Fatigue properties improvement of high-strength aluminum alloy by using a ZrCu-based metallic glass thin film coating

P. H. Tsai, J. B. Li, Y. Z. Chang, H. C. Lin, J. S.C. Jang, J. P. Chu, J. W. Lee, P. K. Liaw

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

For further enhancing the fatigue properties of high-strength aluminum alloy, the coating, which was combined with a layer of 200 nm ZrCu-based metallic glass thin film (MGTF) coupled with 50 nm titanium thin film buffer layer, was applied to coat on the surface of 7075-T6 aluminum alloy by the DC sputtering method. The results show that the fatigue limit could be significantly improved from 150 MPa for the uncoated sample to 250 MPa (66.7% increase) for the samples coated with ZrCu-based MGTF. In parallel, the fatigue life of 7075-T6 aluminum alloy with ZrCu-based MGTF could be drastically improved 45 times at a stress level of 250 MPa than the bare one. The outstanding mechanical properties of ZrCu-based MGTF, such as high strength and good adhesion between the film and the substrate, are the key factors to enhance the fatigue resistance of the coated aluminum alloy.

Original languageEnglish
Pages (from-to)28-32
Number of pages5
JournalThin Solid Films
Volume561
DOIs
StatePublished - 30 Jun 2014

Keywords

  • Fatigue property
  • Metallic glass
  • Sputtering
  • Thin film

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