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塑性变形对Zn-4Ag-1Cu锌合金组织和力学性能的影响

Effect of Plastic Deformation on the Structure and Mechanical Properties of the Zn-4Ag-1Cu Zinc Alloy.

作者信息

Khafizova Elvira, Fakhretdinova Elvira, Islamgaliev Rinat, Polenok Milena, Sitdikov Vil, Yilmazer Hakan

机构信息

Institute of Physics of Advanced Materials, Ufa University of Science and Technology, 450076 Ufa, Russia.

Institute of Molecules and Crystal Physics, Ufa Federal Research Center of the Russian Academy of Sciences, 450075 Ufa, Russia.

出版信息

Materials (Basel). 2023 Jun 27;16(13):4646. doi: 10.3390/ma16134646.

DOI:10.3390/ma16134646
PMID:37444960
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10342878/
Abstract

It is known that zinc biodegradable alloys are a promising material for producing biomedical implants for orthopedics and vascular stents. Among them, the Zn-Ag-Cu zinc alloy is of special interest due to the antibacterial and antimicrobial properties of Ag and Cu. To improve the mechanical properties of the Zn-4Ag-1Cu zinc alloy, the effect of equal-channel angular pressing (ECAP) on the microstructure and strength has been investigated. The ECAP conditions for the Zn-4Ag-1Cu alloy were chosen by modeling in the Deform 3 D program (temperature and strain rate). The microstructure was analyzed using transmission electron microscopy, scanning electron microscopy and X-ray diffraction analysis. The study of strength was carried out by measuring the microhardness and tensile tests of small samples with a gauge dimension of 0.8 × 1 × 4 mm. The microstructure after ECAP was characterized by equiaxed grains ranging in a size from 1.5 µm to 4 µm with particles in a size from 200 nm to 1 µm uniformly distributed along the boundaries. The ECAP samples showed a high strength of 348 MPa and good ductility of up to 30%, demonstrating their great potential as promising materials for producing medical stents.

摘要

众所周知，锌基可生物降解合金是用于制造骨科生物医学植入物和血管支架的一种很有前景的材料。其中，Zn-Ag-Cu锌合金因其Ag和Cu的抗菌性能而备受关注。为了提高Zn-4Ag-1Cu锌合金的力学性能，研究了等通道转角挤压（ECAP）对其微观结构和强度的影响。通过在Deform 3D程序中进行模拟（温度和应变速率）来选择Zn-4Ag-1Cu合金的ECAP条件。使用透射电子显微镜、扫描电子显微镜和X射线衍射分析对微观结构进行分析。通过测量尺寸为0.8×1×4 mm的小样品的显微硬度和拉伸试验来进行强度研究。ECAP后的微观结构特征是等轴晶粒，尺寸范围为1.5 µm至4 µm，尺寸为200 nm至1 µm的颗粒沿晶界均匀分布。ECAP样品显示出348 MPa的高强度和高达30%的良好延展性，证明了它们作为生产医疗支架的有前景材料的巨大潜力。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cb7e/10342878/dac99210695f/materials-16-04646-g013.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cb7e/10342878/85801c0a4acf/materials-16-04646-g008.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cb7e/10342878/dac99210695f/materials-16-04646-g013.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cb7e/10342878/6bb1485d8b44/materials-16-04646-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cb7e/10342878/1d91d2a82d36/materials-16-04646-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cb7e/10342878/5247b4b082fb/materials-16-04646-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cb7e/10342878/176224085445/materials-16-04646-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cb7e/10342878/f246282c4ba1/materials-16-04646-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cb7e/10342878/55f3d40c3a5e/materials-16-04646-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cb7e/10342878/85801c0a4acf/materials-16-04646-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cb7e/10342878/56664893f3d7/materials-16-04646-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cb7e/10342878/af1f1be6e595/materials-16-04646-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cb7e/10342878/f94029b51c4b/materials-16-04646-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cb7e/10342878/c9a8c10a6ad6/materials-16-04646-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cb7e/10342878/dac99210695f/materials-16-04646-g013.jpg

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