THE FATIGUE LIMIT ESTIMATION METHODS FOR ALLOY STEELS AND ALUMINUM ALLOYS
合金钢与铝合金疲劳极限的理论估算方法分析

Based on the mechanical properties of twenty- seven alloy steels and aluminum alloys, the theoretical fatigue limits are analyzed with three methods. It is found that in the three methods only two can give a proper estimate of the fatigue limits. Moreover, when the relationship among the strength coefficient, the strain- hardening exponent and the mechanical properties is considered, the two methods can be used to estimate the fatigue limits from the conventional mechanical estimation may be lifted. properties. The limitation of high strength steel in the