Microstructure, mechanical and corrosion properties of Mg–Dy–Gd–Zr alloys for medical applications

Yang, Lei; Huang, Yuanding; Feyerabend, Frank; Willumeit‐Römer, Regine; Mendis, C.L.; Kainer, Karl Ulrich; Hort, Norbert

doi:10.1016/j.actbio.2013.03.017

Cited by 100 publications

(46 citation statements)

References 53 publications

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“…The dissolubility of Dy in Mg at 520 • C is 22 wt. % [39]. However, rapid solidification introduced by quenching resulted in preserving the non-equilibrium conditions and the formation of phases and compositions slightly different from the assumptions made based on the phase diagrams [50].…”

Section: Discussionmentioning

confidence: 99%

“…Aluminium, a common alloying element, provides strengthening via solid solution and precipitation of secondary phases, especially Mg 17 Al 12 [18,19]. Additions of zinc lead to the formation of Mg-Zn Guinier-Preston zones and precipitation of MgZn x strengthening phases; by others (e.g., Mg-Dy-Gd-Zr [39], Mg-Dy-Zn [46,47], etc. ); the time of 16 h (double the first time period) was selected to observe possible structural changes after exposure to the identical temperature for a longer time.…”

Section: Introductionmentioning

confidence: 99%

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Comprehensive Characterisation of a Newly Developed Mg–Dy–Al–Zn–Zr Alloy Structure

Kunčická

Kocich

2018

Metals

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This is a report on the structure phases and precipitates in a newly developed Mg-10Dy-3Al-1Zn-0.2Zr alloy. Specimens from the cast alloy were heat treated at temperatures of 480 • C, 520 • C and 560 • C, all for 8 and 16 h, and subsequently quenched. The structures were then analysed using scanning and transmission electron microscopy, while the mechanical properties were investigated using microhardness measurements. The results showed the different temperatures, as well as times, influence both the chemical composition and morphology of the precipitated phases. The occurrence of the β-phase changed with increasing temperature and time from grain boundary segregations through fine elongated particles to coarse plate-like precipitates. Polygon-shaped Dy-rich precipitates were observed in all the samples; however, their size decreased and their distribution homogenised with increasing annealing temperature and time. The samples annealed at 520 • C and 560 • C exhibited the presence of lamellar 18R-type long period stacking ordered (LPSO) phases. Microhardness measurements were in accordance with results of the microscopic analyses; although the values varied between 60 and 65 HV for all the material states, the most uniform distribution was observed for the 560 • C/8-h sample, which featured the finest precipitates and LPSO phases.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Comprehensive Characterisation of a Newly Developed Mg–Dy–Al–Zn–Zr Alloy Structure

Kunčická

Kocich

2018

Metals

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“…In order to improve the corrosion resistance of such Mg alloys, this present research was carried out. Magnesium alloys containing particularly high solubility rare earth metals (RE) such Gd, Dy, Y, Nd, La, and Ce [11][12][13][14][15][16][17][18][19][20][21] have recently been studied. The distribution of these alloying elements in the Mg matrix was responsible for the change of the corrosion behavior of Mg alloys by the formation of new a corrosion resistant crystallographic β-phase [22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Effect of Gadolinium Content on the Corrosion Behavior of Magnesium Alloys in 1 wt.% NaCl Solution

Zidane¹,

Albrimi²,

Addi³

et al. 2015

Port. Electrochim. Acta

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The aim of this work was to study the effect of gadolinium content on the corrosion behavior of magnesium alloys in 1 wt.% NaCl solution at 21.5 (±0.5) °C. Four Mg-Gd alloys, namely Mg-2 wt.% Gd, Mg-5 wt.% Gd, Mg-10 wt.% Gd, and Mg-15 wt.% Gd, were studied. Weight loss measurements, potentiodynamic tests, electrochemical impedance spectroscopy, XR diffraction, and scanning electron microscopy combined with energy-dispersive X-ray spectroscopy (SEM-EDS) were performed on the four Mg-Gd samples. The results showed the influence of the Gd content on the corrosion behavior of these alloys in 1wt.% NaCl solution. The corrosion resistance of the Mg-Gd alloys was improved with the introduction of 10 wt.% Gd in Mg matrix. Thus, weight loss and electrochemical measurements revealed the better corrosion resistance for Mg-10 wt.% Gd alloy. Further addition of Gd exceeding 10 wt.% in a magnesium matrix reduces the corrosion resistance of Mg-alloy and induces an incremental increase in the corrosion rate.

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“…Therefore, Mg-Mn-Zn-Nd alloys are expected to provide better mechanical and corrosion properties than Mg-Zn and MgMn-Zn alloys for biomedical application. The bio-Mg alloys alloyed by RE elements, such as Mg-Y-Zn, 12) Mg-Dy-GdZr, 16) Mg-Nd-Y-Zr-Ca, 17) Mg-Y-Ca-Zr, 18) and Mg-Y-RE 19) alloys have been studied for biomedical applications. To the best knowledge of the authors, Mg-Zn-Mn-Nd alloys have not yet been studied for biomedical applications.…”

Section: Introductionmentioning

confidence: 99%

Effects of Nd on the Microstructures, Mechanical Properties and in Vitro Corrosion Behavior of Cast Mg-1Mn-2Zn-<i>x</i>Nd Alloys

Zhou

Luo

2015

Mater. Trans.

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Effects of neodymium (Nd) on the microstructures, mechanical properties, in vitro corrosion behavior, and cytotoxicity of as-cast Mg1Mn-2Zn-xNd alloys (x = 0.5, 1.0, 1.5, mass%) have been investigated to assess whether Nd is an effective element to increase the strength and corrosion resistance of Mg alloys, and to evaluate whether those alloys are suitable for biomedical applications. The microstructures were examined by X-ray diffraction analysis and optical microscopy. The mechanical properties were determined from uniaxial tensile and compressive tests. The corrosion behavior was studied using electrochemical measurement and cytotoxicity was evaluated using osteoblast-like SaOS2 cell. The results indicate that all the cast Mg-1Mn-2Zn-xNd alloys are composed of both alpha phase of magnesium (Mg) and a compound of Mg 7 Zn 3 , and their grain sizes decrease with Nd content. Nd is not an effective element to improve the strength and corrosion resistance of cast Mg-Mn-Zn alloys. Increase of Nd content from 0.5 to 1.5 does not significantly change biocompatibility of alloys. The cast alloys exhibit much better corrosion resistance than pure Mg and good biocompatibility.

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Microstructure, mechanical and corrosion properties of Mg–Dy–Gd–Zr alloys for medical applications

Cited by 100 publications

References 53 publications

Comprehensive Characterisation of a Newly Developed Mg–Dy–Al–Zn–Zr Alloy Structure

Comprehensive Characterisation of a Newly Developed Mg–Dy–Al–Zn–Zr Alloy Structure

Effect of Gadolinium Content on the Corrosion Behavior of Magnesium Alloys in 1 wt.% NaCl Solution

Effects of Nd on the Microstructures, Mechanical Properties and in Vitro Corrosion Behavior of Cast Mg-1Mn-2Zn-<i>x</i>Nd Alloys

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