Effect of ECAP temperature on formation of triple heterogeneous microstructure and mechanical properties of Zn–1Cu alloy

Ren, Kangxuan; Zhang, Kaixiao; Zhang, Yue; Ju, Jia; Yan, Kai; Jiang, Jinghua; Ma, Aibin; Xue, Feng; Bai, Jing; Liu, Huan

doi:10.1016/j.msea.2021.141990

Cited by 28 publications

(12 citation statements)

References 60 publications

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“…The two factors mentioned above made grain boundary slid easier. Moreover, the precipitation zones in low-temperature processes (including cold working deformation) were considered soft domains, resulting in excellent ductility but low strength, 42 which was consistent with the results of the Zn-Cu wires studied in this paper. Figure 13 showed a schematic diagram of the deformation process of extruded and drawn Zn alloys, which illustrated the mechanism of the work softening.…”

Section: Discussionsupporting

confidence: 88%

Effect of Cu and Mg addition on the mechanical and degradation properties of Zn alloy wires

Cheng

Wang

et al. 2022

J Biomater Appl

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In this study, Zn-xCu (-0.1 Mg) wires with a diameter of 0.3 mm were obtained by hot extrusion and cold drawing. The microstructures, mechanical properties, and degradation behaviour were investigated to evaluate their feasibility as biodegradable metals. During the drawing process of the Zn-xCu alloys, many granular CuZn5 phases were dynamically precipitated, and the grains were significantly refined, along with a significant work softening with the tensile strength decreasing and the elongation increasing (from 161 MPa to 92 MPa and 22%–103% for Zn-0.2Cu). With the increase of Cu additions, the phenomenon of work softening was more intense and there was an opposite trend in the strength changes between the as-extruded rods (increase) and as-drawn wires (decrease). With 0.1 wt.% Mg added, the stable rod-like Mg2Zn11 phase was formed in as-extruded Zn-xCu-0.1 Mg rods, which obviously improved the strength, and inhibited the dynamic precipitation of granular CuZn5 phase and work softening phenomenon in the drawing process (from 332 MPa to 313 MPa and 11%–46% for Zn-0.2Cu-0.1 Mg). In addition, due to the micro-galvanic effect induced by the precipitates, alloying accelerated the degradation of Zn alloy wires, especially Zn-1Cu-0.1 Mg, which was related to the shape, distribution, and potential of the phases.

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Section: Discussionsupporting

confidence: 88%

Effect of Cu and Mg addition on the mechanical and degradation properties of Zn alloy wires

Cheng

Wang

et al. 2022

J Biomater Appl

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“…Developed Zn alloys exhibit high strength and elongation. For instance, Zn-Mg and Zn-Li based alloys have tensile strengths over 400 MPa, while Zn-Cu and Zn-Mn based alloys have elongations higher than 100% [8,10,11]. However, most Zn alloys exhibit strain softening, indicating non-uniform deformation during the tensile process.…”

Section: Introductionmentioning

confidence: 99%

Developing a Zn alloy with high strength and uniform elongation as a biomedical device

Chen,

Xiao,

et al. 2023

Mater. Res. Express

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The equal channel angular pressing (ECAP) process was used to develop a Zn-1Mg alloy with a tensile strength of 440 MPa and uniform elongation of 11%. The uniform elongation of the ECAPed Zn-1Mg alloy is higher than that of other Zn alloys with strengths over 400 MPa. The microstructure of the ECAPed Zn-1Mg alloy evolved through dynamic recrystallization (DRX), resulting in a refined grain structure. Additionally, the lamellar eutectic structure was fragmented into sub-micrometer particles (∼0.9 μm). The high strength of the Zn-1Mg alloy is due to both grain boundary strengthening and second phase strengthening. The high uniform elongation is attributed to the presence of plate-shaped precipitates with a high density of 1014m−2. The in-vitro results indicate that ECAPed Zn-1Mg alloy has high cell viability (>100%). Meanwhile, the Zn-1Mg alloy processed by ECAP exhibited better ALP activity and alizarin red results than pure Zn. These results demonstrate that Zn-1Mg alloy is beneficial to the proliferation and differentiation of osteoblasts, and also promote blood vascular formation. The good osteogenic and angiogenic properties of the alloy are attributed to the release of Mg2+ and Zn2+ during the degradation process, which play a critical role in biochemical reactions in the human body. Therefore, the high uniform elongation and good biological properties make Zn-Mg based alloys a promising material for expanding applications in the orthopedic field.

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“…which is mainly owing to the dynamic recrystallization (DRX) process and mechanical crushing effect occurring during the manufacture of multipass ECAP. In addition, Ren et al [30] obtained surprising mechanical properties of Zn-Cu alloys with heterostructure through ECAP process. Moreover, ECAP process is widely used to improve the properties of Mg alloy which is the same hexagonal close-packed (hcp) structure as Zn.…”

Section: Introductionmentioning

confidence: 99%

“…The studies on Zn alloys in recent years have been evaluated and summarized by David et al [ 28 ] Huang et al [ 29 ] reported that the yield strength Zn–Mg–Sr and Zn–Mg–Ca alloys could be improved up to 3 times using multipass equal‐channel angular pressing (ECAP) process, which is mainly owing to the dynamic recrystallization (DRX) process and mechanical crushing effect occurring during the manufacture of multipass ECAP. In addition, Ren et al [ 30 ] obtained surprising mechanical properties of Zn–Cu alloys with heterostructure through ECAP process. Moreover, ECAP process is widely used to improve the properties of Mg alloy which is the same hexagonal close‐packed (hcp) structure as Zn.…”

Section: Introductionmentioning

confidence: 99%

Investigation on the Mechanical and Corrosion Properties of ZnMnSr Alloys for Biodegradable Orthopedic Implants

et al. 2022

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Zinc‐based alloys with good biocompatibility and corrosion resistance are potential candidates for bioabsorbable implants. Herein, a series of Zn99−x Mn x Sr1 (x = 0.2, 0.3, 0.5, and 0.9 wt%) alloys are investigated using single‐channel vertical extrusion (SCVE) and equal‐channel angular pressing (ECAP) procedures, respectively. It is found that the amount of Mn significantly affects the mechanical properties of alloys. For example, the yield strength, tensile strength, and elongation of Zn–1Sr alloys can reach up to 204.73 ± 3.6 MPa, 244.04 ± 6.45 MPa, and 47.1 ± 3% with 0.99 wt% Mn addition after the SCVE process, which can meet the requirement of orthopedic implant applications. Moreover, the mechanical properties of current alloys are reduced with the combined SCVE + ECAP process, which may be due to more aggregation with the secondary phase within the matrix hcp(Zn). Furthermore, the polarization curves and immersion tests show that the corrosion rate is accelerated for the alloys processed with the combined SCVE + ECAP process (0.34–0.171 mm/y) compared with the ones processed only with SCVE (0.011–0.032 mm/y). The present finds provide a contribution for biodegradable Zn‐based alloys development.

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Effect of ECAP temperature on formation of triple heterogeneous microstructure and mechanical properties of Zn–1Cu alloy

Cited by 28 publications

References 60 publications

Effect of Cu and Mg addition on the mechanical and degradation properties of Zn alloy wires

Effect of Cu and Mg addition on the mechanical and degradation properties of Zn alloy wires

Developing a Zn alloy with high strength and uniform elongation as a biomedical device

Investigation on the Mechanical and Corrosion Properties of ZnMnSr Alloys for Biodegradable Orthopedic Implants

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