姚怀,熊毅,查小琴,李欢,师慧娜,刘亚.固溶处理Mg-0.5Zr-1.8Zn-xGd (wt %)生物可降解镁合金组织、力学性能和腐蚀性能(英文)[J].稀有金属材料与工程,0,():-.[Yao Huai,Xiong Yi,Zha Xiaoqin,Li Huan,Shi Huina,Liu Ya.Microstructures, mechanical properties and corrosion behavior of solution-treated Mg-0.5Zr-1.8Zn-xGd (wt %) biodegradable alloys[J].Rare Metal Materials and Engineering,0,():-].
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固溶处理Mg-0.5Zr-1.8Zn-xGd (wt %)生物可降解镁合金组织、力学性能和腐蚀性能(英文)
投稿时间:2020-05-27  修订日期:2020-06-09
中文关键词:  镁合金  固溶处理  组织  力学性能  腐蚀
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
中文摘要:
      Mg-0.5Zr-1.8Zn-xGd (x=0, 0.5, 1.0, 1.5, 2.0和2.5 wt%)镁合金经过470 ℃和10 h固溶处理后的组织、力学性能和耐腐蚀性能被研究。实验结果表明,Gd含量在0-2.5 wt%范围内,随着Gd含量增加,合金晶粒尺寸逐渐减小。当Gd含量低于1.5 wt%时,合金元素几乎完全固溶于合金基体中,第二相主要由纳米尺度的(Mg, Zn)3Gd析出颗粒组成。当Gd含量在1.5-2.5 wt%范围时,合金中出现未固溶的微米尺度的(Mg, Zn)3Gd相,并且该相数量和尺寸随着Gd含量增加而增加。由于组织均匀分布和纳米尺寸的第二相颗粒存在,Mg-0.5Zr-1.8Zn-1.5Gd合金具有优异的力学性能和耐腐蚀性能。在120 h浸泡实验中,Mg-0.5Zr-1.8Zn-1.5Gd合金平均腐蚀速率首先降低,然后增加,接着缓慢降低,最后,随着浸泡时间延长,腐蚀速率最终变得稳定。
Microstructures, mechanical properties and corrosion behavior of solution-treated Mg-0.5Zr-1.8Zn-xGd (wt %) biodegradable alloys
英文关键词:magnesium alloys  solution treatment  microstructure  mechanical properties  corrosion
英文摘要:
      The microstructure, mechanical and anticorrosion properties of Mg-0.5Zr-1.8Zn-xGd (x=0, 0.5, 1.0, 1.5, 2.0 and 2.5 wt%) alloys were investigated after a solution treatment at 470 oC for 10 h. Experimental results indicate that the size of the alloy’s grain decreases with the Gd content at the range of 0-2.5 wt%. When the Gd content is less than 1.5 wt%, the alloy elements are more completely dissolved into the alloy matrix, and the second phase is mainly composed of nanoscale (Mg, Zn)3Gd precipitated particle. At the range of 1.5-2.5 wt%, the insoluble micron-scale (Mg, Zn)3Gd phase emerged in the alloy, and the number and size of the (Mg, Zn)3Gd phase increased with the Gd content. The Mg-0.5Zr-1.8Zn-1.5Gd alloy shows excellent mechanical properties and anticorrosive ability, which could be attributed to a more homogeneous microstructure and the presence of nanomeric secondary phase particles. In the 120 h immersion expriment, the average corrosion rate of the Mg-0.5Zr-1.8Zn-1.5Gd alloy deceases at first, then increases, and then decreases slowly. At last, with the increase of immersion time, it eventually becomes stable.
作者单位
姚怀 材料科学与工程学院 
熊毅 材料科学与工程学院 
查小琴  
李欢 材料科学与工程学院 
师慧娜 材料科学与工程学院 
刘亚 材料科学与工程学院 
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