Fundamental
Research
(1) Guiding principles of new findings for innovative ultra-steels
- Development of guiding principles for innovative ultra-steel.
- Development of innovative analysis to clarify the new findings.
■Current results
- Proposal of a new mechanism for high
temperature strength (carbon-free martensitic alloy, fully annealed high Cr
steel).
- Development of new technology for
stabilizing the surface by the formation of tight alloy coating layer.
- Proposal of ideal microstructures with high resistance to delayed fracture
based on nano-analysis. (Fig. 1)
- Proposal
of a new quantitative evaluation method for
delayed fracture based on the local approach.
(2) Standardization based on nano-meso-macroscopic
analysis and evaluation of properties
- Defacto standardization of developed
analysis and evaluation method, and nano-meso-macroscopic
and long-term data. (Fig.2)
- Investigation of new seeds for next generation.
■Current
results
- Development
of nano-meso-macroscopic analysis and evaluation methods using TEM, AFM and
nano-indentation for creep strength of heat resistant steel, fatigue strength
of ultra-high strength martensitic steel and corrosion of weathering steel.
- Evaluation
of creep strength of 100,000hrs., giga-cycle fatigue of 10 billion hrs. and
atmospheric corrosion of 10 years.
- Proposal of a short-term evaluation method for creep and giga-cycle fatigue
testing method.
