Effect of sub-Tgannealing on the corrosion resistance of the Cu-Zr amorphous alloys

Sang Soo Shin, Hong Kyu Kim, Jae-chul Lee, Ik Min Park

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Despite the economy of material cost and excellent toughness of Cu-based amorphous alloys, especially Cu50Zr50, their poor corrosion resistance to a chloride medium limits their widespread applications. In this study, corrosion tests were performed on the Cu50Zr50amorphous alloy with different degrees of short-range order, which were prepared by annealing below the glass transition temperature (Tg). It was found that the corrosion resistance of amorphous alloys is improved to a significant level when the alloys were heated below Tg. Calorimetric studies showed that thermally activated relaxation process of created disorder, which occurs during sub-Tgannealing, is responsible for the improvement in the corrosion resistance. Molecular dynamics simulations performed on the Cu-Zr amorphous alloys demonstrated that the relaxation process of the alloys is associated with the formation of energetically stable icosahedra and icosahedron-like structures. Our study highlights the effects of sub-Tgannealing on the improvement in the corrosion resistance of the amorphous alloys from the viewpoint the relaxation process of the short-range orders.

Original languageEnglish
Pages (from-to)273-280
Number of pages8
JournalActa Metallurgica Sinica (English Letters)
Volume31
Issue number3
DOIs
Publication statusPublished - 2018 Jan 1

Keywords

  • Amorphous alloys
  • Annealing
  • Corrosion
  • Electrochemical performance
  • Molecular dynamics

ASJC Scopus subject areas

  • Metals and Alloys
  • Industrial and Manufacturing Engineering

Fingerprint Dive into the research topics of 'Effect of sub-T<sub>g</sub>annealing on the corrosion resistance of the Cu-Zr amorphous alloys'. Together they form a unique fingerprint.

  • Cite this