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Tensile and Hardness Property Evaluations of Irradiated Zircaloy Cladding Under Off-Normal and Transient Conditions

Lowry, LM
Researcher and research leaders,Battelle's Columbus Laboratories,Ohio,

Perrin, JS
Researcher and research leaders,Battelle's Columbus Laboratories,Ohio,

Bauer, AA
Researcher and research leaders,Battelle's Columbus Laboratories,Ohio,


Pages: 10    Published: Jan 1976


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Source: STP611-EB


Abstract

A program is being conducted to determine the mechanical behavior of irradiated Zircaloy-4 fuel rod cladding subjected to anneals under temperature and time conditions that simulate various off-normal and transient reactor operating conditions. This paper reports the initial phase of the program, which is a study of changes in hardness and tensile properties that accompany isothermal and transient anneals. A special transient annealing apparatus was built to subject specimens to the desired temperature/time conditions. Hardness and tensile strength decreased with increase in the maximum annealing temperature from 800°F (425°C) to 1300°F (705°C). Changes above 1100°F (595°C) were related to recrystallization and grain growth.


Keywords:
radiation, mechanical properties, cladding, annealing, strength, grain growth, recrystallization

Paper ID: STP38047S
Committee/Subcommittee: E10.07
DOI: 10.1520/STP38047S
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