Thermal stability and corrosion behaviour of Mg–Y–Nd and Mg–Tb–Nd alloys

Neubert, Volkmar; Stulı́ková, Ivana; Smola, Bohumil; Mordike, B. L.; Vlach, Martin; Bakkar, Ashraf; Pelcová, Jitka

doi:10.1016/j.msea.2005.11.077

Cited by 65 publications

(23 citation statements)

References 9 publications

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“…In last decade, Mg has been alloyed with various RE elements to develop new Mg alloys with better mechanical properties, formability and creep resistance at high temperatures [6,[120][121][122][123][124][125]. The oxidation resistance of Mg alloys may also be enhanced by alloying with RE elements [126][127][128].…”

Section: Re Elementsmentioning

confidence: 99%

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: Re Elementsmentioning

confidence: 99%

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

et al. 2016

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“…Rare earth (RE) elements are known to improve the high temperature oxidation resistance [4,5] and creep resistance of magnesium alloys, which in some cases is acceptable for temperatures above 200°C [6][7][8]. For this reason, Mg-RE are considered as one of the most important candidates for powertrain applications [9].…”

Section: Introductionmentioning

confidence: 99%

Oxidation Behavior of AZ91D Magnesium Alloy Containing Nd or Gd

et al. 2011

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The influence of Nd and Gd additions on the evolution of microstructure, surface hardness and oxidation behavior of the extruded AZ91D magnesium alloy exposed to air was investigated in the temperature range from 290 to 410°C. The kinetics of the oxidation process was obtained from gravimetric measurements performed during 28 days. Nd and Gd formed Al-rich intermetallic compounds (Al 2 Gd, Al 2 Nd, Al-Mn-Gd and Al-Mn-Nd) and reduced the volume fraction of b-Mg 17 Al 12 phase. Surface degradation of the AZ91D alloy, with and without Gd or Nd, was negligible for temperatures below 370°C. At 410°C, the grain size and oxidation rate significantly increased, although lanthanide-containing alloys revealed lower degradation compared with the unmodified AZ91D alloy.

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“…The binary and multiple intermetallic compounds formed by yttrium (Y) and rare earth metals (RE) with magnesium matrix can greatly improve the mechanical properties of magnesium alloys at both room and elevated temperatures [1][2][3][4][5][6][7][8]. It has been reported that the Mg-Y-RE-Zr alloys such as Mg-9Gd-4Y-0.6Zr and Mg-3Y-4RE exhibit higher specific combination properties than conventional Al and Mg alloys, and their ultimate tensile strength, yield strength, and elongation could reach about 400 MPa, 300 MPa, and 10%, respectively [9][10][11][12][13][14][15]. In this study, four kinds of Mg-Y-RE-Zr alloys with variable neodymium (Nd) content were prepared and treated by homogenization, hot extrusion and ageing respectively.…”

Section: Introductionmentioning

confidence: 99%

Microstructural evolution and mechanical properties of Mg-5Y-5Gd-xNd-0.5Zr magnesium alloys at different states

Zhang

et al. 2010

Rare Metals

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The microstructural evolution and mechanical properties of Mg-5Y-5Gd-xNd-0.5Zr magnesium alloys at different states were studied. The results reveal that island compounds at the grain boundaries of the as-cast alloys mainly were Mg 24 Y 5 , Mg 41 Nd 5 , and Mg 5 Gd phases. After homogenization at 808 K for 24 h, the distribution of the island compounds became discrete and Mg 5 Gd phases mostly decomposed and dissolved. With hot extrusion, the grain size was refined to about 20 μm on average, and both the strength and elongation were greatly improved. After ageing at 523 K for 5 h, the strength of different extruded alloys largely increased but the elongation decreased. With the increase of neodymium content, the strength of the alloys at different states increased. The content of neodymium element had an obvious effect on the elongation of the designed alloys. In the designed alloys, the Mg-5Y-5Gd-2.2Nd-0.5Zr alloy exhibited the best combination properties and its ultimate tensile strength, yield strength, and elongation could reach 380 MPa, 285 MPa, and 9.0%, respectively.

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Thermal stability and corrosion behaviour of Mg–Y–Nd and Mg–Tb–Nd alloys

Cited by 65 publications

References 9 publications

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

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

Oxidation Behavior of AZ91D Magnesium Alloy Containing Nd or Gd

Microstructural evolution and mechanical properties of Mg-5Y-5Gd-xNd-0.5Zr magnesium alloys at different states

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