Laser powder-bed fusion of Mo(Si,Al)2 – Based composite for elevated temperature applications

Minasyan, Tatevik; Ivanov, Roman; Toyserkani, Ehsan; Hussainova, Irina

doi:10.1016/j.jallcom.2021.161034

Cited by 8 publications

(4 citation statements)

References 31 publications

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Section: Spectrummentioning

confidence: 87%

“…Another finding was that irregularly shaped IMCs were found in the α-Al regions which contained up to ~7 at.% Mo and <1 at% of impurities such as Fe, Ti, Mn, Mg (Table 4, spectrums 8, 9). The concentration of Mg in the α-Al regions is at the level of 0.3 at.% (Table 4, spectrums 11,12). According to the TEM data there are also precipitates such as Al 18 Mg 3 Mo 2 and as well as the grain boundary precipitates containing up to 11-15 at.% Fe (Figure 9f,h For samples obtained with Mo loads of 0.9 and 1.2 g/layer, it becomes observable the volume content of Mo-rich particles is reduced (Figures 10 and 11) with simultan increasing of the areas occupied by Al-Mo IMCs (Figures 10d and 11c,e).…”

Section: Spectrummentioning

confidence: 99%

“…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%

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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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Section: Spectrummentioning

confidence: 87%

Section: Spectrummentioning

confidence: 99%

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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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“…Among the most advanced AM technologies available, laser powder-bed fusion has gained increased attention in both the industrial and academic sectors. The essence of the process lies beneath the selective melting/solidification of the desired sections of consecutive powder layers by a precise (computer-controlled) high-energy laser beam directed by 3D CAD (computer-aided design) file [ 16 , 17 , 18 ]. Within the scanning process, the laser energy is supplied into the powder layer, and the powder particles–laser beam interaction takes place over a very short duration resulting in high heating/cooling rates [ 19 , 20 , 21 ].…”

Section: Introductionmentioning

confidence: 99%

Laser Powder-Bed Fusion of Ceramic Particulate Reinforced Aluminum Alloys: A Review

Minasyan

Hussainova

2022

Materials

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Aluminum (Al) and its alloys are the second most used materials spanning industrial applications in automotive, aircraft and aerospace industries. To comply with the industrial demand for high-performance aluminum alloys with superb mechanical properties, one promising approach is reinforcement with ceramic particulates. Laser powder-bed fusion (LPBF) of Al alloy powders provides vast freedom in design and allows fabrication of aluminum matrix composites with significant grain refinement and textureless microstructure. This review paper evaluates the trends in in situ and ex situ reinforcement of aluminum alloys by ceramic particulates, while analyzing their effect on the material properties and process parameters. The current research efforts are mainly directed toward additives for grain refinement to improve the mechanical performance of the printed parts. Reinforcing additives has been demonstrated as a promising perspective for the industrialization of Al-based composites produced via laser powder-bed fusion technique. In this review, attention is mainly paid to borides (TiB2, LaB6, CaB6), carbides (TiC, SiC), nitrides (TiN, Si3N4, BN, AlN), hybrid additives and their effect on the densification, grain refinement and mechanical behavior of the LPBF-produced composites.

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Performance analysis of Mo(Si, Al)2 solid solutions based on valence electron structure

Hou

et al. 2022

Journal of Alloys and Compounds

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Laser powder-bed fusion of Mo(Si,Al)2 – Based composite for elevated temperature applications

Cited by 8 publications

References 31 publications

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

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

Laser Powder-Bed Fusion of Ceramic Particulate Reinforced Aluminum Alloys: A Review

Performance analysis of Mo(Si, Al)2 solid solutions based on valence electron structure

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