Effect of heat treatment on corrosion behaviour of magnesium alloy AZ91D in simulated body fluid

Zhou, Wei; Shen, Tian; Aung, Naing Naing

doi:10.1016/j.corsci.2009.11.030

Cited by 228 publications

(92 citation statements)

References 28 publications

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“…Magnesium alloys are promising candidates to replace steel and aluminum alloys in many struc-tural and mechanical applications owing to their attractive properties of excellent castability, good machinability, superior damping capacity, outstanding stiffness-to-weight ratio, and ease of recyclability [2][3][4]. The AM50 alloy is one of the most successfully-used magnesium alloys in the automotive industry; however, its application is still limited by its strength and most especially its poor corrosion resistance [5,6].…”

Section: Introductionmentioning

confidence: 99%

Corrosion and mechanical properties of AM50 magnesium alloy after modified by different amounts of rare earth element Gadolinium

et al. 2016

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Abstract:To improve the corrosion and mechanical properties of the AM50 magnesium alloy, different amounts of the rare earth element gadolinium were used. The microstructure, corrosion and mechanical properties were evaluated by X-ray diffraction, scanning electron microscopy, energy dispersive spectroscopy, and electrochemical and mechanical stretch methods. The results indicate that, with Gd addition, the amount of the Al 2 Gd 3 phase increased while the β-Mg 17 Al 12 phase amount decreased. Due to the Gd addition, the grain of the AM50 magnesium alloy was significantly refined, which improved its tensile strength. Further, the decrease in the amount of the β phase improved the corrosion resistance of the alloy. The fracture mechanism of the Gd-modified AM50 magnesium alloy was a quasi-cleavage fracture. Finally, the optimum corrosion residual strength of the AM50 magnesium alloy occurred with 1 wt.% of added Gd.

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Section: Introductionmentioning

confidence: 99%

Corrosion and mechanical properties of AM50 magnesium alloy after modified by different amounts of rare earth element Gadolinium

et al. 2016

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“…The difference among the aging samples was that precipitated phases were distributed more uniformly after deep cryogenic treatment, as shown in Figure 3g,h. The precipitated phases served as the cathodes of electrochemical reactions that accelerate the corrosion process [31,32].…”

Section: Resultsmentioning

confidence: 99%

The Effect of Deep Cryogenic Treatment on the Corrosion Behavior of Mg-7Y-1.5Nd Magnesium Alloy

Yang

2017

Metals

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Abstract:The effect of quenching on the corrosion resistance of Mg-7Y-1.5Nd alloy was investigated. The as-cast alloy was homogenized at 535 • C for 24 h, followed by quenching in air, water, and liquid nitrogen. Then, all of the samples were peak-aged at 225 • C for 14 h. The microstructures were studied by scanning electron microscopy, energy-dispersive spectrometry, and X-ray diffraction. Corrosion behavior was analyzed by using weight loss rate and gas collection. Electrochemical characterizations revealed that the T4-deep cryogenic sample displayed the strongest corrosion resistance among all of the samples. A new square phase was discovered in the microstructure of the T6-deep cryogenic sample; this phase was hugely responsible for the corrosion property. Cryogenic treatment significantly improved the corrosion resistance of Mg-7Y-1.5Nd alloy.

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“…Mg is also a fundamental element in the human body that is associated with many metabolic functions. Unfortunately, Mg-based implants degrade very rapidly in a physiological environment, leading to a failure of the implants before the tissues have been able to heal completely [2,[4][5][6]. In addition, the relatively low mechanical strength of magnesium limits its use for load-bearing applications.…”

Section: Introductionmentioning

confidence: 99%

“…Magnesium alloys are biocompatible, biodegradable materials that are highly desirable for use as biodegradable implants [1][2][3][4][5][6]. Recently, Mg and its alloys have been used to make temporary stents for coronary applications since their biodegradability and biocompatibility can minimize the risk of thrombosis.…”

Section: Introductionmentioning

confidence: 99%

Microstructure, mechanical properties, corrosion behavior and hemolysis of as-extruded biodegradable Mg-Sn-Zn alloy

Hou

Zhong

Pan

et al. 2016

AIP Conference Proceedings

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Synthesis of biodegradable Mg-Zn alloy using mechanical alloying: Effect of ball to powder weight ratio AIP Conference Proceedings 1756, 020001 (2016) and mechanical properties, as well as good biocompatibility, and are expected to totally biodegrade in the body environment. The microstructure mechanical properties, corrosion behaviors and hemolysis of biodegradable Mg-Sn-Zn alloy were investigated under three extrusion ratios in the present work. It is revealed that the as-extruded microstructure is obviously refined with smaller grains compared with the as-cast structure while some twins form simultaneously. The tensile strengths of the as-extruded alloys fabricated with the higher extrusion ratio is 249MPa, and elongations is 16.3% respectively. Besides, the corrosion rate of as-extruded magnesium alloys increases with the increasing extrusion ratio. The hemolysis test result shows that the hemolysis rate of biodegradable magnesium alloys fabricated with the higher extrusion ratio is 4.8%, when hemolysis rate lower than 5% has been demonstrated safe according to ISO 10993-4. In conclusion, the as-extruded biodegradable Mg-Sn-Zn alloy shows great potential as a novel medical implant material.

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Effect of heat treatment on corrosion behaviour of magnesium alloy AZ91D in simulated body fluid

Cited by 228 publications

References 28 publications

Corrosion and mechanical properties of AM50 magnesium alloy after modified by different amounts of rare earth element Gadolinium

Corrosion and mechanical properties of AM50 magnesium alloy after modified by different amounts of rare earth element Gadolinium

The Effect of Deep Cryogenic Treatment on the Corrosion Behavior of Mg-7Y-1.5Nd Magnesium Alloy

Microstructure, mechanical properties, corrosion behavior and hemolysis of as-extruded biodegradable Mg-Sn-Zn alloy

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