研究目的
To characterize the intermetallic phases formed during the laser welding of Al-Cu joints and identify the phases that lead to cracks in the weld seam.
研究成果
The study successfully identified the major intermetallic phases in Al-Cu laser welds and developed a method to identify crack-inducing phases based on optical micrographs. This method can optimize Al-Cu laser welding processes without the need for advanced characterization equipment.
研究不足
The presence of the δ phase cannot be distinguished by XRD due to the diffraction pattern similarity of δ and γ1. The interface between η2 and γ1 is tiny and hard to characterize.
1：Experimental Design and Method Selection
The study combines synchrotron trough-the-substrate microdiffraction with SEM/EDX and etched/non-etched optical micrographs to identify intermetallic phases.
2：Sample Selection and Data Sources
Al (Al 1050, 99.5 % Al) and Cu (Cu-OF, 99.99 % Cu) were used as materials. Samples were prepared as thin sections (50~100 microns) of the weld seams mounted on glass substrates.
3：List of Experimental Equipment and Materials
Trump TruDisk2000 laser, 2D-Scanner optic Trumpf PFO 20, ALBA Synchrotron MSPD microdiffraction endstation, Rayonix CCD detector, SEM/EDX for elemental composition analysis.
4：Experimental Procedures and Operational Workflow
Samples were welded in overlap configuration, prepared for microdiffraction, and analyzed using optical microscopy, SEM/EDX, and tts-μXRD.
5：Data Analysis Methods
Diffraction patterns were integrated with d2Dplot software, and an algorithm was developed for peak detection and indexation with R software.
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
