Abstract This paper presents thermal aging effect on fracture toughness properties of GTAW (gas tungsten arc welding) and SMAW (shielded metal arc welding) of 316L stainless steels, and investigates the applicability of the existing three thermal aging models for CASS (cast stainless steels). Thermal aging was carried out at 350 °C for up to 15,000h and at 400 °C up to 8,000h. After aging, tensile and fracture toughness tests using 0.5T C(T) specimens were carried out at room temperature and at 288 °C. Comparing with the predictions using three (ANL, French and H3T) thermal aging models for CASS show that the predictions can be very non-conservative at operating temperature, and thus that the existing thermal aging models for CASS cannot be applied to the welded stainless steels.

中文翻译：

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热老化对 316L 不锈钢 GTAW/SMAW 断裂韧性的影响：现有 CASS 模型的实验和适用性

摘要 本文介绍了热时效对 316L 不锈钢 GTAW（钨极气体保护焊）和 SMAW（保护金属电弧焊）断裂韧性性能的影响，并研究了现有三种热时效模型对 CASS（铸不锈钢）的适用性。 . 热老化在 350 °C 下进行长达 15,000 小时，在 400 °C 下进行长达 8,000 小时。时效后，使用 0.5TC(T) 试样在室温和 288 °C 下进行拉伸和断裂韧性测试。与使用三种（ANL、French 和 H3T）CASS 热老化模型的预测进行比较表明，该预测在工作温度下可能非常不保守，因此现有的 CASS 热老化模型不能应用于焊接不锈钢.