{"title":"Improvements in Microstructure, Mechanical and Degradation Properties of Mg-Y-Zn-Zr Alloy via Extrusion for Implant Applications.","authors":"Luo Xiaoping, Liu Baosheng, Hou Hua","doi":"10.1002/jemt.70038","DOIUrl":null,"url":null,"abstract":"<p><p>The microstructure and degradation behavior of a low-alloyed Mg-1.2Y-Zn-0.3Zr alloy were investigated for potential implant applications by permanent mold casting and hot extrusion. The phase composition and microstructure were characterized using scanning electron microscopy and X-ray diffraction. Degradation properties were investigated by using loss-weight tests and electrochemical measurements. The results show that the W-phase (Mg<sub>3</sub>Zn<sub>3</sub>Y<sub>2</sub>) exhibited segregation at the grain boundaries. Dynamic recrystallization significantly refined the alloy's grain structure. After hot extrusion, the average grain size was 2.96 μm, with tensile strength, elongation, and degradation rate values of 255 MPa, 27%, and 3.78 mm y<sup>-1</sup>, respectively, which implies that the enhanced mechanical and degradation properties are attributed to grain refinement and grain boundary segregation strengthening. This may provide a promising solution for implant material development.</p>","PeriodicalId":18684,"journal":{"name":"Microscopy Research and Technique","volume":" ","pages":""},"PeriodicalIF":2.1000,"publicationDate":"2025-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Microscopy Research and Technique","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1002/jemt.70038","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ANATOMY & MORPHOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
The microstructure and degradation behavior of a low-alloyed Mg-1.2Y-Zn-0.3Zr alloy were investigated for potential implant applications by permanent mold casting and hot extrusion. The phase composition and microstructure were characterized using scanning electron microscopy and X-ray diffraction. Degradation properties were investigated by using loss-weight tests and electrochemical measurements. The results show that the W-phase (Mg3Zn3Y2) exhibited segregation at the grain boundaries. Dynamic recrystallization significantly refined the alloy's grain structure. After hot extrusion, the average grain size was 2.96 μm, with tensile strength, elongation, and degradation rate values of 255 MPa, 27%, and 3.78 mm y-1, respectively, which implies that the enhanced mechanical and degradation properties are attributed to grain refinement and grain boundary segregation strengthening. This may provide a promising solution for implant material development.
研究了一种低合金Mg-1.2Y-Zn-0.3Zr合金在永模铸造和热挤压下的组织和降解行为。采用扫描电子显微镜和x射线衍射对其相组成和微观结构进行了表征。通过失重试验和电化学测量对其降解性能进行了研究。结果表明：w相（Mg3Zn3Y2）在晶界处出现偏析；动态再结晶使合金的晶粒组织明显细化。热挤压后，合金的平均晶粒尺寸为2.96 μm，抗拉强度为255 MPa，伸长率为27%，降解率为3.78 mm y-1，表明合金的力学性能和降解性能的增强是由于晶粒细化和晶界偏析强化所致。这可能为种植材料的开发提供了一个有前途的解决方案。
期刊介绍：
Microscopy Research and Technique (MRT) publishes articles on all aspects of advanced microscopy original architecture and methodologies with applications in the biological, clinical, chemical, and materials sciences. Original basic and applied research as well as technical papers dealing with the various subsets of microscopy are encouraged. MRT is the right form for those developing new microscopy methods or using the microscope to answer key questions in basic and applied research.
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