Abstract Post-weld treatments can enhance the fatigue strength of weldments by means of improving their geometry or residual stresses, or both. In this study, the fatigue strength of TIG-dressed non-load-carrying cruciform joints made of ultra-high-strength steel were analyzed using stress-based approaches, i.e. nominal, structural, and effective notch stress (ENS) methods, and a multi-parametric approach, entitled the 4R method. Comparisons were made between the methods, along with the applied parameters, and the results showed the 4R and ENS approaches to have the best correspondence with the experimental test data, whereas the nominal and structural stress methods resulted in conservative fatigue strength estimations.

中文翻译：

---

4R法TIG修整超高强钢角焊缝疲劳强度评估

摘要 焊后处理可以通过改善焊件的几何形状或残余应力，或两者兼而有之，提高焊件的疲劳强度。在这项研究中，使用基于应力的方法，即名义、结构和有效缺口应力 (ENS) 方法，分析了由超高强度钢制成的 TIG 修整非承载十字形接头的疲劳强度，以及多参数方法，称为 4R 方法。对这些方法以及应用参数进行了比较，结果表明 4R 和 ENS 方法与实验测试数据具有最佳对应关系，而名义和结构应力方法导致保守的疲劳强度估计。