Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5463729 | Materials Letters | 2017 | 4 Pages |
Abstract
The axial fatigue tests at room temperature for smooth specimens with theoretical stress concentration factor, Kt=1 and notched specimens Kt=2, 3 and 5 were performed in a high-strength 40CrNi2Si2MoVA steel for different stress ratio, R, that is the ratio of minimum stress to maximum stress, of â1, 0.06 and 0.5, respectively. Fatigue strength/limit for 1Ã107 cycles were determined according to a stair-case method. The stress concentration sensitivity and mean stress sensitivity are characterized by q factor and M factor, respectively. Moreover, a new model for evaluate the mean stress effects of high-strength steels was proposed, which is different from Goodman relation and Gerber parabola.
Related Topics
Physical Sciences and Engineering
Materials Science
Nanotechnology
Authors
Yukui Gao,