Optimization and enhancement of friction stir welding strength on high yield strength deformed steel

Kumar, R.; Elango, V.; Giridharan, K.; Jothiprakash, V.M.; Stalin, B.

doi:10.1016/j.matpr.2020.09.149

Cited by 3 publications

(1 citation statement)

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“…During FSW of Al to steel, Zhou et al [5] totally plunged the pin into the Al plate in order to avoid tool wear and this produced a diffusion layer at the interface, rather than an intermetallic layer with enhanced atomic migration. Refractory alloys based on the tungsten-rhenium system [6] are widely adopted for steel processing; they consist of a ceramic solution based on polycrystalline cubic boron nitride (PCBN) [7] and Co-based alloy with the γ/γ' microstructure strengthened by precipitating intermetallics, Co 3 (Al, W), with an L l2 structure [8][9][10][11][12][13]. In particular, the wear of PCBN FSW tool was investigated experimentally and numerically by Almoussavi et al, who determined that the tool shoulder periphery and probe side bottom are the most vulnerable parts suffering from wear issues [14].…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Material Properties in FSW Dissimilar Aluminum-Steel Lap Joints

Mortello

Pedemonte

Contuzzi

et al. 2021

Metals

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The friction stir lap welding of AA5083 H111 aluminum alloy and S355J2 grade DH36 structural steel was investigated. A polycrystalline cubic boron nitride with tungsten and rhenium additives tool was used. According to visual inspection, radiographic examination, and tensile test, it was observed that the best results were obtained for rotation speeds of about 700–800 rpm, with a feed speed ranging between 1.3 and 1.9 mm/s. From the fatigue tests, it is possible to state that there was a preferential propagation of cracks in the part of the aluminum alloy base material. Furthermore, a different response to fatigue stress for samples extracted from the same weld at different positions was observed, which introduces an overall variability in weld behavior along the welding direction. The specimens obtained in the second part of the weld endured a larger number of cycles before reaching failure, which can be related to progressively varying thermal conditions, dissipation behavior, and better metal coupling as the tool travels along the welding line.

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