Influence of Rest in Stress Alternation on the Fatigue Properties of a Low Carbon Steel at Elevated Temperatures
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概要
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Experiments were carried out with a low carbon steel to study the influence of rest in stress alternation on the fatigue properties of a low carbon steel at elevated temperatures. The test temperatures were 450 and 300℃ and the frequency of alternating stress was 1500 c.p.m. The tests were performed under the condition of constant strain amplitude in the rotating bending fatigue test. The rest in stress alternation was realized according to two sorts of programs. In the one, a rest of 0.5〜30 hours was given after the stress alternation of one half of the number of cycles to fracture, and in the other, rests of about 8 and 16 hours were given alternately after the stress alternation of every one fifth or one tenth of the number of cycles to fracture. The temperature during the rest was maintained at the test temperature. As a result, it was found that the influence of rest on the fatigue strength of a low carbon steel was little and the distribution of hardness through the cross section of specimen showed little difference between the two cases with and without rest.
- 一般社団法人日本機械学会の論文
著者
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Murakami Yasunori
Faculty Of Junior College Of Automobile Industry Osaka Sangyo University
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TAIRA Shuji
Faculty of Engineering, Kyoto University.
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Taira Shuji
Faculty Of Engineering Kyoto University
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KOTERAZAWA Ryoichi
Faculty of Engineering, Kyoto University.
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Koterazawa Ryoichi
Faculty Of Engineering Kyoto University
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