Laser cladding of Ni/Cu/Al functionally graded coating on magnesium substrate

Yue, Tai Man; Li, T.

doi:10.1016/j.surfcoat.2007.11.007

Cited by 65 publications

(37 citation statements)

References 21 publications

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“…Indeed, over the years, intensive research efforts have been devoted to developing better coatings for combating the poor corrosion and wear properties of magnesium alloys in order to meet the challenges demanded by industry. Studies conducted by the authors [4][5][6] and other researchers [7][8][9][10] have already shown that laser cladding can be used to improve the corrosion and wear resistance of magnesium alloys.…”

Section: Introductionmentioning

confidence: 99%

Microstructure of Laser Re-Melted AlCoCrCuFeNi High Entropy Alloy Coatings Produced by Plasma Spraying

Yue

Xie

Lin

et al. 2013

Entropy

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An AlCoCrCuFeNi high-entropy alloy (HEA) coating was fabricated on a pure magnesium substrate using a two-step method, involving plasma spray processing and laser re-melting. After laser re-melting, the microporosity present in the as-sprayed coating was eliminated, and a dense surface layer was obtained. The microstructure of the laser-remelted layer exhibits an epitaxial growth of columnar dendrites, which originate from the crystals of the spray coating. The presence of a continuous epitaxial growth of columnar HEA dendrites in the laser re-melted layer was analyzed based on the critical stability condition of a planar interface. The solidification of a columnar dendrite structure of the HEA alloy in the laser-remelted layer was analyzed based on the Kurz-Giovanola-Trivedi model and Hunt's criterion, with modifications for a multi-component alloy.

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Section: Introductionmentioning

confidence: 99%

Microstructure of Laser Re-Melted AlCoCrCuFeNi High Entropy Alloy Coatings Produced by Plasma Spraying

Yue

Xie

Lin

et al. 2013

Entropy

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“…LSC of functionally graded Ni/Cu/Al on Mg substrate was investigated by Yue and Li. 56 The deposition of metal layers on the Mg substrate followed the sequence of Al, Cu, and then Ni. The total thickness of the clad region was approximately 2,000 lm, where the thickness of the Ni layer was approximately 500 lm and the thickness of the Cu layer was approximately 1,000 lm.…”

Section: Microstructure Analysismentioning

confidence: 99%

“…Yue et al 56 investigated variation of hardness along the cross section of laser-clad Ni/Cu/Al graded composite on Mg substrate. The hardness of the laser-clad surface was approximately 150 HV, whereas the hardness of the substrate was $50 HV.…”

Section: Hardness and Wear Resistancementioning

confidence: 99%

“…The top Ni layer present in the clad seems to form protective passive film under corrosion. 56 Huang et al 68 studied laser cladding of amorphous copper alloy and amorphous copper reinforced with 20% SiC on AZ91D Mg alloy. The corrosion resis- 69 also investigated the corrosion behavior of laser-clad steel on ZK60/SiC composite and compared it with thermal sprayed steel coatings on ZK60/SiC.…”

Section: Corrosion Resistancementioning

confidence: 99%

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Laser Surface Engineering of Magnesium Alloys: A Review

Singh

Harimkar

2012

JOM

126

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Magnesium (Mg) and its alloys are well known for their high specific strength and low density. However, widespread applications of Mg alloys in structural components are impeded by their insufficient wear and corrosion resistance. Various surface engineering approaches, including electrochemical processes (plating, conversion coatings, hydriding, and anodizing), gas-phase deposition (thermal spray, chemical vapor deposition, physical vapor deposition, diamond-like coatings, diffusion coatings, and ion implantation), and organic polymer coatings (painting and powder coating), have been used to improve the surface properties of Mg and its alloys. Recently, laser surface engineering approaches are attracting significant attention because of the wide range of possibilities in achieving the desired microstructural and compositional modifications through a range of laser-material interactions (surface melting, shock peening, and ablation). This article presents a review of various laser surface engineering approaches such as laser surface melting, laser surface alloying, laser surface cladding, laser composite surfacing, and laser shock peening used for surface modification of Mg alloys. The laser-material interactions, microstructural/compositional changes, and properties development (mostly corrosion and wear resistance) accompanied with each of these approaches are reviewed.

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“…The present article focuses on the study of the solidification aspect in the laser cladding of graded Ni/Cu/Al coatings on magnesium substrates, while the corrosion and wear properties of the graded coating have been discussed elsewhere. [11] Generally, knowledge of the microstructure formation and phase transformations, in which multiphase reactions occur, along the solidification path of laser-clad graded coatings is limited.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Phase Evolution in Laser Cladding of Ni/Cu/Al Multilayer on Magnesium Substrates

Yue

Lin

2009

Metall Mater Trans A

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A multilayer coating of Ni/Cu/Al was fabricated on magnesium substrates using laser cladding. The solidification behavior and the phase evolution of the compositionally graded coating were studied. The results of the X-ray diffraction (XRD) analysis together with the metallographic study showed that a series of phase evolutions had occurred along the gradient (Mg) fi (Mg) + Al 12 Mg 17 fi (Mg) + Q + k 2 fi k 1 fi k 1 + c 1 fi c 1 + (Cu) + k 1 fi (Cu) + k 1 fi (Cu) fi (CuNi) fi (Ni). The rapid solidification condition had suppressed the invariant reactions that existed in the ternary Mg-Al-Cu alloy system. As a result, many of the predicted Al-rich brittle intermetallic compounds, which are detrimental to the performance of the coating, were not produced. The solidification path during the laser cladding of the Al and Cu layers was determined and the various phases, as predicted by the corresponding phase diagram, agreed well with the experimental results. Finally, the primary arm spacing (PAS) and the solidification morphology of the dendrites in the Cu and Ni layers were analyzed in relation to the solidification conditions.

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Laser cladding of Ni/Cu/Al functionally graded coating on magnesium substrate

Cited by 65 publications

References 21 publications

Microstructure of Laser Re-Melted AlCoCrCuFeNi High Entropy Alloy Coatings Produced by Plasma Spraying

Microstructure of Laser Re-Melted AlCoCrCuFeNi High Entropy Alloy Coatings Produced by Plasma Spraying

Laser Surface Engineering of Magnesium Alloys: A Review

Microstructure and Phase Evolution in Laser Cladding of Ni/Cu/Al Multilayer on Magnesium Substrates

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