期刊文献+

Effect of samarium on microstructure and corrosion resistance of aged as-cast AZ92 magnesium alloy 被引量:2

Effect of samarium on microstructure and corrosion resistance of aged as-cast AZ92 magnesium alloy
原文传递
导出
摘要 The effects of samarium(Sm) on microstructure and corrosion resistance of AZ92 magnesium alloy were characterized and analyzed by scanning electronic microscopy, X-ray diffraction, mass loss test, electrochemical impedance spectroscopy, X-ray photoelectron spectroscopy and potentio-dynamic polarization test. The results showed that the added Sm could promote continuous precipitation of β-Mg17Al12 phase in grains, and meanwhile restrain discontinuous precipitation of the same phase along the grain boundaries. Thus, the precipitations distributed more uniformly in the aged AZ92 magnesium alloys. When the content of Sm was 0.5 wt.%, the corrosion resistance of aged AZ92 alloy tended to be the best, which was due to the β-phase distributes more homogeneous reducing the galvanic corrosion. The corrosion product film had more integrality and compactness than AZ92 alloys without Sm. However, it resulted in worse corrosion resistance of AZ92 alloy because of the formation of mass cathodic Al2 Sm phase coming from excess Sm in AZ92 alloy. The effects of samarium(Sm) on microstructure and corrosion resistance of AZ92 magnesium alloy were characterized and analyzed by scanning electronic microscopy, X-ray diffraction, mass loss test, electrochemical impedance spectroscopy, X-ray photoelectron spectroscopy and potentio-dynamic polarization test. The results showed that the added Sm could promote continuous precipitation of β-Mg17Al12 phase in grains, and meanwhile restrain discontinuous precipitation of the same phase along the grain boundaries. Thus, the precipitations distributed more uniformly in the aged AZ92 magnesium alloys. When the content of Sm was 0.5 wt.%, the corrosion resistance of aged AZ92 alloy tended to be the best, which was due to the β-phase distributes more homogeneous reducing the galvanic corrosion. The corrosion product film had more integrality and compactness than AZ92 alloys without Sm. However, it resulted in worse corrosion resistance of AZ92 alloy because of the formation of mass cathodic Al2 Sm phase coming from excess Sm in AZ92 alloy.
出处 《Journal of Rare Earths》 SCIE EI CAS CSCD 2014年第7期663-671,共9页 稀土学报(英文版)
基金 Project supported by National Hi-Tech R&D Program of China(863 Program,2011AA03A409) Major State Basic Research Development Program of China(973 Program,2012CBA01207)
关键词 AZ92 alloy SAMARIUM MICROSTRUCTURE precipitation corrosion resistance rare earths AZ92 alloy samarium microstructure precipitation corrosion resistance rare earths
  • 相关文献

参考文献3

二级参考文献18

  • 1杨友,刘勇兵,秦淑影,方懿.High Cycle Fatigue Properties of Die-Cast Magnesium Alloy AZ91D with Addition of Different Concentrations of Cerium[J].Journal of Rare Earths,2006,24(5):591-595. 被引量:8
  • 2Emley E F. Principles of Magnesium Technology. Oxford:Pergamon Press, 1966:687.
  • 3Froats A, Aune T K, Hawke D, Unsworth W, Hillis J. In:Metals Handbook, Vol.13, 9ed., Metals Park, Ohio: ASM,1987:740.
  • 4Maker G L, Kruger J. Int Mater Rev, 1993; 38:138.
  • 5Song G, Atrens A. Adv Eng Mater, 1999; 1(1): 11.
  • 6Ghali E. Mater Sci Forum, 2000; 350-351:261.
  • 7Song G, Atrens A, Dargusch M. Corros Sci, 1999; 41:249.
  • 8Ambat R, Aung N N, Zhou W. Corros Sci, 2000; 42:1433.
  • 9Lunder O, Lein J E, Hesjevik S M. Corrosion, 1989; 45:741.
  • 10Beldjoudi T, Fiaud C, Robbiola L. Corrosion. 1993; 49:733.

共引文献26

同被引文献9

引证文献2

二级引证文献10

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部