Electrochemical Behavior of Aluminum-Molybdenum Surface Composites Developed by Friction Stir Processing

Mahesh, V.P.; Joseph, Alphonsa; Arora, Amit

doi:10.1007/s11665-021-06050-2

Cited by 4 publications

(1 citation statement)

References 30 publications

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“…The processes used for synthesizing the Al x Mo y IMCs mainly are as follows: laser powder-bed fusion [12], hot dipping of Mo rods into a commercial Al-12 wt.% Si alloy melt [13], stir casting [14,15], reactive hot-pressing [16], magnetron sputtering [17], friction stir processing [18,19], etc.…”

Section: Introductionmentioning

confidence: 99%

Microstructural Evolution of AA5154 Layers Intermixed with Mo Powder during Electron Beam Wire-Feed Additive Manufacturing (EBAM)

Zykova

Чумаевский

Vorontsov

et al. 2022

Metals

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AA5154 aluminum alloy wall was built using EBAM where the wall’s top layers were alloyed by depositing and then remelting a Mo powder-bed with simultaneous transfer of aluminum alloy from the AA5154 wire. The powder-beds with different concentrations of Mo such as 0.3, 0.6, 0.9 and 1.2 g/layer were used to obtain composite AA5154/Mo samples. All samples were characterized by inhomogeneous structures composed of as-deposited AA5154 matrix with coarse unreacted Mo articles and intermetallic compounds (IMC) such as Al12Mo, Al5Mo, Al8Mo3, Al18Mg3Mo2 which formed in the vicinity of these Mo particles. The IMC content increased with the Mo powder-bed concentrations. The AA5154 matrix grains away from the Mo particles contained Al-Fe grain boundary precipitates. Mo-rich regions in the 0.3, 0.6, 0.9 and 1.2 g/layer Mo samples had maximum microhardness at the level of 2300, 2600, 11,500 and 9000 GPa, respectively. Sliding pin-on-steel disk test showed that wear of A5154/Mo composite reduced as compared to that of as-deposited AA5154 due to composite structure, higher microhardness as a well as tribooxidation of Al/Mo IMCs and generation of mechanically mixed layers containing low shear strength Mo8O23 and Al2(MoO4)3 oxides.

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