Formation and properties of Fe-based amorphous/nanocrystalline alloy coating prepared by wire arc spraying process

Cheng, Jiangbo; Liang, Xiubing; Xu, Bin; Wu, Yujuan

doi:10.1016/j.jnoncrysol.2009.06.024

Cited by 61 publications

(35 citation statements)

References 37 publications

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“…It was concluded that grain boundaries in NC Pd and Si with high energy bicrystalline grain boundaries consist of a glassy, glue-like intergranular phase by molecular dynamic simulation [29][30][31]. The existence of an amorphous state in pure metals has been confirmed both experimentally and theoretically [32][33][34][35][36] except for amorphous alloys in the binary systems being reported [37][38][39][40]. In the current model, the grain-boundary layer of the NC materials is assumed to be a glassy structure.…”

Section: Simulation Modelmentioning

confidence: 64%

The effect of nanostructural hierarchy on the mechanical properties of aluminium alloys during deformation processes

Zhao

2012

J Mater Sci

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New generation of lightweight structures and technologies enables the development of materials to exhibit superior property combinations. In the present work, cellular automata is used to address the problem of dislocation behaviour and 4 factors: (i) a high density of dislocations, (ii) sub-nanometre intragranular solute clusters, (iii) 2 geometries of nanometre-scale intergranular solute structures and (iv) grain sizes tens of nanometres in diameter featuring in aluminium alloys containing a nanostructural hierarchy and exhibiting record strength with good ductility-an aerospace grade 7075 alloy exhibits a yield strength of 1 GPa and total elongation to failure of 9 %. We show that the clusters and geometries of nanometre-scale intergranular solute structures govern the strength of such material, resulting in their increasing elongation. Our results demonstrate that this simulation explains the phenomena of the super-strong materials of new generation with entirely new regimes of propertyperformance space.

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Section: Simulation Modelmentioning

confidence: 64%

The effect of nanostructural hierarchy on the mechanical properties of aluminium alloys during deformation processes

Zhao

2012

J Mater Sci

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“…The high solidification and cooling rates also induce a reduction in grain size during laser cladding process. The grain refinement attributes to the fast and uniform nucleation during solidification, which allow the grains for transient growth before impingement between neighboring grains . The decrease in grain size is another reason to provide significant improvement of corrosion resistance of cladding layer.…”

Section: Resultsmentioning

confidence: 99%

A study on corrosion behaviors of laser cladded Fe−Cr−Ni coating in as‐cladded and machined conditions

Zhang

Liu

et al. 2018

Materials & Corrosion

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This paper investigates the effect of turning process on surface quality and corrosion behaviors of laser cladded coatings on the 1045 steel. Corrosion resistance of the 1045 steel is improved by laser cladded Fe−Cr−Ni coatings. The as‐cladded coating behaves nobler and more resistant to corrosion compared to the 1045 steel substrate. By using turning as a finish process, surface roughness Ra of the laser cladded coating is decreased to 0.517 µm to meet the surface roughness requirement (i.e., Ra ≤ 0.8 µm) of a single‐telescopic hydraulic column. Also, surface defects including laps, cavities, and adhered material particles occur on the cladded coatings after machining. The machined coatings exhibit comparable polarization resistance compared to the as‐cladded condition, and the polarization resistance of the machined surface increases with feed rate increasing. The corrosion pits show sensitivity on feed marks induced by machining. This concentrated distribution of corrosion pits is a result of the fluctuation of local electron work function (EWF), which promotes the formation of local corrosion cells in adjacency to feed marks.

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“…The additions of Cr and Nb promote the decreasing size of crystalline and the formation of a full amorphous phase. It is beneficial to improving the wear resistance of the coating with nanoparticles distributing uniform in amorphous matrix [28]. According to the Hall-Petch formula, the smaller the grain size, the higher the hardness and strength of the coating.…”

Section: The Relationships Between Microstructure Mechanical Propertmentioning

confidence: 99%

Effects of Cr and Nb Additions on Sliding Wear Behaviors of the FePSiB Coatings

et al. 2018

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The tribological properties of the FePSiB amorphous/nanocrystalline coatings with Cr and Nb additions were investigated in reciprocating mode against tungsten carbide friction coupling with different dry sliding conditions. The wear rates of the FePSiB-based coatings increase linearly with the normal load and sliding speed. The coatings with Cr and Nb promote the formation of successive and compact oxide film on friction surface, which decreases significantly wear rate of the coating. Nano-mechanical characterization done to map the correlation between the elastic properties and wear resistance. The main damage mechanisms of the FePSiB-based coatings under dry friction conditions are abrasion wear, delamination failure and oxidation wear.

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Formation and properties of Fe-based amorphous/nanocrystalline alloy coating prepared by wire arc spraying process

Cited by 61 publications

References 37 publications

The effect of nanostructural hierarchy on the mechanical properties of aluminium alloys during deformation processes

The effect of nanostructural hierarchy on the mechanical properties of aluminium alloys during deformation processes

A study on corrosion behaviors of laser cladded Fe−Cr−Ni coating in as‐cladded and machined conditions

Effects of Cr and Nb Additions on Sliding Wear Behaviors of the FePSiB Coatings

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