SYMPOSIA PAPER Published: 01 January 1987
STP28136S

Influence of Variations in Early Fabrication Steps on Corrosion, Mechanical Properties, and Structure of Zircaloy-4 Products

Source

Variations in fabrication schedule, beta quenching, extrusion temperature, and intermediate and final annealing were performed in order to study the influence on workability of tube shells and technological properties of final cladding tubes. The mechanical properties of the final tubes depend on the final heat treatment and slightly on the first steps of the fabrication sequence, leading to small differences in the grain size. In addition, the nodular corrosion resistance was investigated. The nodular corrosion sensitivity of the recrystallized cladding tubes points out the influence of the early fabrication steps: The increase of the alpha annealing temperature in any fabrication step is detrimental. Among the tubes tested in this program those with the best nodular corrosion resistance in the high-pressure steam test had the worst behavior using ASTM Practice for Aqueous Corrosion Testing of Samples of Zirconium and Zirconium Alloys (G 2). During the ASTM G 2 test the weight gain of the external surface of the tubes was higher than the weight gain of the internal surface.

Author Information

Charquet, D
Centre de Recherches CEZUS, Ugine, France
Steinberg, E
Zircaloy Tubes, KWU, Erlangen, Federal Republic of Germany
Millet, Y
Centre de Recherches CEZUS, Ugine, France
Price: $25.00
Contact Sales
Related
Reprints and Permissions
Reprints and copyright permissions can be requested through the
Copyright Clearance Center
Details
Developed by Committee: B10
Pages: 431–466
DOI: 10.1520/STP28136S
ISBN-EB: 978-0-8031-5004-1
ISBN-13: 978-0-8031-0935-3