Dissolution of Intermetallic Second-Phase Particles in Zircaloy-2 in High-Temperature Steam

Weicheng Zhong, Xiang Liu, Peter A. Mouche, Jun Li Lin, Donghee Park, Mohamed S. Elbakhshwan, Simerjeet K. Gill, Yang Ren, James F Stubbins, Brent J Heuser

Research output: Contribution to journalArticle

Abstract

The stability of intermetallic second-phase particles (SPPs) in coated Zircaloy-2 was studied in 700 °C steam environments up to 20 hours. Hydrogen generated from high-temperature steam oxidation of uncoated Zr-induced δ-hydrides formation in the Zircaloy matrix. Synchrotron XRD demonstrated that longer exposure times increased hydride peak intensity and decreased intermetallic SPPs’ peak intensity. Cross-sectional SEM analysis verified the intermetallic SPPs’ volume fraction reduction. The size distribution of intermetallic SPPs was characterized and larger particles were dissolved at longer oxidation time. A correlation between the hydrogen concentration and the volume fraction of intermetallic SPPs at 700 °C steam environment was found, with the volume fraction of SPPs decreasing as hydrogen concentration increases.

Original languageEnglish (US)
Pages (from-to)1851-1861
Number of pages11
JournalMetallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Volume50
Issue number4
DOIs
StatePublished - Apr 15 2019

Fingerprint

Zircaloy 2 (trademark)
Steam
steam
Intermetallics
intermetallics
dissolving
Dissolution
Hydrogen
Volume fraction
Hydrides
Temperature
hydrides
Oxidation
hydrogen
Synchrotrons
oxidation
Scanning electron microscopy
synchrotrons
scanning electron microscopy

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys

Cite this

Dissolution of Intermetallic Second-Phase Particles in Zircaloy-2 in High-Temperature Steam. / Zhong, Weicheng; Liu, Xiang; Mouche, Peter A.; Lin, Jun Li; Park, Donghee; Elbakhshwan, Mohamed S.; Gill, Simerjeet K.; Ren, Yang; Stubbins, James F; Heuser, Brent J.

In: Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, Vol. 50, No. 4, 15.04.2019, p. 1851-1861.

Research output: Contribution to journalArticle

Zhong, Weicheng ; Liu, Xiang ; Mouche, Peter A. ; Lin, Jun Li ; Park, Donghee ; Elbakhshwan, Mohamed S. ; Gill, Simerjeet K. ; Ren, Yang ; Stubbins, James F ; Heuser, Brent J. / Dissolution of Intermetallic Second-Phase Particles in Zircaloy-2 in High-Temperature Steam. In: Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science. 2019 ; Vol. 50, No. 4. pp. 1851-1861.
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