Investigation of the corrosion for Mg–xGd–3Y–0.4Zr (x=6,8,10,12wt%) alloys in a peak-aged condition

Chang, Jian-Wei; Guo, Xingwu; He, Shangming; Fu, Penghuai; Peng, Liming; Ding, Wenjiang

doi:10.1016/j.corsci.2007.06.003

Cited by 128 publications

(38 citation statements)

References 21 publications

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“…The results shown in Figure 8 indicated that α-Mg was the major phase, and that the precipitated phases of the as-cast, T4 and T6 samples both contain Mg 24 (Y, Nd) 5 and Mg 3 (Y, Nd); this findings is consistent with Nie's results [13,33]. "Undissolved particles" remained after the solidification process, as shown in Figure 3.…”

Section: Resultssupporting

confidence: 84%

“…This phenomenon implied that square phases had a more negative potential than the α-Mg matrix. The crystal structure of Mg 24 (Y, Nd) 5 phase is similar to that of Mg 24 Y 5 phase, which is a body-centered cubic (BCC) cell. The crystal structure of α-Mg is close-packed hexagonal (HCP) cell.…”

Section: Discussionmentioning

confidence: 89%

“…Researchers have successfully developed many commercial Mg-RE alloys, including WE43, WE54, and EW75 alloys [2][3][4][5]. Heat treatment is vital in the transformation of precipitated phases and the redistribution of alloying elements, which contribute to improve mechanical property of Mg-RE alloys [6,7].…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Resultssupporting

confidence: 84%

Section: Discussionmentioning

confidence: 89%

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

Yang

2017

Metals

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“…Magnesium and its alloys have high strength/weight ratio and are becoming more important in engineering applications, especially for aerospace and aircraft industries, due to the desire for body weight reduction and high specific stiffness [1]. Among various magnesium alloys, rare earth containing alloys show much better mechanical properties at room and high temperatures such as excellent strength and creep resistance due to solution hardening and precipitation hardening [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

The High Temperature Oxidation Behavior of Mg–Gd–Y–Zr Alloy

Liu

Wang

2009

Oxid Met

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The oxidation behavior of pure Mg and Mg-Gd-Y-Zr alloy was studied in O 2 at 300°C with and without the presence of water vapor. The kinetics curves revealed improved oxidation resistance of Mg-Gd-Y-Zr alloy in O 2 , compared with pure Mg. However, when water vapor co-existed with oxygen, the oxidation rate of Mg-Gd-Y-Zr alloy was accelerated; whereas, the oxidation rate of pure Mg was restrained. Detailed XPS analysis of pure Mg oxidized with water vapor revealed that the reduced oxidation rate could be strongly linked with the outer Mg(OH) 2 film. On the contrary, for Mg-Gd-Y-Zr alloy, an incomplete Mg(OH) 2 film was present in the outer region of oxide layer, which can provide a ready pathway for water vapor transport to the inner part of the oxide film and which has little oxidation resistance to water vapor.

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“…In the case of Mg-xGd-3Y-0.4Zr, the corrosion products were enriched with Gd, but the compactness of the layer decreased with the increase of Gd content. [31] Conversely, in the case of some La-containing alloys, the passive film improved the corrosion resistance of the alloys by the formation of a more compact and thin corrosion product layer. [27] If these electrolyte layers are thin, which is probably the case for some sites of the implant, high pH values are reached as a consequence of the corrosion reaction occurring at the implant surface facilitating the formation of insoluble corrosion products, and locally inducing different corrosion rates.…”

Section: Introductionmentioning

confidence: 99%

Cellular response to rare earth mixtures (La and Gd) as components of degradable Mg alloys for medical applications

Grillo

Álvarez

Mele

2014

Colloids and Surfaces B: Biointerfaces

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Investigation of the corrosion for Mg–xGd–3Y–0.4Zr (x=6,8,10,12wt%) alloys in a peak-aged condition

Cited by 128 publications

References 21 publications

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

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

The High Temperature Oxidation Behavior of Mg–Gd–Y–Zr Alloy

Cellular response to rare earth mixtures (La and Gd) as components of degradable Mg alloys for medical applications

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