninvasive novel imaging modality with high temporal and spatial resolutions (US patent 5840028), we have detected the minute mechanical response (velocity component) to the propagation of the action potential in the human heart or to detect the propagation of the vibrations along the heart wall caused by the valve closure (Fig. 2).
By applying the same procedure to the human arteries, the regional change in wall thickness caused during one cardiac cycle can be measured with high spatial resolution (Fig. 1). From the measurement, the regional elasticity of tissue surrounding atherosclerotic plaque can be determined. By comparing the pathological findings with the distribution of elasticity, elasticity of lipid and that of fibrous tissue were determined. Thus, each point inside the plaque is classified into lipid or fibrous tissue using transcutaneous ultrasound (Fig. 3).

実用化イメージ

This novel method offers potential as a diagnostic technique for detection of plaque vulnerability with high spatial resolution.
We are prepared to provide academic consultations to companies interested in our research.

Researchers

Graduate School of Engineering

Hiroshi Kanai

"D" Keywords - 63 Result(s)

D

[ductility]

Advanced Control of Microstructure and Property of Structural Metallic Materials

Researchers

[durability]

[Dynamic Cardiac Property]

Noninvasive Ultrasonic Measurement of Dynamic Properties of Heart and Arteries

Researchers

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