Sn含量对Al-Zn合金组织与溶解性能的影响

材料导报

2019, Vol. 33

Issue (Z2): 406-409

金属与金属基复合材料

Sn含量对Al-Zn合金组织与溶解性能的影响

周勇, 赵飞, 高倩, 孙良, 董会, 翟文彦

西安石油大学材料科学与工程学院,西安 710065

Effect of Sn Content on Microstructure and Solubility of Al-Zn Alloy

ZHOU Yong, ZHAO Fei, GAO Qian, SUN Liang, DONG Hui, ZHAI Wenyan

School of Material Science and Engineering, Xi’an Shiyou University, Xi’an 710065

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摘要为了改善Al-Zn合金组织,有效调控合金的溶解速率,采用光学显微镜(OM)、X射线衍射仪(XRD)、扫描电子显微镜(SEM)、能谱仪(EDS)和电化学工作站等测试手段,研究了不同Sn含量对铸态Al-Zn合金微观组织和电化学性能的影响规律。结果表明:合金主要由Al基体相、Al_0.71-Zn_0.29相和Sn相组成,随着Sn含量的增加,析出相在晶界处的含量明显增加,尺寸逐渐增大,且由颗粒状逐渐转变为长条状;当Sn含量从0.1wt%增加到2wt%时,合金的平均晶粒尺寸从194.54 μm减小到65.33 μm,溶解速率和电化学活性不断提高;Sn含量继续增加,合金的平均晶粒尺寸逐渐增大,溶解速率和电化学活性下降。

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关键词: Sn含量 Al-Zn合金微观组织溶解速率电化学性能

Abstract: In order to improve the microstructure of the Al-Zn alloy, the dissolution rate of the alloy canbe effectively controlled. The influence of different Sn content on microstructure and electrochemical properties of as-cast Al-Zn alloy was studied by means of optical microscope (OM), X-ray diffractometer (XRD), scanning electron microscope (SEM), energy dispersive spectrometer (EDS) and electrochemical workstation. The results show that the alloy is mainly composed of Al matrix phase, Al_0.71Zn_0.29 phase and Sn phase, with the increase of Sn element content, the content of the precipitated phase at the grain boundary is increased obviously, the size is gradually increased, and the grain is gradually changed into a strip shape. When the Sn content increased from 0.1wt% to 2wt%, the average grain size of the alloy decreased from 194.54 μm to 65.33 μm, and the dissolution rate and the electrochemical activity of the alloy were continuously improved. As Sn content continued to increase, the average grain size of the alloy gradually increased, while dissolution rate and electrochemical activity decreased.

Key words: Sn content Al-Zn alloy microstructure dissolution rate electrochemical performance

出版日期: 2019-11-25 发布日期: 2019-11-25

ZTFLH:

TG146.2

基金资助: 西安石油大学研究生创新与实践能力培养项目(YCS17211038);西安石油大学“材料科学与工程”省级优势学科资助(YS37020203)

通讯作者: yzhou@xsyu.edu.cn

作者简介: 周勇,教授,硕士研究生导师。主要从事石油工程材料的焊接与表面工程技术研究。主持和参加科研项目20余项,参编教材1部;获陕西省科技进步二等奖,中国石油天然气总公司科技进步三等奖各一项;在国内外公开刊物上发表学术论文50余篇。

引用本文:

周勇, 赵飞, 高倩, 孙良, 董会, 翟文彦. Sn含量对Al-Zn合金组织与溶解性能的影响[J]. 材料导报, 2019, 33(Z2): 406-409.
ZHOU Yong, ZHAO Fei, GAO Qian, SUN Liang, DONG Hui, ZHAI Wenyan. Effect of Sn Content on Microstructure and Solubility of Al-Zn Alloy. Materials Reports, 2019, 33(Z2): 406-409.

链接本文:

http://www.mater-rep.com/CN/ 或 http://www.mater-rep.com/CN/Y2019/V33/IZ2/406

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