Effects of alloying elements (Sn, Nb, Cr, and Mo) on the microstructure and mechanical properties of zirconium alloys

Huilong Yang, Jingjie Shen, Yoshitaka Matsukawa, Yuhki Satoh, Sho Kano, Zishou Zhao, Yanfen Li, Feng Li, Hiroaki Abe

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)

Abstract

The alloying effects of Sn, Nb, Cr, and Mo on zirconium alloys were elucidated and compared. Electron backscatter diffraction, transmission electron microscopy, tensile test, and fractographic observation were jointly utilized to carry out detailed microstructural characterization and mechanical property evaluation. Results show that Mo is the most effective among these elements from the viewpoints of strengthening and reducing grain size. The strengthening mechanism for each element is also discussed. The order of solid-solution strengthening of these alloying elements is Cr > Nb > Sn, and the sequence is Cr ≈ Mo > Nb when precipitation strengthening is considered. Further, as far as the ability to impede dislocation motion is concerned, the sequence is Mo > Cr > Nb > Sn. The experimental results demonstrate that minor amount of Mo addition in zirconium alloys is greatly effective in strengthening the alloy and reducing the grain size.

Original languageEnglish
Pages (from-to)1162-1173
Number of pages12
Journaljournal of nuclear science and technology
Volume52
Issue number9
DOIs
Publication statusPublished - 2015 Sep 2

Keywords

  • cold-rolling
  • fuel cladding
  • mechanical property
  • microstructure
  • recrystallization
  • zirconium alloy

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering

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