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Study of the recrystallisation of irradiated uranium; Etude sur l'uranium irradie

Abstract

1- Study of the recrystallisation of irradiated uranium. The recrystallisation of uranium irradiated to a burnup level of 220 MWj/t, at a temperature of the order of 350 deg. C, has been investigated. The observations were made chiefly by means of micrography an hardness measurements. If the irradiated metal is compared with a cold-drawn metal showing the same shearing of the twinned crystals, and therefore the same rate of plastic deformation, as the irradiated metal, it is noted that the restoring of the irradiated metal takes place at a considerably higher temperature than that of the cold-drawn metal. Pre-crystallisation is very much delayed. Only, a passage of the {alpha}-{beta} transformation point quickly wipes out irradiation effect. 2- Hardening of uranium by irradiation. Using hardness measurements we have studied more especially the effect of very weak irradiations on uranium (integrated flux < 10{sup 16} nvt). The hardness does not increase linearly with the flux, but a period of incubation is observed probably representing the time necessary for saturation of the dislocations. (author)Fren. [French] 1- Etude de la recristallisation de l'uranium irradie. On a etudie la recristallisation d'uranium irradie jusqu'a un taux de combustion de 220 MWj/t a une temperature de l'ordre  More>>
Authors:
Bloch, J; Mustelier, J P; Bussy, P; Blin, J [1] 
  1. Commissariat a l'Energie Atomique, Saclay (France). Centre d'Etudes Nucleaires
Publication Date:
Jul 01, 1958
Product Type:
Technical Report
Report Number:
CEA-R-987
Resource Relation:
Other Information: 6 refs
Subject:
36 MATERIALS SCIENCE; ANNEALING; BIPHENYL; BULK DENSITY; BURNUP; CHEMICAL POLISHING; COLD WORKING; CRYSTALLOGRAPHY; ELECTROPOLISHING; METALLOGRAPHY; MICROHARDNESS; MICROSTRUCTURE; PHOTOMICROGRAPHY; POST-IRRADIATION EXAMINATION; RADIATION HARDENING; RECRYSTALLIZATION; SPENT FUELS; TEMPERING; TWINNING; URANIUM-ALPHA; URANIUM-BETA; VICKERS HARDNESS
OSTI ID:
20901036
Research Organizations:
CEA Saclay, 91 - Gif-sur-Yvette (France)
Country of Origin:
France
Language:
French
Other Identifying Numbers:
TRN: FR07R0987063259
Availability:
Available from INIS in electronic form
Submitting Site:
FRN
Size:
31 pages
Announcement Date:
Aug 28, 2007

Citation Formats

Bloch, J, Mustelier, J P, Bussy, P, and Blin, J. Study of the recrystallisation of irradiated uranium; Etude sur l'uranium irradie. France: N. p., 1958. Web.
Bloch, J, Mustelier, J P, Bussy, P, & Blin, J. Study of the recrystallisation of irradiated uranium; Etude sur l'uranium irradie. France.
Bloch, J, Mustelier, J P, Bussy, P, and Blin, J. 1958. "Study of the recrystallisation of irradiated uranium; Etude sur l'uranium irradie." France.
@misc{etde_20901036,
title = {Study of the recrystallisation of irradiated uranium; Etude sur l'uranium irradie}
author = {Bloch, J, Mustelier, J P, Bussy, P, and Blin, J}
abstractNote = {1- Study of the recrystallisation of irradiated uranium. The recrystallisation of uranium irradiated to a burnup level of 220 MWj/t, at a temperature of the order of 350 deg. C, has been investigated. The observations were made chiefly by means of micrography an hardness measurements. If the irradiated metal is compared with a cold-drawn metal showing the same shearing of the twinned crystals, and therefore the same rate of plastic deformation, as the irradiated metal, it is noted that the restoring of the irradiated metal takes place at a considerably higher temperature than that of the cold-drawn metal. Pre-crystallisation is very much delayed. Only, a passage of the {alpha}-{beta} transformation point quickly wipes out irradiation effect. 2- Hardening of uranium by irradiation. Using hardness measurements we have studied more especially the effect of very weak irradiations on uranium (integrated flux < 10{sup 16} nvt). The hardness does not increase linearly with the flux, but a period of incubation is observed probably representing the time necessary for saturation of the dislocations. (author)Fren. [French] 1- Etude de la recristallisation de l'uranium irradie. On a etudie la recristallisation d'uranium irradie jusqu'a un taux de combustion de 220 MWj/t a une temperature de l'ordre de 350 deg. C. Les observations ont ete faites principalement a l'aide de la micrographie et de la durete. Si l'on compare le metal irradie avec un metal ecroui presentant le meme cisaillement des macles, donc le meme taux de deformation plastique que le metal irradie, on constate que la restauration du metal irradie se fait a une temperature notablement superieure a celle du metal ecroui. La recristallisation est tres retardee. Seul, un passage du point de transformation {alpha}-{beta} efface rapidement l'effet de l'irradiation. 2- Durcissement de l'uranium par irradiation. Nous avons, a l'aide de la durete, etudie plus particulierement l'effet de tres faibles irrtions sur l'uranium (flux integre < 10{sup 16} nvt). La durete ne croit pas lineairement avec le flux, mais on observe une periode d'incubation qui represente sans doute le temps necessaire a la saturation des dislocations. (auteur)}
place = {France}
year = {1958}
month = {Jul}
}