Microstructure, Microhardness, Corrosion Resistance and Chemical Composition of Mo, B and Mo-B Coatings Produced Using Laser Processing

Bartkowska, Aneta; Bartkowski, Dariusz; Popławski, M.; Piasecki, Adam; Przestacki, Damian; Miklaszewski, Andrzej

doi:10.3390/ma13153249

Cited by 12 publications

(13 citation statements)

References 27 publications

(52 reference statements)

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“…Rao and Das [3] improved the wear resistance of AA2024 alloy by reinforcing it with SiC particles. The improvement of microstructure, microhardness, corrosion, wear resistance, and chemical composition of Mo-B, B-Si coatings and heat treatment of metal materials was attempted in [4][5][6]. The formation of metallurgical bonding of added materials with aluminum substrate through laser played a significant role in proving surface properties such as microhardness, wear, and corrosion resistance [5,7].…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Al-CuMgMn Alloy Developed by Laser Beam Surface Modification for Wear Resistance

Tolcha

Jiru

Lemu

2021

Metals

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Laser surface alloying is one of the recent technologies used in the manufacturing sector for improving the surface properties of metals. Aluminum alloys are key materials in the manufacturing sector. This favors their high demand in many industries. In this study investigation, the surface alloying of pure aluminum was conducted using a CO2 laser. Four types of alloying powders were used with a 2:1:1 combination of copper, magnesium, and manganese. The hardness of the alloyed zones of Al-CuMgMn increased by 2 to 7 times at a 1.7 kW processing laser power. To assess the rate of wear for the alloyed samples, a modified Lancaster wear coefficient was considered. When the pin-on-disc wear test at 10 N and 20 N loads was analyzed with different sliding speeds, a reduction in wear by 30–50% appeared due to surface alloying. The result shows good insight into the wear behavior. In the same way, microstructure and surface morphology studies displayed a good metallurgical bonding without defects. In a statistical sense, the friction and wear behavior matched with an asperity-based model. The experimental results revealed that laser surface alloy has more wear resistance.

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Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Al-CuMgMn Alloy Developed by Laser Beam Surface Modification for Wear Resistance

Tolcha

Jiru

Lemu

2021

Metals

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“…Laser modification is also used for this purpose [ 16 , 17 , 18 ]. One of the currently popular techniques is laser heat treatment [ 6 , 8 , 9 ], where the base material is alloyed with metals or nonmetals, including carbon [ 19 ], boron [ 20 , 21 , 22 ], chromium [ 23 ], silicon [ 23 , 24 , 25 ], molybdenum [ 26 ], carbides [ 27 , 28 ], borides [ 27 ] or mixtures of various elements [ 25 , 26 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 ]. As a result of the laser alloying process, the chemical composition and microstructure are changed, hence changing the properties of the processed material.…”

Section: Introductionmentioning

confidence: 99%

“…A significant number of papers concern surface modification with only boron [ 16 , 17 , 18 , 21 , 22 , 26 , 35 ] or boron compounds such as oxides [ 21 ] or borides [ 27 ]. Therefore, it seems justified to raise the issue of modification by other chemical elements.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of Cr-B Coatings Produced on Vanadis® 6 Tool Steel Using Laser Processing

Bartkowska¹

2021

Materials

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The paper presents the results of a study of the microstructure, chemical composition, microhardness and corrosion resistance of Cr-B coatings produced on Vanadis 6 tool steel. In this study, chromium and boron were added to the steel surface using a laser alloying process. The main purpose of the study was to determine the impact of those chemical elements on surface properties. Chromium and boron as well as their mixtures were prepared in various proportions and then were applied on steel substrate in the form of precoat of 100 µm thickness. Depending on the type of precoat used and laser processing parameters, changes in microstructure and properties were observed. Coatings produced using precoat containing chromium and boron mixture were characterized by high microhardness (900 HV0.05–1300 HV0.005) while maintaining good corrosion resistance. It was also found that too low laser beam power contributed to the formation of cracks and porosity.

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“…Recently, methods using high-energy sources, such as lasers, have played an important role among surface modification methods [26][27][28][29][30][31][32][33][34][35][36][37][38][39]. The use of a laser beam allows the microstructure of the previously produced surface layer to be shaped, giving it new properties.…”

Section: Introductionmentioning

confidence: 99%

Microstructural and Mechanical Properties of B-Cr Coatings Formed on 145Cr6 Tool Steel by Laser Remelting of Diffusion Borochromized Layer Using Diode Laser

et al. 2021

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The paper presents study results focused on the microstructural, mechanical, and physicochemical properties of B-Cr coatings obtained by means of modification of diffusion borochromized layers by diode laser beam. The studies were conducted on 145Cr6 tool steel. Diffusion borochromized layers were produced at 950 °C in powder mixture containing boron carbides as a source of boron and ferrochrome as a source of chromium. In the next step these layers were remelted using laser beam. Powers: 600, 900, and 1200 W were used during these processes. The microstructure, microhardness, chemical composition, as well as wear and corrosion resistance of newly-formed B-Cr coatings were determined. As a result of laser beam interaction, the diffusion borochromized layer was mixed with the steel substrate. The study showed that too low laser beam power causes cracks in the newly formed B-Cr coating, and on the other hand, too higher laser beam power causes deep remelting resulting in the loss of microhardness. The reduced corrosion resistance in comparison with diffusion borochromized layers was caused by occurrence cracks or deep remelting. For B-Cr coatings produced using laser beam power 600 W, a small decrease in wear resistance was observed, but note that this coating was much thicker than diffusion borochromized layers. On the other hand, laser beam power of 1200 W caused a significant decrease in wear resistance. Newly formed B-Cr coatings had an advantageous microhardness gradient between the layer and the substrate.

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Microstructure, Microhardness, Corrosion Resistance and Chemical Composition of Mo, B and Mo-B Coatings Produced Using Laser Processing

Cited by 12 publications

References 27 publications

Experimental Investigation of Al-CuMgMn Alloy Developed by Laser Beam Surface Modification for Wear Resistance

Experimental Investigation of Al-CuMgMn Alloy Developed by Laser Beam Surface Modification for Wear Resistance

Characteristics of Cr-B Coatings Produced on Vanadis® 6 Tool Steel Using Laser Processing

Microstructural and Mechanical Properties of B-Cr Coatings Formed on 145Cr6 Tool Steel by Laser Remelting of Diffusion Borochromized Layer Using Diode Laser

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