研究目的
Investigating the effects of a brass interlayer on the cross-sectioned macrostructure and mechanical properties of laser offset welded joints between 5052 aluminum and press-hardened steel.
研究成果
The study successfully demonstrated that varying the thickness of the brass interlayer significantly affects the microstructure and mechanical properties of laser offset welded joints between 5052 aluminum and press-hardened steel. The optimal interlayer thickness was found to be 0.05 mm, achieving the highest tensile strength. The presence of brittle Fe2Al5 phase was identified as a key factor deteriorating mechanical properties. Future studies could explore other interlayer materials or welding parameters to further optimize joint performance.
研究不足
The study is limited by the specific materials and welding parameters used. The effects of other interlayer materials or varying welding parameters were not explored. Additionally, the rapid cooling rate and limited heat input may affect the completeness of the solution and diffusion of the brass interlayer.
1：Experimental Design and Method Selection:
Laser offset welding was employed to join 5052 aluminum to press-hardened steel with a brass interlayer. The study varied the thickness of the brass interlayer to observe its effects on the joint's microstructure and mechanical properties.
2：Sample Selection and Data Sources:
Base materials were 5052 aluminum alloy and press-hardened steel with brass interlayers of 0.05 mm and 0.1 mm thicknesses.
3：05 mm and 1 mm thicknesses.
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: Equipment included a fiber laser welding system, SEM (TESCAN MIRA3), EDS, micro-XRD (Rigaku Rapid IIR), and a nanoindenter (Agilent Nano Indenter G200).
4：0).
Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The welding process involved focusing the laser beam on the steel surface, with parameters set to a power of 1.2 kW, wavelength of 1070 nm, and welding speed of 12 mm/s. Post-welding, specimens were prepared for tensile testing and microstructure examination.
5：2 kW, wavelength of 1070 nm, and welding speed of 12 mm/s. Post-welding, specimens were prepared for tensile testing and microstructure examination.
Data Analysis Methods:
5. Data Analysis Methods: The microstructure was analyzed using SEM, EDS, and micro-XRD. Nanoindentation tests were performed to measure hardness values of different phases.
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