Aging constants for efficient fracture toughness prediction of thermally aged GTAW/SMAW of 316L stainless steel. (June 2022)

• Record Type: Journal Article
• Authors: Kim, Young-Joon; Youn, Gyo-Geun; Hwang, Jin-Ha; Kim, Yun-Jae; Miura, Yasufumi
• Is Part Of: International journal of pressure vessels and piping. Volume 197(2022)
• Publication Date: 2022-06
• Subjects: GTAW and SMAW 316L stainless Steel welds -- Fracture toughness prediction -- Thermal aging constant -- Thermal embrittlement; Pressure vessels -- Periodicals; Pipe -- Periodicals; Récipients sous pression -- Périodiques; Tuyaux -- Périodiques; Pipe; Pressure vessels; Periodicals; 681.76041
• DOI: 10.1016/j.ijpvp.2022.104632
• Languages: English
• ISSNs: 0308-0161

Abstract

Abstract: This paper presents closed-form expressions of the thermal aging constant to predict fracture toughness of thermally aged SMAW and GTAW 316 L stainless steels. Based on the data thermally aged at 350 °C up to 15, 000 h and at 400 °C up to 8, 000 h; and tested at room and operating temperatures (288 °C), closed-form approximations are given in terms of the aging time and temperature using an exponential function. Comparison of the predicted toughness with experimental data shows that the thermal aging time and temperature effects on toughness reduction can be predicted, although there exists quite scattering in experimental toughness data of weldment. Highlights: Closed-form expressions of the thermal aging constant for fracture toughness prediction of thermally aged stainless welds SMAW and GTAW 316 L stainless steels thermally aged at 350 °C up to 15, 000 h and at 400 °C up to 8, 000 h. Fracture toughness of thermally aged stainless welds at room and operating temperatures. Finite element simulation based on the multiaxial fracture strain damage model Overall good agreements between predicted fracture toughness results and test data for all thermal aging types.