Oxidation Behavior of AZ91D Magnesium Alloy Containing Nd or Gd

Arrabal, R.; Pardo, Á.; Merino, M.C.; Mohedano, M.; Casajús, P.; Paucar, K.; Matykina, E.

doi:10.1007/s11085-011-9265-3

Cited by 28 publications

(20 citation statements)

References 21 publications

(27 reference statements)

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“…an Al-rich layer [80]. This model could explain the oxidation mechanism around the eutectic temperature but it did not involve local melting or the formation of liquid islands that could accelerate the oxidation rate [26,27,38].…”

Section: Intermetallic Phasesmentioning

confidence: 99%

“…Consequently, growth of the oxide nodules is accelerated. Arrabal et al [80] analysed the oxide morphology and elemental distribution for AZ91 after oxidation in air at 410 C for 4 hour. After oxidation, the pore size on the surface was similar to that of the β-phase particles.…”

Section: Intermetallic Phasesmentioning

confidence: 99%

“…Thus, Arrabal et al [80] suggested that, in addition to the Mg vapour, the vaporisation of Zn during dissolution of the β-phase (Mg17Al12) also contributed to the film cracking and led to the superficial pores.…”

Section: Intermetallic Phasesmentioning

confidence: 99%

“…The low melting temperature of Mg-Zn intermetallic phases (341 C) can cause significant evaporation of Mg and selective oxidation at high temperatures [94]. In addition, Zn tends to sublime [80], which leads to the formation of pores within both the matrix and the oxide scale, accelerating cracking of the oxide scale [42]. Hence, Zn is normally used as a ternary element, such as in the AZ series of Mg alloys, to improve the strength because the low Zn content has less influence on oxidation [32].…”

Section: Znmentioning

confidence: 99%

“…Arrabal et al [80] studied the solid-state oxidation resistance and microstructure of AZ91D containing 1.4 wt.% Nd.…”

Section: Cementioning

confidence: 99%

See 4 more Smart Citations

Oxidation of magnesium alloys at elevated temperatures in air: A review

et al. 2016

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Highlights The oxidation behaviours of Mg alloys from low to high temperatures are reviewed. Characteristics of MgO during oxidation is discussed. Mechanisms of Mg oxidation is presented. Effect of various alloying elements is analysed. AbstractThis paper reviews (i) the oxidation of Mg alloys at elevated temperatures in air; (ii) the influence of alloying elements on the oxidation of Mg alloys; and (iii) the progress in the development of oxidation-resistant Mg alloys. Low oxidation rates have been shown by Mg alloys containing the alloying elements, Ca, Be and rare earth elements. However, these alloying elements may also decrease mechanical properties, such as ductility.

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Section: Intermetallic Phasesmentioning

confidence: 99%

Section: Intermetallic Phasesmentioning

confidence: 99%

Section: Intermetallic Phasesmentioning

confidence: 99%

Section: Znmentioning

confidence: 99%

“…Arrabal et al [80] studied the solid-state oxidation resistance and microstructure of AZ91D containing 1.4 wt.% Nd.…”

Section: Cementioning

confidence: 99%

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Oxidation of magnesium alloys at elevated temperatures in air: A review

et al. 2016

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Oxidation behaviour of AM50 magnesium alloy containing lanthanide elements

Arrabal

Pardo

Mohedano

et al. 2012

Materials and Corrosion

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The influence of Nd and Gd additions on the microstructure, hardness and oxidation of AM50 magnesium alloy was investigated. Nd and Gd formed Al2Nd, Al2Gd, AlMnNd and AlMnGd intermetallics and reduced the amount of β‐phase. Grain size and hardness did not change significantly with the addition of Nd or Gd. For all the alloys, surface degradation was negligible at temperatures below 370 °C. However, at 410 °C, severe oxidation was observed and hardness values decreased by ∼30% due to grain coarsening. At this temperature, the modified alloys revealed oxidation rates between ∼2.3 and 20 times smaller than the unmodified alloy.

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Effect of Ce addition on the high‐temperature oxidation resistance of Mg–Gd alloys

Jiang

et al. 2022

Materials & Corrosion

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In the present study, the oxidation resistance of magnesium alloyed with Gd and Ce was investigated. The high-temperature oxidation resistance of Mg-3.5Gd-xCe (x = 0, 0.2, 0.4, 0.7 and 1.0 wt%) alloys was evaluated at temperatures between 550°C and 650°C. Results indicate that adding less than 0.7 wt% Ce resulted in high oxidation resistance, whereas the Ce addition exceeding 0.7 wt% deteriorated the oxidation resistance. The high oxidation resistance phenomenon is attributed to the formation of compact oxide films primarily composed of MgO, Gd 2 O 3 , and a small amount of CeO 2 on the surface of Mg-3.5Gd-0.2Ce and Mg-3.5Gd-0.4Ce alloys. These compact oxide films can prevent the matrix from experiencing further oxidation. The deteriorated oxidation resistances of Mg-3.5Gd-0.7Ce and Mg-3.5Gd-1Ce alloys were found to be due to the severe internal oxidation caused by the distributed Mg 12 Ce phases along the grain boundaries.

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Oxidation Behavior of AZ91D Magnesium Alloy Containing Nd or Gd

Cited by 28 publications

References 21 publications

Oxidation of magnesium alloys at elevated temperatures in air: A review

Oxidation of magnesium alloys at elevated temperatures in air: A review

Oxidation behaviour of AM50 magnesium alloy containing lanthanide elements

Effect of Ce addition on the high‐temperature oxidation resistance of Mg–Gd alloys

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