Microstructure and sliding wear behaviour of Tribaloy T-800 coatings deposited by laser cladding

Navas, C.; Cadenas, M.; Cuetos, J.M.; Damborenea, J. de

doi:10.1016/j.wear.2005.04.020

Cited by 90 publications

(48 citation statements)

References 18 publications

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“…T-800 exhibits relatively good high temperature oxidation and corrosion resistances without severe degeneration of wear properties. The excellent performance in aggressive environments makes it a wear-resistant coating material for tip shrouds of turbine blades operated at high temperature [6,7].…”

Section: Introductionmentioning

confidence: 99%

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Oxidation Behavior of Tribaloy T-800 Alloy at 800 and 1,000 °C

et al. 2008

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The oxidation behavior of Co-based Tribaloy T-800 alloy has been studied isothermally in air at 800 and 1,000°C, respectively. The results showed that the oxidation mechanism was dependent on the exposure temperature. The oxidation of the alloy followed subparabolic oxidation kinetics at 800°C. The oxide scale at this temperature exhibited a multi-layered structure including an outer layer of Co oxide, a layer composed of complex oxide and spinel, a nonuniform Mo-rich oxide layer, an intermediate mixed oxides layer and an internal attacked layer with different protrusions into Laves phase. During 1,000°C exposure, it followed linear kinetics. The oxidation rendered a relatively uniform external Cr-rich oxide layer coupled with a thin layer of spinel on the top surface and voids at local scale/alloy interface and intergranular region together with internal Si oxide at 1,000°C.

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Section: Introductionmentioning

confidence: 99%

“…Much attention has been paid to the wear resistance of Tribaloy alloys [2,7,8]. However, relatively few reports on the reaction mechanisms of T-800 oxidized at high temperatures are available.…”

Section: Introductionmentioning

confidence: 99%

Oxidation Behavior of Tribaloy T-800 Alloy at 800 and 1,000 °C

et al. 2008

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“…Their particular close-packed structure hinders dislocation movement [4], making them very hard, but also rather brittle [4][5][6]. Therefore, Tribaloys are seldom employed in bulk form, but rather applied as wear resistant coatings [7][8][9][10][11]. Since purely metallic Laves phases are less hard than carbides [5,11], Tribaloy coatings are often reported to display lower wear resistance than carbide-containing coatings, like thermally sprayed or clad cermets [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, in literature, much more knowledge exists on the characteristics of welded or laser-clad Tribaloys [7][8][9] than thermally sprayed ones [10,11], and HVOF-sprayed in particular [12,13,[15][16][17][18]. The microstructure of HVOF-sprayed Tribaloy coatings is significantly different from that of clad or welded ones, due to the peculiarities of HVOF-spraying.…”

Section: Introductionmentioning

confidence: 99%

“…Welded Tribaloys display a fully crystalline microstructure resulting from melt solidification. In the case of hyper-eutectic compositions, like Tribaloy-800 (Co-28 wt.%Mo-17 wt.%Cr-3 wt.%Si) and Tribaloy-700 (Ni-32 wt.%Mo-15 wt.%Cr-3 wt.%Si), primary Laves-phase dendrites are formed in an eutectic matrix comprising fine Laves-phase and Co-or Ni-based solid solution lamellar crystals [6][7][8]. In HVOF-sprayed Tribaloy coatings, first of all, the high velocity impact of heated particles generates a layered lamellar microstructure, like every thermally sprayed material.…”

Section: Introductionmentioning

confidence: 99%

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Microstructural and tribological comparison of HVOF-sprayed and post-treated M–Mo–Cr–Si (M=Co, Ni) alloy coatings

Bolelli¹,

Cannillo²,

Lusvarghi³

et al. 2007

Wear

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High velocity oxygen-fuel (HVOF)-sprayed wear resistant Co-28%Mo-17%Cr-3%Si and Ni-32%Mo-15%Cr-3%Si coatings, both as-sprayed and after heat treatments at 600• C for 1 h, have been studied. Particularly, their dry sliding wear behaviour has been compared by ball-on-disk tests against different counterbodies (100Cr6 steel and sintered alumina), and differences were discussed based on microstructural characteristics and micromechanical properties (Vickers microindentation and scratch test responses). As-sprayed coatings contain oxide stringers, are mostly amorphous and display rather low Vickers microhardness (about 7.4 GPa for the Co-based and 6.2 GPa for the Ni-based), toughness and elastic modulus. Heat-treated ones display sub-micrometric crystalline intermetallics, improving hardness (9.6 GPa and 7.4 GPa, respectively) and elastic modulus. Scratch tests indicate greater brittleness of the Ni-based alloy (higher tendency to cracking). Due to low hardness and toughness, both as-sprayed coatings undergo wear loss against steel and alumina counterparts. The more plastic Co-based alloy undergoes higher adhesive wear against steel and lower abrasive wear against alumina; the situation is reversed for the Ni-based alloy. After heat treatment, the wear loss against steel is very low for both coatings; abrasive wear still occurs against alumina.

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Wear of Tailored Forming Steels

et al. 2023

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This study investigates the wear behavior of additively welded cladding layers on less wear‐resistant base materials using plasma‐transferred arc welding and laser hot‐wire cladding. The cladding layers are made from atomized AISI 52100, AISI 5140, and a stainless steel with (0.52 wt% C, 0.9 wt% Si, 14 wt% Cr, 0.4 wt% Mo, 1.8 wt% Ni, 1.2 wt% V, bal. Fe) on unalloyed steel AISI 1022M as the base material. The specimens' microstructure and surface hardness are comparable with conventional specimens of monolithic AISI 52100 and AISI 4140, which is used as a reference. Tribometer tests are carried out in ball‐on‐disk configuration to investigate the wear resistance of the specimen. The multimaterial specimens show comparable wear behavior to their monolithic counterparts, and a good performance of the stainless specimen in pure sliding is proven. These findings suggest that additive manufacturing processes can be used to clad less wear‐resistant base materials and achieve high wear resistance, making it possible to exploit the advantages of surface coatings under severe wear conditions.

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Microstructure and sliding wear behaviour of Tribaloy T-800 coatings deposited by laser cladding

Cited by 90 publications

References 18 publications

Oxidation Behavior of Tribaloy T-800 Alloy at 800 and 1,000 °C

Oxidation Behavior of Tribaloy T-800 Alloy at 800 and 1,000 °C

Microstructural and tribological comparison of HVOF-sprayed and post-treated M–Mo–Cr–Si (M=Co, Ni) alloy coatings

Wear of Tailored Forming Steels

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