An increase of testing frequency to reduce the testing time could affect the fatigue behavior of metallic materials. The current paper investigates the effect of testing frequency on the high and very high cycle fatigue behavior of AA2024, Ti-6Al-4V, and Inconel 718 alloys tested at 20, 90, and 1000 Hz. To quantify the effect of testing frequency a two-parameter Weibull distribution and Basquin’s equation were utilized as well as the threshold stress intensity factor range was determined. Fatigue crack initiation sites were evaluated on the fracture surface with respect to different testing frequencies. The results showed that changes in the testing frequency significantly influence the mechanical response of the Ti-6Al-4V alloy, while no substantial impact on the fatigue properties of AA2024 and Inconel 718 alloys was identified. The findings of the study contribute to a more complete knowledge of the frequency sensitivity of the alloys and provide valuable insights for the design and evaluation of materials used in high-frequency applications.

增加测试频率以减少测试时间可能会影响金属材料的疲劳行为。当前论文研究了测试频率对在 20、90 和 1000 Hz 下测试的 AA2024、Ti-6Al-4V 和 Inconel 718 合金的高周和超高周疲劳行为的影响。为了量化测试频率的影响，使用了双参数 Weibull 分布和 Basquin 方程，并确定了阈值应力强度因子范围。就不同的测试频率而言，在断裂表面上评估疲劳裂纹萌生部位。结果表明，测试频率的变化显着影响 Ti-6Al-4V 合金的机械响应，而对 AA2024 和 Inconel 718 合金的疲劳性能没有实质性影响。