The research results were presented at the Japan Iron and Steel Association's autumn lecture meeting held at Nagoya Univ. A research group headed by a unit leader Saburo Matsuoka at NRIM's Frontier Structural Material Research Center has developed. It was demonstrated that fatigue strength could be doubled from the conventional 630MPa to 1,120MPa. By this, the practical utilization of super iron and steel material aimed by NRIM has come a step closer, and at the same time the research results are expected to be used for car parts and the like, resulting in contribution to reliability improvement and global environmental preservation.
White grains are carbides.