Wear mechanism of nanotwinned cBN tools in nano-cutting Ni-Cr-Fe alloy by molecular dynamics simulation

Hao, Zhaopeng; Zhang, Han; Fan, Yihang; Cui, Gangwei

doi:10.1016/j.jmapro.2022.07.023

Cited by 11 publications

(4 citation statements)

References 31 publications

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“…In addition, the structure of the pile-up has a critical difference with some atoms unevenly distributed along the sides of the groove. The frictional property of FeCrNi can be expressed through the material wear, which is determined through wear rate, K wr [33,35]:…”

Section: Resultsmentioning

confidence: 99%

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Optimizing the friction behavior of medium entropy alloy via controllable coherent nanoprecipitation

Kong,

Fang,

2023

Modelling Simul. Mater. Sci. Eng.

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In recent years, FeCrNi medium entropy alloy, a new material with high hardness, high strength, good ductility and wear resistance, has been widely studied. In this work, the effect of precipitation volume fraction on the friction behavior of FeCrNi is studied by molecular dynamics simulation. With the increase of precipitation volume fraction, the average friction coefficient shows an upward trend. When the volume fraction of precipitation is between 2.33% and 3.10%, the wear resistance of FeCrNi would be enhanced after the nanoscratching. When the volume fraction of precipitation is between 2.33% and 3.10%, the normal force is larger, which means that a certain precipitation volume fraction will strengthen FeCrNi. Low precipitation volume fraction can effectively reduce the wear volume and wear rate during scratching, thus effectively reducing frictional force and friction coefficient. The interaction between dislocation and precipitation is an important factor that hinders dislocation propagation, leading to sample strengthening and the increase of wear volume, which is manifested as the increase of normal force and frictional force. The results guide the study of the effect of multiple precipitation on frictional properties and precipitation-dislocation interaction in FeCrNi.

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Section: Resultsmentioning

confidence: 99%

“…where V is the wear volume [32,35], expressed as the number of atoms worn; F z is the normal force during nanoscratching, and L is the nanoscratching distance. The statistical results of worn atom number and wear rate under different precipitation volume fraction are shown in figure 7.…”

Section: Resultsmentioning

confidence: 99%

Optimizing the friction behavior of medium entropy alloy via controllable coherent nanoprecipitation

Kong,

Fang,

2023

Modelling Simul. Mater. Sci. Eng.

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“…Wang et al [27] found that the tool wear morphology on the rake face of the cutting tool when turning hardened 40Cr steel at mild cutting speeds is characterized by microchipping and that, at extreme cutting speeds, is characterized by crater wear. Hao et al [28] apply the molecular dynamics method to study the tool wear of the nt-cBN tool during the nano-cutting of Nickel-based superalloys. They found that the main wear mechanism of the tool in the mild-parameter-cutting process is diffusion wear.…”

Section: Introductionmentioning

confidence: 99%

Research on Tool Wear and Surface Integrity of CFRPs with Mild Milling Parameters

Qiu

Zhang

et al. 2023

Coatings

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Carbon fiber-reinforced polymer composites are widely used in aviation and aerospace applications due to their excellent mechanical properties. Numerous studies have focused on tool wear at extreme machining parameters (f ≥ 540 mm/min) to accelerate tool wear experiments. However, using mild machining parameters is also instructive for current process production. To investigate the effect of wear on the surface integrity of CFRPs under mild parameters, a tool wear experiment on CFRPs was carried out at a conventional feed rate (f = 60 mm/min). The results show a cutting temperature increase of 47%, a cutting force increase of 53% and a flank wear width increase of 282% for PCD tools (with mild milling parameters) from 0 to 100 m of cutting length. As the cutting temperature reaches the glass transition temperature, Tg, during the stable wear stage, severe burrs and a large number of cavities appeared on the groove, and the subsurface with granular wear on flank wear land due to the transform of the matrix. Furthermore, Ra and Rz exhibit good indicators of cutting length and subsurface damage.

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“…Among them, the coating prepared by laser cladding has excellent performance and continuous integrity [2]. Ni-based alloy is widely used in metallurgy, aviation and machinery fields due to its high hardness [3,4]. WC ceramic has high hardness and chemical stability, and nickel and other metals to form cermet composites (cemented carbide), which is commonly used in cutting tools, wear-resistant parts [5].…”

Section: Introductionmentioning

confidence: 99%

Research on corrosion resistance of ship propeller’s coating fabricated by laser

Liu¹,

Xu²

2023

J. Phys.: Conf. Ser.

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A novel method for the additive manufacturing was proposed to fabricate Ni-WC coating. The laser power and scanning speed were 1400 W and 200 mm/min-1, respectively. The microstructure, composition, hardness, friction properties and corrosion resistance were analyzed. The experimental results exhibit the coating’s average hardness is 614.3 HV0.5. It is about 3.1 times higher than the copper substrate. The wear rate of Ni-WC coating is only 9.7×10-5 mm3·N-1·m-1 due to the existence of hard phase and WC reinforced phase. The Ni-WC coating’s corrosion current density is 2.34×10-7 mA·mm-2, which shows a good corrosion resistance than the substrate. The performance of the coating is improved compared with the substrate. The bonding is good without defects.

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Wear mechanism of nanotwinned cBN tools in nano-cutting Ni-Cr-Fe alloy by molecular dynamics simulation

Cited by 11 publications

References 31 publications

Optimizing the friction behavior of medium entropy alloy via controllable coherent nanoprecipitation

Optimizing the friction behavior of medium entropy alloy via controllable coherent nanoprecipitation

Research on Tool Wear and Surface Integrity of CFRPs with Mild Milling Parameters

Research on corrosion resistance of ship propeller’s coating fabricated by laser

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