Corrosion behavior of laser melted AZ91HP magnesium alloy

Gao, Yali; Wang, C.; Yao, Man; Liu, H.

doi:10.1002/maco.200604031

Cited by 22 publications

(10 citation statements)

References 9 publications

(9 reference statements)

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“…These improvements are attributed to the combined influence of grain refinement, dissolution of intermetallic phases and retention of alloying elements in an extended solid solution. Abbas et al [7], Guo et al [8] and Gao et al [9] also observed a similar enhancement of corrosion resistance of laser-melted AZ31, AZ61, WE43 and AZ91 Mg-alloys. Jun et al [10] and Zhang et al [11] mentioned that both microhardness and wear resistance are improved by respectively Nd:YAG pulsed and CO 2 continuous Laser surface melting treatment of the AM50 and AZ91D magnesium alloys.…”

Section: Introductionmentioning

confidence: 49%

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

Khalfaoui

Valério

Masse

et al. 2010

Optics and Lasers in Engineering

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is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. a b s t r a c tA laser surface melting treatment (LSMT) was performed on a ZE41 Mg-alloy using an excimer KrF laser. The laser-melted layer depth depends on the laser scan speed. The morphology and the microstructure of the laser-melted surface were characterized, thanks to the scanning electron microscopy (SEM). The melted Mg-alloy presented a homogenous distribution of the alloying elements in the magnesium matrix. The laser surface melting treatment increased the microhardness of the ZE41 Mg-alloy and improved its corrosion resistance.

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Section: Introductionmentioning

confidence: 49%

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

Khalfaoui

Valério

Masse

et al. 2010

Optics and Lasers in Engineering

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“…The overlapped region, which was affected by remelting during adjacent laser scan, exhibited a higher corrosion rate. 36 The corrosion behavior of laser-melted AZ91D and AM60B was also investigated. Contrary to the expectations, not much improvement in corrosion resistance was observed for the laser-melted zone.…”

Section: Corrosion Resistancementioning

confidence: 99%

Laser Surface Engineering of Magnesium Alloys: A Review

Singh

Harimkar

2012

JOM

121

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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 poor corrosion properties of magnesium alloys have resulted in many investigations using LSM to improve the pitting potential. AZ91 has received the most attention [8][9][10] where it was found that LSM dissolves the β-Mg17Al12 precipitate present in the as cast alloy which was responsible for micro galvanic corrosion and the formation of α solid solution of aluminium of up to 10wt%, which provides passive properties to the melted surface. ACM720 has also been investigated [11]and it was found that the rapid solidification of LSM supressed of the formation of Al2Ca phase which is present in the cast alloy in the grain boundaries.…”

Section: Improving the Pitting Potential Of Alloysmentioning

confidence: 99%

Laser Materials Processing for Improved Corrosion Performance

Cottam¹

2012

Environmental and Industrial Corrosion - Practical and Theoretical Aspects

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Corrosion behavior of laser melted AZ91HP magnesium alloy

Cited by 22 publications

References 9 publications

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

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

Laser Surface Engineering of Magnesium Alloys: A Review

Laser Materials Processing for Improved Corrosion Performance

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