Effects of rare-earth elements Gd and Y on the solid solution strengthening of Mg alloys

Gao, Lian; Chen, Rongshi; Han, En‐Hou

doi:10.1016/j.jallcom.2009.02.131

Cited by 484 publications

(138 citation statements)

References 41 publications

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“…They also reported that these alloys have better elongation to fracture compared to other metallic implant materials like stainless steels, etc. Gao et al [27] studied the effects of Gd on the solid solution strengthening of Mg alloys. In this study, it was reported that Gd (due to size misfits and valency effects) is an effective solid solution strengthener in Mg as compared to Al and Zn.…”

Section: Gadoliniummentioning

confidence: 99%

Mechanical Properties of Magnesium-Rare Earth Alloy Systems: A Review

Tekumalla

Seetharaman

Almajid

2014

Metals

178

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Magnesium-rare earth based alloys are increasingly being investigated due to the formation of highly stable strengthening phases, activation of additional deformation modes and improvement in mechanical properties. Several investigations have been done to study the effect of rare earths when they are alloyed to pure magnesium and other Mg alloys. In this review, the mechanical properties of the previously investigated different magnesium-rare earth based binary alloys, ternary alloys and other higher alloys with more than three alloying elements are presented.

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Section: Gadoliniummentioning

confidence: 99%

Mechanical Properties of Magnesium-Rare Earth Alloy Systems: A Review

Tekumalla

Seetharaman

Almajid

2014

Metals

178

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“…In comparison with the standard α-Mg phase peak location (36.618 • ) [23], the α-Mg phase diffraction peaks location of SLMed AZ61 obviously shifted to high angles. Since atomic radii of Al (0.1199 nm) was 89.95% of Mg (0.1333 nm), Al acted as a substitutive solute in the α-Mg according to the theory of solid solution [24]. The incorporation of Al atoms into the α-Mg led to the lattice distortion, which increased the lattice parameter of the α-Mg [25].…”

Section: Phase and Dispersionmentioning

confidence: 99%

“…Since atomic radii of Al (0.1199 nm) was 89.95% of Mg (0.1333 nm), Al acted as a substitutive solute in the α-Mg according to the theory of solid solution [24]. The incorporation of Al atoms into the α-Mg led to the lattice distortion, which increased the lattice parameter of the α-Mg [25].…”

Section: Phase and Dispersionmentioning

confidence: 99%

Microstructure Evolution and Biodegradation Behavior of Laser Rapid Solidified Mg–Al–Zn Alloy

Bin

et al. 2017

Metals

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Abstract:The too fast degradation of magnesium (Mg) alloys is a major impediment hindering their orthopedic application, despite their superior mechanical properties and favorable biocompatibility. In this study, the degradation resistance of AZ61 (Al 6 wt. %, Zn 1 wt. %, remaining Mg) was enhanced by rapid solidification via selective laser melting (SLM). The results indicated that an increase of the laser power was beneficial for enhancing degradation resistance and microhardness due to the increase of relative density and formation of uniformed equiaxed grains. However, too high a laser power led to the increase of mass loss and decrease of microhardness due to coarsened equiaxed grains and a reduced solid solution of Al in the Mg matrix. In addition, immersion tests showed that the apatite increased with the increase of immersion time, which indicated that SLMed AZ61 possessed good bioactivity.

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“…The rare earth elements especially are a class of special elements which are known to be of major significance for improving the mechanical properties such as ductility, creep resistance, and casting characteristics [25][26][27][28][29][30]. For example, Gao et al [26] investigated the effects of rare earth elements Gd and Y on the solid solution strengthening of Mg alloys by using both the hardness and the tensile tests; they found that solid solution strengthening by Gd and Y is much higher than the effect of Al and Zn. Zhang et al [30] studied systematically the effects of RE (RE = Pr, Nd, Gd, Tb, and Dy) solute atoms on the stacking faults of Mg solid solutions using density functional theory; they found that the ductility of Mg is improved by the addition of RE atoms.…”

Section: Introductionmentioning

confidence: 99%

Temperature-Dependent Generalized Planar Fault Energy and Twinnability of Mg Microalloyed with Er, Ho, Dy, Tb, and Gd: First-Principles Study

Liu

et al. 2016

Advances in Materials Science and Engineering

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The generalized planar fault energies, Rice criterion ductility, and twinnability of pure Mg and Mg-RE (RE = Er, Ho, Dy, Tb, and Gd) alloys at different temperature have been investigated using density functional theory. It is shown that all the fault energies and twinnability in the same materials decrease with increasing temperature. However, the ductility has the opposite change trend. On the other hand, alloying rare earth elements will generally decrease the fault energies and increase the ductility and twinnability of Mg at different temperature. It is interesting to note that alloying larger atomic radius will enhance the ductility of Mg more easily and alloying smaller radius will make twinning tendency of Mg more easily. Finally, the electron structure further reveals the underlying mechanisms for the reduction of fault energies with the addition of rare earth elements.

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Effects of rare-earth elements Gd and Y on the solid solution strengthening of Mg alloys

Cited by 484 publications

References 41 publications

Mechanical Properties of Magnesium-Rare Earth Alloy Systems: A Review

Mechanical Properties of Magnesium-Rare Earth Alloy Systems: A Review

Microstructure Evolution and Biodegradation Behavior of Laser Rapid Solidified Mg–Al–Zn Alloy

Temperature-Dependent Generalized Planar Fault Energy and Twinnability of Mg Microalloyed with Er, Ho, Dy, Tb, and Gd: First-Principles Study

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