Micromechanical properties and sliding wear behaviour of HVOF-sprayed Fe-based alloy coatings

Bolelli, Giovanni; Bonferroni, Benedetta; Laurila, Jussi; Lusvarghi, Luca; Milanti, Andrea; Niemi, Kari; Vuoristo, Petri

doi:10.1016/j.wear.2011.12.001

Cited by 124 publications

(54 citation statements)

References 66 publications

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“…The larger particle size distribution compared to that of Fe-Ni-Cr-Mo-B-C resulted in a less homogeneous microstructure with molten and unmolten particles with different mechanical properties. In fact, the rapid quenching of a molten particle and its solidification in a metastable state may result in greater hardness due to strengthening by solid solution as reported in another study [10]. Since nano-hardness was achieved by indentation at low penetration depth (300 nm) within the particle, it mainly reflects the intralamellar properties of the sprayed coating [29].…”

Section: Microstructural and Mechanical Characterization Of Coatingsmentioning

confidence: 79%

“…The satisfactory combination of high mechanical and chemical properties, the low cost, the low environmental impact together with the health and safety make these coatings a reliable future candidate in replacing conventional thermal sprayed coatings. Excellent anti-wear and corrosion properties of Fe-based coatings were achieved by several authors [7][8][9][10]. Moreover the development of alloy compositions with high Glass Forming Ability (GFA) combined with high kinetic spraying process such as HVOF allowed for deposition of amorphous Fe-based coatings with outstanding wear resistance and corrosion properties [11,12].…”

Section: Introductionmentioning

confidence: 99%

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Microstructural Characteristics and Tribological Behavior of HVOF-Sprayed Novel Fe-Based Alloy Coatings

et al. 2014

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Thermally-sprayed Fe-based coatings have shown their potential for use in wear applications due to their good tribological properties. In addition, these kinds of coatings have other advantages, e.g., cost efficiency and positive environmental aspects. In this study, the microstructural details and tribological performances of Fe-based coatings (Fe-Cr-Ni-B-C and Fe-Cr-Ni-B-Mo-C) manufactured by High Velocity Oxygen Fuel (HVOF) thermal spray process are evaluated. Traditional Ni-based (Ni-Cr-Fe-Si-B-C) and hard-metal (WC-CoCr) coatings were chosen as references. Microstructural investigation (field-emission scanning electron microscope FESEM and X-Ray diffractometry XRD) reveals a high density and low oxide content for HVOF Fe-based coatings. Particle melting and rapid solidification resulted in a metastable austenitic phase with precipitates of mixed carbides and borides of chromium and iron which lead to remarkably high nanohardness. Tribological performances were evaluated by means of the ball on-disk dry sliding wear test, the rubber-wheel dry particle abrasion test, and the cavitation erosion wear test. A higher wear resistance validates Fe-based coatings as a future alternative to the more expensive and less environmentally friendly Ni-based alloys.

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Section: Microstructural and Mechanical Characterization Of Coatingsmentioning

confidence: 79%

Section: Introductionmentioning

confidence: 99%

Microstructural Characteristics and Tribological Behavior of HVOF-Sprayed Novel Fe-Based Alloy Coatings

et al. 2014

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“…Due to the developments of BMG systems with great glass forming ability (GFA) and spraying technology, fabricating Fe-based amorphous coatings has now become available, which can effectively expand the application domain of Fe-based amorphous alloys. Amorphous alloy coatings avoid the drawback of the brittleness of Fe-based BMGs, and at the same time maintain their excellent mechanical and chemical performances [9,10]. Notably, Fe-based amorphous coatings have already exhibited higher hardness and better corrosion resistance than electroplated Cr and 304 stainless steel in an NaCl solution, demonstrating their great potential in applications on sail cover plates, ship hulls, decks of aircraft carriers, and other items that contact with sea water [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Investigating the Wear Behavior of Fe-Based Amorphous Coatings under Nanoscratch Tests

Luo

Jiao

et al. 2017

Metals

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Abstract:The wear behavior of two coatings (Fe 49.7 Cr 18 Mn 1.9 Mo 7.4 W 1.6 B 15.2 C 3.8 Si 2.4 and Fe 40 Cr 23 Mo 14 C 15 B 6 Y 2 ) sprayed by high-velocity air fuel technology was investigated through nanoscratch tests under ramping loads. Compared with the substrate, the Fe-based amorphous coatings exhibit lower penetration depth, higher elastic recovery, and lower wear volume, indicating the excellent wear resistance of the coatings. This behavior is related to the high hardness and high hardness/elastic modulus ratio (H/E) of the Fe-based amorphous coatings. From the scanning electron microscopy images of the scratch grooves, it is found out that ploughing governs the wear behavior of the coatings and substrate. In addition, spalling wear easily occurs in the pore regions of the coatings.

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“…The levels defined in this experiment are based on the values recommended by manufacturers [17], as well as articles where similar alloys deposited by HVOF were studied [18][19][20][21][22][23][24][25][26][27]. Table 2 shows the L9 orthogonal array with the factors and levels used in this article.…”

Section: Methodsmentioning

confidence: 99%

Optimization of the Deposition Parameters of HVOF FeMnCrSi+Ni+B Thermally Sprayed Coatings

et al. 2015

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HVOF thermal spray process produces coatings with low porosity and low oxide content, as well as high substrate adhesion. Small variations on the parameters of the HVOF process can generate coatings with different characteristics and properties, which also is chemical composition depended of the alloy. FeMnCrSi alloy is a cavitation resistant class of material with a great potential for HVOF deposition use. The main goal of this article is to study the influence of some HVOF parameters deposition, as standoff distance, powder feed rate and carrier gas pressure on three different alloys. FeMnCrSi experimental alloys with some variations in nickel and boron content were studied. Taguchi experimental design with L9 orthogonal array was used in this work. Porosity, oxide content, tensile adhesion strength and microhardness of the coatings were evaluated. The results indicated that all factors have significant influence on these properties. Chemical composition of the alloys was the most important factor, followed by the carrier gas pressure, standoff distance and powder feed rate. The addition of Ni, produces coatings with lower levels of oxide content and porosity. An experiment with improved parameters was conducted, and a great improvement on the coating properties was observed.

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Micromechanical properties and sliding wear behaviour of HVOF-sprayed Fe-based alloy coatings

Cited by 124 publications

References 66 publications

Microstructural Characteristics and Tribological Behavior of HVOF-Sprayed Novel Fe-Based Alloy Coatings

Microstructural Characteristics and Tribological Behavior of HVOF-Sprayed Novel Fe-Based Alloy Coatings

Investigating the Wear Behavior of Fe-Based Amorphous Coatings under Nanoscratch Tests

Optimization of the Deposition Parameters of HVOF FeMnCrSi+Ni+B Thermally Sprayed Coatings

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