Recently the financial support by the Japanese Government to the basic research has been increasing, based on the formulation of the Basic Plan of Science and Technology. This tendency is evident in the field of metallic materials, too. The Ministry of International Trade and Industry (MITI) has initiated the "Super-Metal Project" in 1996, aiming at the functional improvement of steel, aluminium and other metals materials, while the National Research Institute of Metals, Science and Technology Agency (STA) has embarked on the STX21 Project to doubly increase the mechanical strength and the service life of steel materials for structural use. Together with minimised and optimised alloying, this goal will be realised by attempts to tailor the microstructure in nano-scale and fabricate the assembled structure in pre-service scale. The STX21 Project involves the R & D of advanced ferritic heat resistant steels for application to large diameter and thick section boiler components in coal-fired ultra-supercritical (USC) power plants at 650°C and 350 atmospheric pressure. The R & D are focusing on the improvement of oxidation resistance as well as long-term creep rupture strength for base materials and on the improvement of Type IV cracking strength loss in heat affected zone for welded joints.The Ministry of Education (MOE) has also begun the basic research with the next generation process projects, having run already eight projects for basic research on composite materials and materials combination.
The research projects mentioned in the above are all closely related to the non-destructive examination (NDE). The STX21 project concerns various means of non-destructive evaluation for welded parts, and the development of smart materials means the development of new methods of non-destructive evaluation. The latter project includes an attempt to embed acoustic emission sensors in materials.
Besides, the present status of non-destructive evaluation for improving the reliability in the field of nuclear energy application in Japan will be described.