引張繰り繰返曲げ組合せ応力の下における高温疲労に関する研究

概要

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Fatigue strength of 13%Cr-steel at elevated temperature was studied by using the newly made high temperature fatigue testing machine, which was specially designed for testing turbine blades under service condition, such as under the combined stresses of static tension and repeated bending. Particular attention was given to the influence of static tension on the fatigue strength of the material at elevated temperature under repeated bending stress. Testing temperature was 450℃. The results obtained from this study were as follows ; 1) The S-N curves made by taking the maximum stress on the stress axis show that the S-N curves for the tests with the higher static tensile stress lie on the side of the higher fatigue strength. 2) As far as the static tension applied is small the condition of the fatigue is affected mainly by the magnitude of the repeated bending stress and for the fatigue test under the higher combined static tension the fracture is destined chiefly by the magnitude of that tensile stress.
社団法人日本材料学会の論文
1956-08-15