Effect of Cryogenic Temperature on Low-Cycle Fatigue Behavior of AISI 304L Welded Joint

Metals

Dongjin Oh¹  Sangwoo Song¹  Namkyu Kim¹  Myunghyun Kim² 

[1] Department of Joining Technology, Korea Institute of Materials Science, Changwon 51508, Korea;Department of Naval Architecture and Ocean Engineering, Pusan National University, Busan 46241, Korea;

关键词: low-cycle fatigue;    welded joint;    strain ratio;    thickness effect;    cryogenic temperature;   

DOI  :  10.3390/met8090657

来源: DOAJ

【 摘 要 】

The aim of this study is to investigate the low-cycle fatigue (LCF) properties of an AISI 304L welded joint based on experimental data. The influential parameters on the LCF such as the specimen thickness, strain ratio and cryogenic temperature were considered in this experimental study. In order to investigate the thickness effect on the LCF behavior, two types of specimens with thicknesses of 5 mm and 10 mm were used in an LCF test. In addition, the fatigue tests were conducted under strain control with three different strain ratios of R = −1, 0, and 0.5 at room and cryogenic temperatures. Based on the results obtained by this experimental study, no significant effect involved with the thickness and the strain ratio were observed. However, it was clearly observed that LCF performance at room temperature is lower than that at cryogenic temperature. Finally, an LCF design curve that can be used in design of the liquefied natural gas (LNG) applications is suggested.

【 授权许可】

Unknown