“…We are aware that the strength of the prepared wires can be low and insufficient for surgical application. However, suitable alloying-for example, with magnesium-should allow significantly higher strengths to be achieved [39]. In general, suitable alloying leads to pinning of the grain boundaries and the achievement finer grain sizes after the extrusion.…”
In this study, we prepared zinc wires with a diameter of 250 µm by direct extrusion using an extrusion ratio of 576. We studied the influence of the extrusion temperature and microstructure of the initial Zn billets on the microstructural and mechanical characteristics of the extruded wires. The extrusion temperature played a significant role in the final grain size. The wires extruded at 300 °C possessed a coarse-grained microstructure and the shape of their tensile stress–strain curves suggested that twinning played an important role during their deformation. A significant influence of the initial grain size on the final microstructure was observed after the extrusion at 100 °C. The wires prepared from the billet with a very coarse-grained microstructure possessed a bimodal grain size. A significant coarsening of their microstructure was observed after the tensile test. The wires prepared from the medium-grained billets at 100 °C were relatively coarse-grained, but their grain size was stable during the straining, resulting in the highest ultimate tensile strength. This preliminary study shows that strong attention should be paid to the extrusion parameters and the microstructure of the initial billets, because they significantly influence the microstructure and mechanical behavior of the obtained wires.
“…We are aware that the strength of the prepared wires can be low and insufficient for surgical application. However, suitable alloying-for example, with magnesium-should allow significantly higher strengths to be achieved [39]. In general, suitable alloying leads to pinning of the grain boundaries and the achievement finer grain sizes after the extrusion.…”
In this study, we prepared zinc wires with a diameter of 250 µm by direct extrusion using an extrusion ratio of 576. We studied the influence of the extrusion temperature and microstructure of the initial Zn billets on the microstructural and mechanical characteristics of the extruded wires. The extrusion temperature played a significant role in the final grain size. The wires extruded at 300 °C possessed a coarse-grained microstructure and the shape of their tensile stress–strain curves suggested that twinning played an important role during their deformation. A significant influence of the initial grain size on the final microstructure was observed after the extrusion at 100 °C. The wires prepared from the billet with a very coarse-grained microstructure possessed a bimodal grain size. A significant coarsening of their microstructure was observed after the tensile test. The wires prepared from the medium-grained billets at 100 °C were relatively coarse-grained, but their grain size was stable during the straining, resulting in the highest ultimate tensile strength. This preliminary study shows that strong attention should be paid to the extrusion parameters and the microstructure of the initial billets, because they significantly influence the microstructure and mechanical behavior of the obtained wires.
Section: Prospects For Biological Matching Spine Fusion Cage Developmentmentioning
confidence: 99%
“… Fig. 11 A. Mg based coronary artery stent, Zong et al [ 276 ], copyright 2022, ELSVIER, Creative Commons Attribution License; B. Mg wire induced nerve regeneration, Vennemeyer et al [ 280 ], copyright 2015, SAGE; C. Mg wire ligated bladder, Okamura et al [ 281 ], copyright 2021, Springer; D. Mg wire ligated urinary tract, Chang et al [ 282 ], copyright 2020, MDPI, Creative Commons Attribution License; E. Mg wire used for hepatectomy, Urade et al [ 279 ], copyright 2019, BMC, Creative Commons Attribution 4.0 International License; F. Mg wire anastomosed intestine, Zhang et al [ 277 ], copyright 2023, Ke Ai, Creative Commons Attribution License; G. Mg wire used for cholecystectomy, Yoshida et al [ 278 ], copyright, 2017, ELSEVIER; H. Mg wire weaving ACL tendon graft in reconstruction surgery, He et al [ 62 , 91 ], copyright 2022, MDPI, Creative Commons Attribution License and 2024, Ke Ai, Creative Commons Attribution License; I. Mg based scaffold based on Mg wire to treat defect, Xue et al [ 283 ], copyright 2022, IOP, Creative Commons Attribution License. …”
Section: Prospects For Biological Matching Spine Fusion Cage Developmentmentioning
“…Guo et al [ 27 ] reported pure Zn wire for suture application. Zn-Mg alloys with a diameter of 0.6 mm have been developed for urinary tract surgeries [ 28 ]. BM fine wire with a diameter of less than 0.5 mm showed huge potentials in medical applications [ 26 ].…”
Zn and Zn-based alloys exhibit biosafety and biodegradation, considered as candidates for biomedical implants. Zn-0.02 wt.% Mg (Zn-0.02 Mg), Zn-0.05 wt.% Mg (Zn-0.05 Mg), and Zn-0.2 wt.% Mg (Zn-0.2 Mg) wires (Φ 0.3 mm) were prepared for precision biomedical devices in this work. With the addition of Mg in Zn-xMg alloys, the grain size decreased along with the occurrence of Mg2Zn11 at the grain boundaries. Hot extrusion, cold drawing, and annealing treatment were introduced to further refining the grain size. Besides, the hot extrusion and cold drawing improved the tensile strength of Zn-xMg alloys to 240-270 MPa while elongation also increased but remained under 10%. Annealing treatment could improve the elongation of Zn alloys to 12% -28%, but decrease the tensile strength. Furthermore, Zn-xMg wires displayed an increase in degradation rate with Mg addition. The findings might provide a potential possibility of Zn-xMg alloy wires for biomedical applications.
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