Transactions of Materials and Heat Treatment

Title：Effect of equal channel angular pressing on microstructure and corrosion property of Mg-4Zn-1Mn-0. 2Ca alloy

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ClassificationCode：TG379

year,vol(issue):pagenumber：2023,48(1):103-107

Abstract：

The influences of equal channel angular pressing (ECAP) on the microstructure and corrosion property of biomedical Mg-4Zn-1Mn-0. 2Ca alloy were investigated. Then, Mg-4Zn-1Mn-0. 2Ca alloy was subjected to eight passes of equal channel angular pressing deformation to obtain the alloys in different states, and the microstructures of the samples in three states were observed. Furthermore, the minimum grain size of the alloy after eight-pass deformation was 10. 52 μm, and the microstructure was more uniform. The corrosion rate of the alloy in the simulated body fluid (SBF) was measured by immersion experiment, and the corrosion rate of the alloy by eight-pass deformation was the lowest at 1. 897 mm·y-1. Moreover, the change of the corrosion behavior for the alloy after the ECAP deformation was analyzed by electrochemical experiment. The results show that after ECAP deformation, the grains of extruded Mg-4Zn-1Mn-0. 2Ca magnesium alloy are gradually refined and the microstructure is more uniform. With the increasing of extrusion pass, the local impedance of the alloy in SBF is gradually increased, and the corrosion resistance is improved.

Funds：

山西省自然科学基金资助项目(201901D111104);山西省国际合作项目(201903D421076)

作者简介: 虞佳雯(1996-), 女, 硕士 E-mail: 752442518@ qq. com 通信作者: 曹晓卿(1966-), 女, 博士, 教授 E-mail: caoxiaoqing@ tyut. edu. cn

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