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Metals, Volume 7, Issue 8 (August 2017)
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Cover Story (view full-size image) Modern products and machines have to satisfy several needs like lightness, strength, durability, [...] Read more. Modern products and machines have to satisfy several needs like lightness, strength, durability, reuse. Multi-material design is the response to those needs and dissimilar joining is a major issue for the manufacturing industry. The laser technology is capable of producing dissimilar aluminum steel welds, although welding between Fe and Al alloys is difficult because of a significant difference in thermal properties and poor mutual solid-state solubility. The laser beam can be used alone in the off-set welding mode or coupled with the arc torch like in the hybrid welding mode. The success of welding depends on the composition and shape of the intermetallic compound layer, which forms between the two metals. Those compounds are brittle and are the week point of the joint. Laser off-set welding can produce a thin and regular intermetallic layer, which is desirable for a better weld.View this paper