Parallel laser melted tracks: Effects on the wear behaviour of plasma-sprayed Ni-based coatings

Felgueroso, D.; Vijande, R.; Cuetos, J.M.; Tucho, R.; Hernández, Alexander Franco

doi:10.1016/j.wear.2007.03.015

Cited by 19 publications

(10 citation statements)

References 15 publications

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“…In the region of 2Q = 40-50, there were also reflections attributable to other phases such as nickel-silicon boride Ni 6 Si 2 B, chromium or iron carbide (Cr, Fe) 23 C 6 , carbon-iron-silicon solid solution C-Fe-Si and chromium silicide Cr 3 Si. A comparison of related publications [19][20][21] shows that such a phase composition is typical for the NiCrSiBFe coating produced of powders with similar compositions.…”

Section: Resultsmentioning

confidence: 73%

“…Therefore, the chemical compositions listed in Table 2 for the C area, are the results of two phases -the solid solution (A) and the dark dispersive inclusions (C). Taking into account the increased nickel content and based on the XRD data (Figure 1) along with the results reported in references, [19][20][21] it was assumed that in the C area there are phases of Ni borides and/or silicides (such as the one obtained with XRD -Ni 6 Si 2 B) dispersed in the Ni-Cr-Fe solid solution. Other phases identified in the coating with the XRD analysis (such as iron borides or chromium silicides) are most likely also in the form of dispersive precipitates, which is typical for such compounds.…”

Section: Resultsmentioning

confidence: 87%

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Increasing the wear resistance of Al-Mg components using thermal-spray coatings

Lukauskaitė¹,

Černašėjus²,

Škamat³

et al. 2017

Mater. Tehnol.

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In the present work, plasma-spray technology was applied as a means to improve the durability of Al-Mg alloy parts. NiCrSiBFe coatings deposited on aluminium-magnesium alloy substrates with different thickness values were studied. Before spraying, the surfaces of aluminium-magnesium alloy were modified upon applying different surface pre-treatment methods. The phase composition, microstructure, microhardness, porosity and adhesion of the deposited coatings were characterized. Ball-on-plate wear tests of the NiCrSiBFe coatings were carried out in dry and lubricated conditions, using a scanning electron microscope to characterize the worn track and the wear mechanism. The correlation of the coating porosity and the adhesion strength with the thickness of a deposited layer was determined. The results revealed that the plasma-sprayed NiCrSiBFe coatings, compared with the uncoated Al-Mg substrate, provide both a stable friction coefficient and an improved wear resistance, which is about two times better under dry sliding and about five times better under lubricated sliding. Keywords: aluminium-magnesium substrate, NiCrSiBFe coatings, plasma spray, sliding wear, adhesion strength V prikazanem delu je bila za izbolj{anje trajnosti delov iz Al-Mg zlitin uporabljena tehnologija pr{enja s plazmo. Predmet preu~evanja so bile NiCrSiBFe prevleke nanesene na podlago iz aluminij-magnezijevih zlitin. Pred nana{anjem so bile povr{ine aluminij-magnezijevih zlitin obdelane z razli~nimi postopki predpriprave povr{in. Dolo~ene so bile fazna sestava, mikrostruktura, mikrotrdota, poroznost in oprijem napr{enih prevlek. Za dolo~itev sledi obrabe in mehanizma je bil na NiCrSiBFe prevlekah izveden preizkus s kroglico, v suhih in naoljenih pogojih, in bil karakteriziran s pomo~jo vrsti~nega elektronskega mikroskopa. Dolo~ena je povezava med poroznostjo in jakostjo oprijema ter debelino nane{enega sloja. Rezultati so pokazali, da plazemsko napr{ene NiCrSiBFe prevleke v primerjavi z Al-Mg zlitino brez prevlek, omogo~ajo stabilen koeficient trenja in izbolj{ujejo odpornost, ki je dvakrat bolj{a pri drsenju po suhi podlagi, in petkrat bolj{a pri drsenju po naoljeni podlagi.

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Section: Resultsmentioning

confidence: 73%

Section: Resultsmentioning

confidence: 87%

Increasing the wear resistance of Al-Mg components using thermal-spray coatings

Lukauskaitė¹,

Černašėjus²,

Škamat³

et al. 2017

Mater. Tehnol.

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“…El estudio del proceso de refusión con láser, la microestructura y las características del recubrimiento antes y después del proceso de refusión con láser, se estudiaron en un trabajo previo [13] .…”

Section: I In Nt Tr Ro Od Du Uc Cc Ci Ió óN Nunclassified

Desgaste lubricado de recubrimientos NiCrBSi refundidos parcialmente con láser

Vijande¹,

Cuetos²,

Cortizo³

et al. 2009

REVMETAL

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D De es s g g a as s t te e l l u ub b r r i i c c a ad do o d d e e r r e ec c u ub b r r i i m m i i e en n t to os s N Ni i C Cr r B BS Si i r r e ef fu u n nd di i d d o o s s p pa ar rc ci ia al lm me en nt te e c co on n l lá ás se er r ( (• •) ) R Re es su um me en n Los recubrimientos base níquel proyectados por plasma son ampliamente utilizados en la industria debido a su buen comportamiento a desgaste. La refusión por láser de estos recubrimientos elimina o disminuye fuertemente su porosidad, aumenta su microdureza y adherencia con el substrato. En este trabajo se define el "mallado láser" como la refusión parcial de la superficie de una capa y se aplica, para lograr unos mejores resultados antidesgaste a un recubrimiento NiCrBSi, combinando las ventajas de la proyección por plasma y de la refusión por láser. Los resultados se verifican experimentalmente y se cuantifican atendiendo a las variables porcentaje de superficie refundida y ángulo del "cordón de mallado" (huella de refusión de los sucesivos barridos paralelos del haz del láser). El proceso experimental se desarrolla siguiendo la metodología de diseño de experimentos, para optimizar tanto el proceso de ensayos como la función objetivo de mínimo desgaste en contacto lubricado. P Pa al la ab br ra as s c cl la av ve eRecubrimientos base níquel; Plasma; Refusión láser; Optimización desgaste lubricado.L Lu ub br ri ic ca at te ed d w we ea ar r o of f N Ni iC Cr rB BS Si i c co oa at ti in ng gs s p pa ar rt ti ia al ll ly y r re em me el lt te ed d w wi it th h l la as se er r A Ab bs st tr ra ac ct t Plasma sprayed nickel based coatings are widely used at the industry due to their good wear behaviour. The laser remelting of these coatings eliminates or strongly decreases their porosity and increases their microhardness and adherence with the substrate. In this work, we define the "laser meshing" as the partial refusion of the coating's surface. This technique is applied to a NiCrBSi coating in order to achieve better anti-wear outcomes, combining the advantages of plasma spraying and laser remelting. The results are experimentally verificated and they quantify themselves attending to the variables percentage of remelted surface and angle of "meshing cord" (remelting trace of successive parallel tracks by a laser beam). The experimental process is developed following the DOE methodology, to optimize both the test process and the objective function of minimum wear in lubricated contact. K Ke ey yw wo or rd ds sNickel based coatings; Plasma; Laser remelting; Lubricated wear optimization.

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“…Heat treatment is applied to improve the coating characteristics by following factors: an increase in the contact area of the coating and the substrate; reduction in material porosity; increase in the strength of interparticle bonds [7,8]. Laser treatment of sprayed coatings is one of the methods to improve coating properties [9][10][11][12]. Heat treatment of the sprayed coating can cause material cracking due to an increase the level of stresses during phase transformations.…”

Section: Introductionmentioning

confidence: 99%

Development of mathematical model of laser treatment heat processes using diffractive optical elements

Murzin¹,

Tisarev²,

Blokhin³

et al. 2017

Collection of Selected Papers of the III International Conference on Information Technology and Nanotechnology

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Calculation of laser beam intensity distribution in the focal plane of diffractive optical element was performed using software TracePro. To determine temperature fields occurring in the process of laser treatment of material, software of computational gas dynamics CFX version 15.0 and supercomputer "Sergey Korolev" were used. Temperature dependence of heat conductivity for the coating of the Ni-Al alloy produced by plasma spraying was determined. Alloy heat capacity was calculated based on additive rule. Besides, the temperature dependence of the absorption coefficient at CO 2 -laser treatment was also determined.

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Parallel laser melted tracks: Effects on the wear behaviour of plasma-sprayed Ni-based coatings

Cited by 19 publications

References 15 publications

Increasing the wear resistance of Al-Mg components using thermal-spray coatings

Increasing the wear resistance of Al-Mg components using thermal-spray coatings

Desgaste lubricado de recubrimientos NiCrBSi refundidos parcialmente con láser

Development of mathematical model of laser treatment heat processes using diffractive optical elements

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