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Creep Property Group
Members
Kota Sawada
Group Leader, Creep Property Group, Materials Evaluation Field, Research Center for Structural Materials
Keyword : heat-resistant steel, long-time creep properties, heat-to-heat variation, material degradation, segregation
Tomotaka Hatakeyama
Researcher, Creep Property Group, Materials Evaluation Field, Research Center for Structural Materials
Keyword : heat-resistant steel, modified 9Cr-1Mo steel, 3D additive manufacturing, electron microscopy, electron backscatter diffraction, long-term creep
About us
We evaluate creep property of heat resistant materials and clarify degradation and damage mechanism during creep exposure. We try to propose evaluation method of creep strength, life assessment method and new concept of material design. In order to improve code and standard of power plants, long-term creep strength and microstructure of crept specimens are evaluated based on NIMS Creep Data Sheets.
For thermal power plants, reliability of components under cyclic loading is needed because the use of renewable energy is increasing. We evaluate long-term creep property under cyclic loading for main heat resistant materials. For nuclear power plants, research and standardization of additively manufactured materials are active in the world. We evaluate long-term creep property of additively manufactured materials because the creep data of the materials are insufficient.
Specialized Research Field
- Evaluation of creep strength under cyclic loading and material degradation of high Cr steels
- Evaluation of long-term creep strength of additively manufactured high Cr steels and Nickel based alloys
- Degradation factor of carbon steels after 100,000h creep exposure
- Evaluation method of long-term creep strength and material improvement for austenitic heat resistant steels