Fig.1 shows the OM macrostructure of transverse section of welded joint by plasma arc in-situ weld-alloying welding on SiCp/6061Al MMC with Ti-60Al alloy sheet filler. No pores, fissures and incomplete fusion of filler are observed in the central zone of weld, and the structure is dense and transits naturally nearby the weld junction, showing that the fluidity of molten pool is improved greatly by the Ti-60Al alloy. Remarkably, high-quality weld in favor of improving the mechanical properties of welded joint is produced by plasma arc in-situ weld-alloying welding with Ti-60Al alloy sheet filler.
Fig.1 OM macrostructure of welded joint with Ti-60Al alloy sheet filler
The SEM image of welded joint by in-situ welding/ plasma arc welding on SiCp/6061Al MMC with Ti-40Al alloy sheet filler is shown in Fig.2. Figs.2(a), (b) and (c) show the centre of weld, the bottom of weld and the fusion zone, respectively.
Fig.2 Weld microstructures of welded joint with Ti-60Al alloy sheet filler: (a) In centre of weld; (b) At bottom of weld; (c) In fusion zone
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