The Effect of Solid Solute and Precipitate Phase on Young's Modulus of Binary Mg–RE Alloys

Xu, Yan; Wang, Li; Huang, Meng; Gensch, Felix; Kainer, Karl Ulrich; Hort, Norbert

doi:10.1002/adem.201800271

Cited by 23 publications

(6 citation statements)

References 43 publications

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“…Mg also plays an important role in the synthesis of proteins and nucleic acid, the integrity of mitochondria and enzymes, the stabilization of biological membranes, and the modulation of transport functions [ 12 , 18 , 19 ]. The elastic modulus of Mg is ~45 GPa [ 20 , 21 , 22 , 23 ], which is close to the value of cancellous bone (10–30 GPa). Mg is also lightweight and exhibits a high strength-to-weight ratio.…”

Section: Introductionmentioning

confidence: 56%

Corrosion Behavior in Magnesium-Based Alloys for Biomedical Applications

Liu

Sun

et al. 2022

Materials

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Magnesium alloys exhibit superior biocompatibility and biodegradability, which makes them an excellent candidate for artificial implants. However, these materials also suffer from lower corrosion resistance, which limits their clinical applicability. The corrosion mechanism of Mg alloys is complicated since the spontaneous occurrence is determined by means of loss of aspects, e.g., the basic feature of materials and various corrosive environments. As such, this study provides a review of the general degradation/precipitation process multifactorial corrosion behavior and proposes a reasonable method for modeling and preventing corrosion in metals. In addition, the composition design, the structural treatment, and the surface processing technique are involved as potential methods to control the degradation rate and improve the biological properties of Mg alloys. This systematic representation of corrosive mechanisms and the comprehensive discussion of various technologies for applications could lead to improved designs for Mg-based biomedical devices in the future.

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Section: Introductionmentioning

confidence: 56%

Corrosion Behavior in Magnesium-Based Alloys for Biomedical Applications

Liu

Sun

et al. 2022

Materials

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“…The measured Young's modulus during heating and cooling test cycles fit well with each other. The room temperature Young's modulus of the alloy is 43.7 GPa, and it is in the normal range of 40-50 GPa ambient Young's modulus that is generally expected for cast Mg alloys [40,41] With the increase of temperature from room temperature to the elevated temperature of 300 °C, the thermal conductivity of the alloy increases to 124 W/m•K.…”

Section: Ambient and Elevated Modulusmentioning

confidence: 85%

Development of an Mg–RE-Based Die-Cast Magnesium Alloy for Elevated Applications

Dong

Feng

Nyberg³

et al. 2021

The Minerals, Metals &Amp; Materials Series

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The development of magnesium (Mg) alloys capable of operating at the demanding working temperature of above 200 °C and the ability of using high pressure die casting for high-volume manufacturing are the most advanced development in manufacturing critical parts for internal combustion (IC) engines used in power tools. Here we introduce the development of a Mg-RE based die-cast Mg alloy for elevated applications in small IC engines. The developed Mg-RE based die-cast Mg alloy shows good ambient and high temperature strength, and it also has excellent high temperature creep resistance. In addition, the developed Mg-RE based die-cast Mg alloy shows good stiffness at elevated temperatures. Furthermore, the developed Mg-RE based die-cast Mg alloy exhibits good thermal conductivity at ambient and high temperatures, which is a key point that is normally neglected during the development of high temperature Mg alloys.

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“…After T4 treatment, only the equilibrium second phase Mg 41 Nd 5 was identified. Notably, our previous work [39] demonstrated that in the as-extruded Mg-5Nd alloy the second phase is Mg 41 Nd 5 rather than Mg 12 Nd. Before the present Mg-5Nd alloy was extruded at high temperature 450°C, a homogenization treatment was performed at 440°C.…”

Section: A Microstructurementioning

confidence: 96%

“…Our previous work indicated that after hot extrusion the stable Mg 41 Nd 5 phase exists in Mg-5Nd alloy. [39] The reason for choosing such a content of 5 wt pct Nd, which is slightly higher than the limit of solid solubility at Mg-Nd eutectic temperature, is to retain a part of undissolved stable Mg 41 Nd 5 phase after solid solution treatment. In addition, it offers chances to modify both the phase types and distributions of intermetallics using heat treatments.…”

Section: Introductionmentioning

confidence: 99%

Effects of Intermetallic Microstructure on Degradation of Mg-5Nd Alloy

Zhang

Huang

Feyerabend

et al. 2020

Metall Mater Trans A

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The influence of intermetallic microstructure on the degradation of Mg-5Nd alloy with different heat treatments was investigated via immersion testing in DMEM + 10 pct FBS under cell culture conditions and subsequent microstructural characterizations. It was found that T4 heat-treated sample had the poorest corrosion resistance due to the lack of finely dispersed precipitates inside grains, continuous lamellar particles along grain boundaries and outer Ca-P layer, and to the formation of a loose corrosion product layer. In contrast, the aged samples exhibited a better corrosion resistance due to their presence and to the formation of a compact corrosion layer. Their degradation behavior largely depended on the intermetallic microstructure. Corrosion was initiated in the matrix around stable globular particles Mg41Nd5 at grain boundaries. In the sample aged at high temperature 245 °C, the coexistence of lamellar Mg41Nd5 particles and their nearby Nd-poor regions enhanced the corrosion. The corrosion first started in such regions. It was shown that those finely dispersed precipitates formed during aging had no influence on the corrosion initiation. However, they indeed affected the subsequent corrosion propagation with the immersion proceeding. They supplied barriers for corrosion propagation and hence were beneficial for improving the corrosion resistance. The continuously distributed lamellar Mg41Nd5 precipitates formed at grain boundaries during aging at 245 °C supplied an additional effective obstacle to corrosion propagation. This was especially beneficial for hindering the corrosion propagation at the later stage of corrosion.

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The Effect of Solid Solute and Precipitate Phase on Young's Modulus of Binary Mg–RE Alloys

Cited by 23 publications

References 43 publications

Corrosion Behavior in Magnesium-Based Alloys for Biomedical Applications

Corrosion Behavior in Magnesium-Based Alloys for Biomedical Applications

Development of an Mg–RE-Based Die-Cast Magnesium Alloy for Elevated Applications

Effects of Intermetallic Microstructure on Degradation of Mg-5Nd Alloy

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