<論文>腐食環境下のばね用材料の変動ねじり疲労における寿命評価と変形特性 : 3%食塩水中での影響

概要

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The varying torsional fatigue tests in 3% NaC1 solution were carried out by using Hard steel wires, Stain-less steel wires and Piano wires. And from the test results, the life assessment and the deformation behavior occured in the test piece during the fatigue tests were investigated experimentally. The main results obtained are surnmarized as follows : (1)The fatigue strength for spring materials is 3% NaC1 solution is much lower than that in air, when a small varying strain amplitude are loaded in the test piece. The rate of decrease in the fatigue strength is srnallest for Stainless steel wires, and is largest for Hard steel wires among spring materials of the three kinds. (2)From the torsioanl fatigue test results under the varying strain amplitude in air obtained by using the linear damage criterion is possible an estimate of the corrosion fatigue life. (3)The test results shows that there exists linear relationship between the varying plastic strain amplitude and the number of cycles to failure, the varying stress amplitude or hysteresis energy, when they are plot-ted on a log-log scale.
神戸市立工業高等専門学校の論文
1996-02-29