Improved corrosion and wear resistance of Mg alloys via laser surface modification of Al on AZ31B

Paital, Sameer R.; Bhattacharya, Arpita; Moncayo, Marco A.; Ho, Yee Hsien; Mahdak, Kristopher; Nag, S.; Banerjee, Rajarshi; Dahotre, Narendra B.

doi:10.1016/j.surfcoat.2011.10.009

Cited by 58 publications

(25 citation statements)

References 25 publications

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“…LSM treatment has been effective in improving the corrosion resistance of AZ and AM type of magnesium alloys, such as AZ31, AZ61, AZ91, and AM60 [122][123][124][125][126][127][128]. Improved corrosion resistance of these alloys was mainly attributed to the pronounced refinement of α-Mg grains and uniform redistribution of inter metallic compounds after laser treatment.…”

Section: Corrosion Behaviourmentioning

confidence: 99%

Selective Laser Melting of Magnesium and Magnesium Alloy Powders: A Review

Manakari

Parande

Gupta

2016

Metals

184

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Magnesium-based materials are used primarily in developing lightweight structures owing to their lower density. Further, being biocompatible they offer potential for use as bioresorbable materials for degradable bone replacement implants. The design and manufacture of complex shaped components made of magnesium with good quality are in high demand in the automotive, aerospace, and biomedical areas. Selective laser melting (SLM) is becoming a powerful additive manufacturing technology, enabling the manufacture of customized, complex metallic designs. This article reviews the recent progress in the SLM of magnesium based materials. Effects of SLM process parameters and powder properties on the processing and densification of the magnesium alloys are discussed in detail. The microstructure and metallurgical defects encountered in the SLM processed parts are described. Applications of SLM for potential biomedical applications in magnesium alloys are also addressed. Finally, the paper summarizes the findings from this review together with some proposed future challenges for advancing the knowledge in the SLM processing of magnesium alloy powders.

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Section: Corrosion Behaviourmentioning

confidence: 99%

Selective Laser Melting of Magnesium and Magnesium Alloy Powders: A Review

Manakari

Parande

Gupta

2016

Metals

184

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“…Interestingly, the presence of Mg 12 Al 17 phase was completely suppressed in the alloyed surface because a low heat of formation favors its dissociation. Paital et al 43 investigated LSA of AZ31B with Al. The different phases observed on the surface after LSA were Mg, Al, Al 12 Mg 17 , MgO 2 , and Al 2 O 3 .…”

Section: Microstructure Analysismentioning

confidence: 99%

“…The increase in fractional area up to 50% resulted in increase in wear resistance; thereafter, the wear properties deteriorated because of the excessive brittleness in the laser-alloyed region associated with the formation of hard/brittle Mg-Al intermetallic compounds. Paital et al 43 investigated wear behavior of laser alloyed AZ31B with Al. Wear test data showed that LSA resulted in a significant reduction in weight loss.…”

Section: Hardness and Wear Resistancementioning

confidence: 99%

“…The dense intermetallic compounds were mostly not affected, even though corrosion effects on these particles were observed at some locations. Paital et al 43 investigated corrosion behavior of laser-alloyed AZ31B with Al using potentiodynamic polarization experiments. Nobler corrosion potential was observed in the case of laser-alloyed samples compared with that for as-received Mg alloy.…”

Section: Corrosion Resistancementioning

confidence: 99%

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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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“…However, alloying with Fe, Cu and Ni has a detrimental effect on the corrosion resistance of Mg alloys [14], and downgrades the quality of these layers. In contrast, Al and Al-Si alloys with electrochemical potentials very close to Mg but with much better corrosion resistance prove to be very attractive additives [15,16]. LB alloying with Al-Si additives improves the corrosion potential by about 300 mV [15].…”

Section: Introductionmentioning

confidence: 99%

Improved Surface Properties of AZ31 and AZ91 Mg alloys Due to Electron Beam Liquid Phase Surface Treatment

Fritzsch

Zenker

Buchwalder

2015

Materials Today: Proceedings

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Electron beam alloying (EBA) was applied to improve the surface properties of AZ31B and AZ91D magnesium alloys. Three Albased additives with different Si contents (0, 12, and 30 wt.%) were pre-deposited on the Mg substrates by atmospheric plasma spraying (APS) and cold gas spraying (CGS). Spraying temperatures above (APS) and below (CGS) the melting point of the oxidation-sensitive Al-based sprayed material caused different amounts of oxide in the coatings, resulting in varying layer qualities. EBA layers using the CGS deposition technique are more homogeneous and reached hardness values up to 200…220 HV0.1. Potentiodynamic polarization tests in 0.001 M NaCl solution showed, compared to the base material, a positive shift in corrosion potential up to 400 mV for EBA layers using AlSi30, with a reduction in corrosion current density of more than 3 times compared to the untreated base materials. The coefficient of wear for all EBA layers reached a minimum at an applied load of 25 N and was reduced by 50 % in comparison to the base material.

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Improved corrosion and wear resistance of Mg alloys via laser surface modification of Al on AZ31B

Cited by 58 publications

References 25 publications

Selective Laser Melting of Magnesium and Magnesium Alloy Powders: A Review

Selective Laser Melting of Magnesium and Magnesium Alloy Powders: A Review

Laser Surface Engineering of Magnesium Alloys: A Review

Improved Surface Properties of AZ31 and AZ91 Mg alloys Due to Electron Beam Liquid Phase Surface Treatment

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