Effect of Yttrium on High Temperature Strength of Magnesium

Chang, Sun O; Nakagaido, Tatsuya; Hong, Seung‐Eun; Shin, Dong Hyuk; Sato, Tatsuo

doi:10.2320/matertrans.42.1332

Cited by 22 publications

(6 citation statements)

References 12 publications

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“…Recent studies on the effects of rare-earth (RE) elements, such as Gd [6][7][8][9][10][11][12], Y [6,9,10,[13][14][15][16][17][18][19][20][21][22][23], Ce [6,14,15,[24][25][26], La [6,14,15,26], and Nd [6,14,15,[20][21][22][23]27] on the Mg alloys suggest that the Mg-RE alloys exhibit weakened initial texture, improved ductility, and enhanced strength as compared with the conventional Mg alloys. Such advantages are encouraging for Mg-RE alloys for the application as load-bearing structural components.…”

Section: Introductionmentioning

confidence: 99%

Cyclic deformation and fatigue of extruded Mg–Gd–Y magnesium alloy

Wang

Dong

Jiang

et al. 2013

Materials Science and Engineering: A

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Section: Introductionmentioning

confidence: 99%

Cyclic deformation and fatigue of extruded Mg–Gd–Y magnesium alloy

Wang

Dong

Jiang

et al. 2013

Materials Science and Engineering: A

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“…It is noteworthy that although the 0Zn alloy exhibits tensioncompression yielding asymmetry, the difference between TYS and CYS is much smaller than conventional wrought Mg alloys, such as AZ31, [32] which is mainly due to the strong inhibition effect of Gd an Y elements on tensile twinning. [8,33,34] It is proposed that the large atomic radius of REs may restrict the atomic shuffling process which is required for the twinning shear, thus imposing strong hardening on the tensile twinning. [34] Furthermore, alloying of REs can narrow the difference of CRSS between various deformation modes, which is found to suppress twin thickening and twin transmission.…”

Section: Discussionmentioning

confidence: 99%

Effects of Trace Zn on the Deformation Mechanisms of Mg–Gd–Y–Zr Alloy Investigated by In Situ Synchrotron Diffraction

Liu,

Dai,

Liu

et al. 2024

Adv Eng Mater

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Addition of trace Zn can impose notable effect on the deformation behavior of Mg‐Gd‐Y‐Zr alloy, while the underlying mechanisms have not been revealed. In the present work, Mg‐8.5Gd‐2.5Y‐0.3Zr (wt%) (0Zn) and Mg‐8.5Gd‐2.5Y‐0.5Zn‐0.3Zr (wt%) (0.5Zn) alloys were fabricated by casting and extrusion, to obtain a bimodal microstructure containing fine DRXed grains and coarse unDRXed grains. The as‐extruded 0Zn and 0.5Zn alloys were studied by in‐situ synchrotron diffraction under uniaxial tension and compression to clarify the effect of trace Zn on the deformation mechanisms. It is found that both alloys exhibit stress softening in the basal slip favored grains under both tension and compression, and adding trace Zn highly enhances the stress softening. Furthermore, the addition of Zn stimulates the occurrence of discontinuous yielding which is in connection with the stress softening, resulting from the interaction between basal dislocations and solute atmospheres. The tension‐compression yielding symmetry of the alloy is improved by adding Zn, which is mainly attributed to the suppression effect of γ’ phases and Gd/Y‐Zn dimers on tensile twinning. Finally, the addition of Zn can promote the tensile and compressive strength, owing to the strength enhancement of the relevant deformation modes and the increase of the fraction of unDRXed regions.This article is protected by copyright. All rights reserved.

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“…Because the slip and twining in HCP metals may be related to the axis ratio, c/a. Nonbasal slip hardly occurs when the c/a is large, whereas at high temperature, where the c/a becomes lower, the nonbasal slip can occur [18,19]. This phenomenon has been reported in Mg-Y alloys [19].…”

Section: Effect Of Gd Dy and Y On Lattice Parameters In Mgmentioning

confidence: 90%

Comparison of the Solid Solution Properties of Mg‐RE (Gd, Dy, Y) Alloys with Atomistic Simulation

2008

Physics Research International

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Molecular dynamic simulations have been performed to study the solid solution mechanism of Mg100-xREx (RE=Gd,Dy,Y, x=0.5,1,2,3,4 at.%). The obtained results reveal that the additions of Gd, Dy and Y increase the lattice constants of Mg-RE alloys. Also the axis ratio c/a remains unchanged with increase in temperature, restraining the occurrence of nonbasal slip and twinning. Furthermore, it is confirmed that bulk modulus of Mg alloys can be increased remarkably by adding the Gd, Dy, Y, especially Gd, because the solid solubility of Gd in Mg decrease sharply with temperature in comparison with Dy and Y. Consequently, the addition of the RE can enhance the strength of Mg-based alloys, which is in agreement with the experimental results.

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Effect of Yttrium on High Temperature Strength of Magnesium

Cited by 22 publications

References 12 publications

Cyclic deformation and fatigue of extruded Mg–Gd–Y magnesium alloy

Cyclic deformation and fatigue of extruded Mg–Gd–Y magnesium alloy

Effects of Trace Zn on the Deformation Mechanisms of Mg–Gd–Y–Zr Alloy Investigated by In Situ Synchrotron Diffraction

Comparison of the Solid Solution Properties of Mg‐RE (Gd, Dy, Y) Alloys with Atomistic Simulation

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