کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
800568 | 1467538 | 2008 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Prediction of very high cycle fatigue failure for high strength steels, based on the inclusion geometrical properties Prediction of very high cycle fatigue failure for high strength steels, based on the inclusion geometrical properties](/preview/png/800568.png)
This article deals with the experimental and predicted fatigue endurance of the high strength steels, European 100C6 (martensitic and bainitic) and the Japanese SUJ2 in the gigacycle regime. Tests were carried out with stress ratio R = −1 in tension–compression condition at room temperature. To attain the high number of cycles required in a reasonable period of time, an ultrasonic test machine working at 20 KHz was used to obtaining 1.7 × 109 cycles in approximately 24 h. The relationship between the geometrical properties of inclusions associated with fatigue failure and the fatigue life of these steels was studied. Thereafter, with basis on a simplified evaluation of the highest stress in the elliptical inclusion for fatigue Mode I, three models to predict the fatigue life for these high strength steels were proposed adjusting non-linear regression curves to the corresponding experimental results.
Journal: Mechanics of Materials - Volume 40, Issue 8, August 2008, Pages 636–640