POROSITY STATISTICS AND FATIGUE STRENGTH OF SINTERED IRON.

The article discusses the relationship between large pores and fatigue strength of sintered iron and steel. According to Y. Murakami, E. J. Gumbel's statistics of extremes can be applied to structural defects and inclusions. By considering large pores as structural defects, the article attempts to interpret Murakami's ideas for porous sintered steels. The article notes that the correlation between fatigue strength and pore dimensions should be the yield of evaluating the largest pores quantitatively. It explains the evaluation of the specimens by quantitative image analysis of the porosity in the waist section of the samples where fracture occurred.