Tensile properties and fracture behavior of friction stir welded joints of Fe-32Mn-7Cr-1Mo-0.3N steel at cryogenic temperature |
| |
| Authors: | Yi-jun Li Rui-dong Fu Yan Li Yan Peng Hui-jie Liu |
| |
| Affiliation: | 1. State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China;2. State Key Lab of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150000, China;3. College of Mechanical Engineering, Yanshan University, Qinhuangdao, Hebei 066004, China |
| |
| Abstract: | This study investigates the cryogenic tensile properties and fracture behavior of fiction stir welded and post-weld heat-treated joints of 32Mn-7Cr-1Mo-0.3N steel. Cryogenic brittle fracture, which occurred in the as-welded joint, is related to the residual particles that contain tungsten in the joint band structure. Post-weld water toughening resulted in the cryogenic intergranular brittleness of the joint, which is related to the non-equilibrium segregation of solute atoms during the post-weld water toughening. Annealing at 550 °C for 30 min can effectively inhibit the cryogenic intergranular brittleness of the post-weld water-toughened joint. The yield strength, ultimate tensile strength, and uniform elongation of the annealed joint are approximately 95%, 87%, and 94% of the corresponding data of the base metal. |
| |
| Keywords: | High nitrogen steel Friction stir welding Post-weld heat treatment Tensile properties Fracture behavior Cryogenic |
| 本文献已被 CNKI ScienceDirect 等数据库收录！ |
|
