研究目的
Investigating the improvements of fatigue performances of S690QL steel welded by laser-induction hybrid welding (LIHW) method compared to single-laser welding (SLW).
研究成果
The LIHW method improved the fatigue performance of S690QL steel joints compared to SLW, with LIHW samples showing a ductile failure mode and better fatigue resistance. The study provides insights into the mechanisms of fatigue fracture and the benefits of LIHW for high-strength low alloy steels.
研究不足
The study focused on the fatigue behavior of S690QL steel welded by LIHW and SLW methods under specific conditions. The findings may not be directly applicable to other materials or welding conditions without further research.
1：Experimental Design and Method Selection:
The study compared the fatigue performances of S690QL steel welded by LIHW and SLW methods. Infrared imaging was used to obtain the weld thermal cycle, a fatigue machine tested the fatigue strength, and SEM observed the fracture morphology.
2：Sample Selection and Data Sources:
S690QL steel plates were cut into square plates for welding. Fatigue test samples were prepared with symmetry grooves to test the fatigue performances at weld centers.
3：List of Experimental Equipment and Materials:
YLR-4000 laser device, IRB-6400 robot, induction coil, work table, and work piece were used for welding. Fatigue tests were conducted with a fatigue machine, and SEM (FEI sirion-200) was used for fracture morphology observation.
4：Experimental Procedures and Operational Workflow:
Welding was performed under specified parameters. Fatigue tests were conducted with tension-tension fatigue loading and a stress ratio R =
5：Fracture morphologies were analyzed using SEM. Data Analysis Methods:
S-N curves were fitted to reflect the fatigue performances. Fracture morphologies were analyzed to understand the failure modes.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
