Abstract
In this study, a criterion for optimizing the fatigue strength of metallic materials is proposed, and verified by many experimental results. The strategy for optimizing the fatigue strength is to continuously increase the ultimate tensile strength (UTS) under the condition of keeping certain work-hardening abilities. It is found that the relationship between the true UTS and true uniform elongation can be described by two straight lines, and the optimal fatigue strength can be obtained at the point where the two straight lines intersect with each other. This study has great guiding significance for economizing time and money to optimize the fatigue strength of metallic materials.
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