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Title: Uniaxial tensile properties of Zircaloy containing oxygen: summary report

Abstract

The uniaxial stress-strain behavior of Zircaloy-2 and -4, Zircaloy-oxygen alloys with a uniform oxygen distribution, and composite specimens with a ZrO/sub 2//..cap alpha../..beta.. layer structure was investigated over the range of experimental conditions: temperature 25-1400/sup 0/C; strain rate 10/sup -6/ - 10/sup -1/ s/sup -1/; oxygen content 0.11 - 4.4 wt %; grain size 5-50 ..mu..m; texture longitudinal, transverse, and diagonal orientations; and microstructural state, which consists of the equiaxed ..cap alpha.. phase and various transformed ..beta.. acicular structures. The work-hardening and strain-rate sensitivity parameters were determined from the experimental results, and the tensile properties were correlated with oxygen concentration, oxygen distribution in the material, and microstructure. Dynamic strain-aging phenomena were observed in Zircaloy at 200, 400, and 700/sup 0/C, and superplastic deformation occurred at 850 and 1000/sup 0/C. An increase in the oxygen concentration in homogeneous Zircaloy-oxygen alloys increased the ultimate tensile strength and decreased the total strain, particularly below approximately 900/sup 0/C. In composite specimens with the ZrO/sub 2//..cap alpha../..beta.. structure, the total oxygen content had little effect on the ultimate tensile strength below approximately 1000/sup 0/C, but the strength increased with oxygen content at higher temperatures. Information on the effects of grain size, oxygen content, texture, andmore » strain rate on the stress-strain behavior suggests that the dominant mechanism of superplastic deformation in Zircaloy near approximately 850/sup 0/C is grain-boundary sliding at the ..cap alpha..-..beta.. interface with accommodation by diffusional creep, dislocation slip, and grain-boundary migration. Good correlation was obtained between ductility and values of the strain-rate sensitivity parameter.« less

Authors:
; ;
Publication Date:
Research Org.:
Argonne National Lab., Ill. (USA)
Sponsoring Org.:
US Energy Research and Development Administration (ERDA)
OSTI Identifier:
5244985
Report Number(s):
ANL-77-30
TRN: 78-002697
DOE Contract Number:  
W-31-109-ENG-38
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ZIRCALOY 2; TENSILE PROPERTIES; ZIRCALOY 4; GRAIN ORIENTATION; HIGH TEMPERATURE; MICROSTRUCTURE; STRAIN HARDENING; STRAINS; STRESSES; VERY HIGH TEMPERATURE; ALLOYS; CHROMIUM ADDITIONS; CHROMIUM ALLOYS; CRYSTAL STRUCTURE; HARDENING; IRON ADDITIONS; IRON ALLOYS; MECHANICAL PROPERTIES; ORIENTATION; TIN ALLOYS; ZIRCALOY; ZIRCONIUM ALLOYS; ZIRCONIUM BASE ALLOYS; 360103* - Metals & Alloys- Mechanical Properties

Citation Formats

Garde, A M, Chung, H M, and Kassner, T F. Uniaxial tensile properties of Zircaloy containing oxygen: summary report. United States: N. p., 1977. Web. doi:10.2172/5244985.
Garde, A M, Chung, H M, & Kassner, T F. Uniaxial tensile properties of Zircaloy containing oxygen: summary report. United States. https://doi.org/10.2172/5244985
Garde, A M, Chung, H M, and Kassner, T F. 1977. "Uniaxial tensile properties of Zircaloy containing oxygen: summary report". United States. https://doi.org/10.2172/5244985. https://www.osti.gov/servlets/purl/5244985.
@article{osti_5244985,
title = {Uniaxial tensile properties of Zircaloy containing oxygen: summary report},
author = {Garde, A M and Chung, H M and Kassner, T F},
abstractNote = {The uniaxial stress-strain behavior of Zircaloy-2 and -4, Zircaloy-oxygen alloys with a uniform oxygen distribution, and composite specimens with a ZrO/sub 2//..cap alpha../..beta.. layer structure was investigated over the range of experimental conditions: temperature 25-1400/sup 0/C; strain rate 10/sup -6/ - 10/sup -1/ s/sup -1/; oxygen content 0.11 - 4.4 wt %; grain size 5-50 ..mu..m; texture longitudinal, transverse, and diagonal orientations; and microstructural state, which consists of the equiaxed ..cap alpha.. phase and various transformed ..beta.. acicular structures. The work-hardening and strain-rate sensitivity parameters were determined from the experimental results, and the tensile properties were correlated with oxygen concentration, oxygen distribution in the material, and microstructure. Dynamic strain-aging phenomena were observed in Zircaloy at 200, 400, and 700/sup 0/C, and superplastic deformation occurred at 850 and 1000/sup 0/C. An increase in the oxygen concentration in homogeneous Zircaloy-oxygen alloys increased the ultimate tensile strength and decreased the total strain, particularly below approximately 900/sup 0/C. In composite specimens with the ZrO/sub 2//..cap alpha../..beta.. structure, the total oxygen content had little effect on the ultimate tensile strength below approximately 1000/sup 0/C, but the strength increased with oxygen content at higher temperatures. Information on the effects of grain size, oxygen content, texture, and strain rate on the stress-strain behavior suggests that the dominant mechanism of superplastic deformation in Zircaloy near approximately 850/sup 0/C is grain-boundary sliding at the ..cap alpha..-..beta.. interface with accommodation by diffusional creep, dislocation slip, and grain-boundary migration. Good correlation was obtained between ductility and values of the strain-rate sensitivity parameter.},
doi = {10.2172/5244985},
url = {https://www.osti.gov/biblio/5244985}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1977},
month = {6}
}