Phase Formation of Mg-Zn-Gd Alloys on the Mg-rich Corner

Li, Luo; Liu, Yong; Duan, Meng

doi:10.3390/ma11081351

Cited by 13 publications

(3 citation statements)

References 49 publications

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“…The intermetallic Mg 3 Zn 3 Gd 2 phase was observed only after 4 ECAP passes. The Mg 3 Gd phase normally shows a face-centered cubic structure like the W-phase having a lattice parameter of a = 0.74 nm [35,36]. The ne-grained microstructure observed after 4 ECAP passes is attributed to the high thermal stability of this Mg 3 Gd phase [37], which prevents grain coarsening during heating and processing of the sample by ECAP (Fig.…”

Section: Microstructure Of Ecap Ze41 Mg Alloymentioning

confidence: 99%

WITHDRAWN: Effect of equal channel angular pressing route and temperature on the mechanical behavior of ZE41 Mg alloy

Chiranth¹,

Siddaraju²,

Sevvel³

et al. 2021

Preprint

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A commercial ZE41 Mg alloy was processed by equal channel angular pressing (ECAP) using route BC (90o sample rotation after each pass) and route C (180o sample rotation after each pass) at 250, 300 and 350 oC for up to 4 passes. Significant grain refinement from ∼150 μm to ∼33 μm occurred at the higher third and fourth ECAP passes. The most effective process among all routes and temperature combinations was via route C at 250 oC. Nearly 83% increase in yield strength, 58% increase in ultimate tensile strength, and 107% increase in fracture strain were observed after 4 ECAP passes using route C at 250 oC. The increase in the strength of the alloy was attributed to grain refinement during static and dynamic recrystallization. Fractography of tensile samples showed that shallow dimples change to fine dimples at higher passes modifying the failure mode from cleavage to ductile fracture.

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Section: Microstructure Of Ecap Ze41 Mg Alloymentioning

confidence: 99%

WITHDRAWN: Effect of equal channel angular pressing route and temperature on the mechanical behavior of ZE41 Mg alloy

Chiranth¹,

Siddaraju²,

Sevvel³

et al. 2021

Preprint

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“…These ternary phases are the W-phase (Mg 3 Zn 3 Gd 2 ), I-phase (Mg 3 Zn 6 Gd), and X-phase (Mg 12 ZnGd) [25][26][27]. The W-phase is the most prevalent phase among them, occurring when the ratio of Zn to Gd is below 6 [28]. Furthermore, it was reported that when the atomic ratio of Zn to Gd was in the range from 1.5 to 40, the I-phase could form together with the W-phase [29].…”

Section: Microstructure Of the As-cast And Homogenized Alloysmentioning

confidence: 99%

Evolution of Microstructure, Mechanical Properties, and Corrosion Resistance of Mg–2.2Gd–2.2Zn–0.2Ca (wt%) Alloy by Extrusion at Various Temperatures

Zengin

Ari²,

Turan

et al. 2023

Materials

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The current investigation involved casting the Mg–2.2Gd–2.2Zn–0.2Ca (wt%) alloy (GZX220) through permanent mold casting, followed by homogenization at 400 °C for 24 h and extrusion at 250 °C, 300 °C, 350 °C, and 400 °C. Microstructure investigations revealed that α-Mg, Mg–Gd, and Mg–Gd–Zn intermetallic phases were present in the as-cast alloy. Following the homogenization treatment, a majority of these intermetallic particles underwent partial dissolution into the matrix phase. α-Mg grains exhibited a considerable refinement by extrusion due to dynamic recrystallization (DRX). At low extrusion temperatures, higher basal texture intensities were observed. The mechanical properties were remarkably enhanced after the extrusion process. However, a consistent decline in strength was observed with the rise in extrusion temperature. The corrosion performance of the as-cast GZX220 alloy was reduced by homogenization because of the lack of corrosion barrier effect of secondary phases. A significant enhancement of corrosion resistance was achieved by the extrusion process.

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“…In the past, alloying of safe elements, such as zinc (Zn), aluminium (Al), silver (Ag), yttrium (Y), zirconium (Zr), neodymium (Nd), silicon (Si), manganese (Mn), titanium dioxide (TiO 2 ), and calcium (Ca), were selected in response to increase the corrosion resistance and biological function of Mg [ 11 , 12 , 13 , 14 , 15 , 16 , 17 ]. Although the element Al in Mg composites improves mechanical properties, released Al + ions cause Alzheimer’s disease and muscle fiber damage [ 18 , 19 , 20 ]. It was reported that Zr causes very serious diseases, such as liver, lung, and breast cancer [ 21 ].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Characterization, Corrosion Resistance and In-Vitro Bioactivity Behavior of Biodegradable Mg–Zn–Mn–(Si–HA) Composite for Orthopaedic Applications

et al. 2018

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Recently, magnesium (Mg) has gained attention as a potential material for orthopedics devices, owing to the combination of its biodegradability and similar mechanical characteristics to those of bones. However, the rapid decay rate of Mg alloy is one of the critical barriers amongst its widespread applications that have provided numerous research scopes to the scientists. In this present, porous Mg-based biodegradable structures have been fabricated through the hybridization of elemental alloying and spark plasma sintering technology. As key alloying elements, the suitable proportions of silicon (Si) and hydroxyapatite (HA) are used to enhance the mechanical, chemical, and geometrical features. It has been found that the addition of HA and Si element results in higher degree of structural porosity with low elastic modulus and hardness of the Mg–Zn–Mn matrix, respectively. Further, addition of both HA and Si elements has refined the grain structure and improved the hardness of the as-fabricated structures. Moreover, the characterization results validate the formation of various biocompatible phases, which enhances the corrosion performance and biomechanical integrity. Moreover, the fabricated composites show an excellent bioactivity and offer a channel/interface to MG-63 cells for attachment, proliferation and differentiation. The overall results of the present study advocate the usefulness of developed structures for orthopedics applications.

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Phase Formation of Mg-Zn-Gd Alloys on the Mg-rich Corner

Cited by 13 publications

References 49 publications

WITHDRAWN: Effect of equal channel angular pressing route and temperature on the mechanical behavior of ZE41 Mg alloy

WITHDRAWN: Effect of equal channel angular pressing route and temperature on the mechanical behavior of ZE41 Mg alloy

Evolution of Microstructure, Mechanical Properties, and Corrosion Resistance of Mg–2.2Gd–2.2Zn–0.2Ca (wt%) Alloy by Extrusion at Various Temperatures

Synthesis, Characterization, Corrosion Resistance and In-Vitro Bioactivity Behavior of Biodegradable Mg–Zn–Mn–(Si–HA) Composite for Orthopaedic Applications

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