Abstract The International Institute of Welding published IIW-recommendations for the HFMI-treatment, which covers fatigue assessment procedures and quality assurances guidelines. This paper contributes to the validation of the detrimental effect of high R-ratios on HFMI-treated cover plate specimens made of high-strength steel S700. Applying the nominal stress approach, the recommended S/N-curves agree well to the experiments in both cases, R = 0.1 and R = 0.5. In case of the effective notch stress approach, only for R = 0.1 a sound agreement is observed, whereas for R = 0.5 a more pronounced reduction of the fatigue strength may be considered within the recommendations to ensure an overall conservative assessment.

中文翻译：

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载荷应力比对HFMI处理高强钢盖板名义和有效缺口疲劳强度评估的影响

摘要 国际焊接学会发布了针对 HFMI 治疗的 IIW 建议，其中涵盖了疲劳评估程序和质量保证指南。本文有助于验证高 R 比对由高强度钢 S700 制成的经 HFMI 处理的盖板试样的不利影响。应用名义应力方法，推荐的 S/N 曲线与两种情况下的实验非常吻合，R = 0.1 和 R = 0.5。在有效缺口应力方法的情况下，仅当 R = 0.1 时观察到良好的一致性，而当 R = 0.5 时，可以在建议中考虑更显着的疲劳强度降低，以确保整体保守评估。