Effect of alloy elements added on microstructure and hardening of Al/SiC laser clad coatings

Riquelme, Ainhoa; Escalera-Rodriguez, María Dolores; Rodrigo, P.; Otero, E.; Rams, J.

doi:10.1016/j.jallcom.2017.08.153

Cited by 38 publications

(21 citation statements)

References 33 publications

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“…In the Al40Si/SiC coating (Figure 2b), the SiC particles were not degraded and there was no presence of Al 4 C 3 . However, primary Si particles were observed [20]. These particles were formed because of the addition of Si as alloying element and not by the formation of Si because of the degradation of the SiC p .…”

Section: Coatings Microstructurementioning

confidence: 96%

“…In addition, Ti reacts with the Si and forms TiSi 2 . [20]. The presence of these products in the composite matrix decreases the amount of the initial reinforcement, causing that in some cases, only a ring of TiC remains in the surroundings of a zone where a SiC particle existed is observed.…”

Section: Coatings Microstructurementioning

confidence: 99%

“…In previous research, laser cladding with Al/SiC p on aluminum alloys were successfully carried out [18,19], and the effect of the addition of other alloying elements (silicon and titanium) to the matrix of the composite coating was investigated [20]. The addition of silicon into the Al matrix displaces the reaction between Al and SiC p to the products, inhibiting the aluminum carbide formation [21][22][23] and, therefore, reducing the degradation of the silicon carbide particles.…”

Section: Introductionmentioning

confidence: 99%

“…For the cladding processes, it is needed the addition of at least 40 wt.% Si in the Al/SiC p composite matrix to inhibit the Al 4 C 3 formation. The microstructure of this coating consists in an Al-Si hypereutectic matrix reinforced with undegraded SiC particles [20]. Also, the addition of 20 wt.% Ti avoided the presence of Al 4 C 3 in the composite matrix.…”

Section: Introductionmentioning

confidence: 99%

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Corrosion Resistance of Al/SiC Laser Cladding Coatings on AA6082

Riquelme¹,

Rodrigo²,

Escalera-Rodriguez³

et al. 2020

Coatings

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Aluminum matrix composites reinforced with silicon carbide particles (SiCp) were deposited by laser cladding on AA6082 aluminum alloy. Different compositions of the matrix of the composites coating were used and different amounts of Si and Ti were added to a base of Al-12Si in order to control the reactivity between molten aluminum and SiCp during laser cladding. The corrosion behavior of the coatings deposited was evaluated in 3.5 wt.% NaCl solution using gravimetric analyses and electrochemical polarization tests. The corrosion products observed were Al(OH)3 and Al2O3, and they formed a layer that limited the evolution of corrosion. However, the presence of discontinuities in it reduced the corrosion resistance of the coating. The corrosion mechanisms were different depending on the coating composition. The addiction of Ti to the alloy allowed for better corrosion behavior for the composite coating than that of the aluminum substrate.

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Section: Coatings Microstructurementioning

confidence: 96%

Section: Coatings Microstructurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Corrosion Resistance of Al/SiC Laser Cladding Coatings on AA6082

Riquelme¹,

Rodrigo²,

Escalera-Rodriguez³

et al. 2020

Coatings

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“…Nowadays there is an intensive experimental investigation of metal-matrix composites and coatings (MMC) fabricated by different deposition techniques, for instance, selective laser melting [1] and solid-state sintering [2]. The composite materials possess strongly inhomogeneous microstructure, with the irregular interfaces being observed (Fig.…”

Section: Introductionmentioning

confidence: 99%

Computational analysis of deformation and fracture in composite materials and coatings

et al. 2019

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Deformation and fracture of metal-ceramic composites and coatings under quasistatic tension, compression, shear, and during cooling from the melt to room temperatures are numerically investigated. Dynamic and quasistatic boundary-value problems are solved in twoand three-dimensional formulations by the finite-difference and finite-element methods. Constitutive models include the isotropic hardening of aluminum and fracture of ceramic particles. Composite microstructure is taken into account explicitly. Analysis of the fracture in composites is carried out, with the residual stresses being not taken into consideration. Origination of cracks in the near-interface regions of bulk tension and their propagation in ceramic particles are investigated. Residual stresses formed during cooling of the composites are calculated for different volume fractions of particles.

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