Excimer laser treatment of ZE41 magnesium alloy for corrosion resistance and microhardness improvement

Khalfaoui, Walid; Valério, E.; Masse, Jean-Eric; Autric, M.

doi:10.1016/j.optlaseng.2010.03.009

Cited by 54 publications

(17 citation statements)

References 14 publications

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“…Therefore, the laser-treated alloy became nobler than the untreated one. A similar result to this work was discussed by the authors Khalfaoui et al [19]. These same authors have also shown, when the laser-treated and untreated samples were exposed in a corrosive solution for 2 h, several corrosion pits were observed in the untreated surface while the laser-treated layer was unaltered.…”

Section: Corrosion Resistance Tafel Plots For Lsr-treated and Untreasupporting

confidence: 91%

The Alumina Film Nanomorphology Formed to Improve the Corrosion Resistance of Al-2.0 wt% Fe Alloy as Result of the Laser Surface Melting Technique Applied

Pariona¹,

Micene²

2017

ACES

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The laser surface remelting (LSR) treatment was performed to Al-2.0 wt% Fe alloy with a 2 kW Yb-fiber laser (IPG YLR-2000S). The substrate and laser-treated material characterization were executed using different techniques. Among them, the microstructure was analyzed by optical microscope, SEM, low-angle X-ray diffraction (LAXRD) and the corrosion test was made in aerated solution of 0.1 M H 2 SO 4 at a temperature of 25˚C ± 0.5˚C. As result was shown, the micrograph of LSR-treated material displaying can be a fine cellular structure and the existence of certain nanoporosities and a similar to a nano-dendritic growth was observed too. The characteristic of melted zone was constituted of metastable phases according to the result of x-rays and the behavior corrosion as a result of the LSR-treated sample, which it was shown to be more resistant to corrosion than the untreated sample. A comparative study was carried out of the cyclic polarization of the laser-treated and untreated samples, demonstrating that the reduction and oxidation reverse peaks were not observed and being the cyclic polarization behavior was of irreversible character in both samples, however, the LSR-treated sample propitious the passivity on the surface also reduced the corrosion phenomena. Wherefore, this type of laser-treated alloy can be applied in the aerospace, aeronautic and automobilist industries.

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Section: Corrosion Resistance Tafel Plots For Lsr-treated and Untreasupporting

confidence: 91%

The Alumina Film Nanomorphology Formed to Improve the Corrosion Resistance of Al-2.0 wt% Fe Alloy as Result of the Laser Surface Melting Technique Applied

Pariona¹,

Micene²

2017

ACES

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“…The changes in both the structure and the morphology of phases triggered this way may lead to creating a material with a new spectrum of properties [1][2][3][4][5][6][7][8][9][10][11]. Modification of magnesium alloys surface layer is an interesting research issue of a high application potential [12][13][14][15][16][17][18][19]. These materials, rated as the most innovative and prospective metallic materials, are distinguished by low density and high specific strength.…”

Section: Introductionmentioning

confidence: 99%

Structural Aspects of Remelting of the AZ91 Magnesium Alloy Surface Layer

Iwaszko

Strzelecka²

2016

Archives of Foundry Engineering

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In this study, modification of the AZ91 magnesium alloy surface layer with a CO 2 continuous wave operation laser has been taken on. The extent and character of structural changes generated in the surface layer of the material was being assessed on the basis of both macro-and microscopy investigations, and the EDX analysis. Considerable changes in the structure of the AZ91 alloy surface layer and the morphology of phases have been found. The remelting processing was accompanied by a strong refinement of the structure and a more uniform distribution of individual phases. The conducted investigations showed that the remelting zone dimensions are a result of the process parameters, and that they can be controlled by an appropriate combination of basic remelting parameters, i.e. the laser power, the distance from the sample surface, and the scanning rate. The investigations and the obtained results revealed the possibility of an effective modification of the AZ91 magnesium alloy surface layer in the process of remelting carried out with a CO 2 laser beam.

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“…Among the many surface modification methods, laser surface treatment [6][7][8][9][10][11][12], including laser cladding has been used successfully to deposit different coating materials on Mg and its alloys in order to improve their corrosion and wear resistance. With regard to laser cladding of Zr on Mg, the early work of Subramanian et al [6] on the laser cladding of Mg-Zr alloys on Mg substrates showed that an excellent metallurgical bond was obtained.…”

Section: Introductionmentioning

confidence: 99%

Microstructure development in laser forming of zirconium coatings on AZ91D magnesium alloy substrates

Yue

Xie

Lin

et al. 2012

Journal of Alloys and Compounds

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Excimer laser treatment of ZE41 magnesium alloy for corrosion resistance and microhardness improvement

Cited by 54 publications

References 14 publications

The Alumina Film Nanomorphology Formed to Improve the Corrosion Resistance of Al-2.0 wt% Fe Alloy as Result of the Laser Surface Melting Technique Applied

The Alumina Film Nanomorphology Formed to Improve the Corrosion Resistance of Al-2.0 wt% Fe Alloy as Result of the Laser Surface Melting Technique Applied

Structural Aspects of Remelting of the AZ91 Magnesium Alloy Surface Layer

Microstructure development in laser forming of zirconium coatings on AZ91D magnesium alloy substrates

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