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- W4323647934 abstract "In order to tailor the microstructures and mechanical properties of laser welded Al-B 4 C composite, it is necessary to elucidate the chemical reactions between B 4 C reinforcement and Al matrix during laser welding process. In this study, 3 mm thick Al-30wt.% B 4 C plates were laser welded using different parameters. Then the microstructure, reaction products, tensile properties and fracture surface of welded joint were studied. The results show that the reaction products of the weld zone can be controlled by varying the welding energy input, but the full penetration welded joint requires high energy input (120 KJ/m in this paper). For the full penetration welded joint, all B 4 C particles and part Al matrix react to form irregularly particle-like AlB 2 C 2 and coarse needle-like Al 4 C 3 phases, the joint efficiency is 67%. The failure mechanism of AlB 12 C 2 is cleavage fracture, and the failure mechanism of Al 4 C 3 is interfacial decohesion and pull out. The interfacial decohesion between Al 4 C 3 and Al matrix results in crack initiation due to their weak bonding interface. The cracks propagate, connect and penetrate the brittle AlB 12 C 2 phase and eventually lead to brittle fracture of the joint." @default.
- W4323647934 created "2023-03-10" @default.
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- W4323647934 date "2023-01-01" @default.
- W4323647934 modified "2023-10-18" @default.
- W4323647934 title "Microstructural investigations on laser welded Al-30wt.% B<sub>4</sub>C composite" @default.
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- W4323647934 doi "https://doi.org/10.1051/metal/2023008" @default.
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