Corrosion behaviour of laser surface melted magnesium alloy AZ91D

Taltavull, C.; Torres, B.; López, A.J.; Rodrigo, P.; Otero, E.; Atrens, Andrej; Rams, J.

doi:10.1016/j.matdes.2013.12.069

Cited by 77 publications

(33 citation statements)

References 51 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%

“…In the case of magnesium alloys, it has been observed that, grain refinement and homogenization of compositional distribution can decrease the volume fraction of the effective cathodes, thereby limiting the cell action caused by the accumulation of cathodic phases [129]. In addition, the corrosion resistance also increased with the enrichment of aluminium content in the laser-melted zone because of the selective evaporation of magnesium, providing passive characteristics to the melted surface [124]. Enrichment of alloying elements can shift the corrosion potential of α-Mg to the positive direction, lowering the corrosion susceptibility of α-Mg matrix [130].…”

Section: Corrosion Behaviourmentioning

confidence: 99%

See 1 more Smart Citation

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%

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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“…Among them, LSM is a surface modification technique, which consists in irradiating in irradiating surface of Mg alloys with enough energy to melt their external part [6]. Thus, LSM process can refine the microstructure and dissolve the second phase on the surface.…”

Section: Introductionmentioning

confidence: 99%

Microstructure Evolution and Biodegradation Behavior of Laser Rapid Solidified Mg–Al–Zn Alloy

Bin

et al. 2017

Metals

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Abstract:The too fast degradation of magnesium (Mg) alloys is a major impediment hindering their orthopedic application, despite their superior mechanical properties and favorable biocompatibility. In this study, the degradation resistance of AZ61 (Al 6 wt. %, Zn 1 wt. %, remaining Mg) was enhanced by rapid solidification via selective laser melting (SLM). The results indicated that an increase of the laser power was beneficial for enhancing degradation resistance and microhardness due to the increase of relative density and formation of uniformed equiaxed grains. However, too high a laser power led to the increase of mass loss and decrease of microhardness due to coarsened equiaxed grains and a reduced solid solution of Al in the Mg matrix. In addition, immersion tests showed that the apatite increased with the increase of immersion time, which indicated that SLMed AZ61 possessed good bioactivity.

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“…Magnesia is also used in thin-film semi-conductors, in making crucibles where high corrosion resistance is required [12], and as catalyst support in reforming bioethanol for hydrogen production [13]. Laser surface treatments of Mg alloys have also received attention regarding mostly their corrosion properties [14][15][16][17]. The majority of the attention has been on surface melting with CW or long pulsed lasers to reduce the high corrosion rate of Mg alloys for their use in mechanical, aerospace and lightweight structure applications.…”

Section: Introductionmentioning

confidence: 99%