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Interactions between impurities and defects created by irradiation in iron; Interactions entre les impuretes et les defauts crees par irradiation dans le fer

Abstract

Chapter 1 is a brief review of the most important properties of point defects: the author is particularly interested in radiation damage; the different models proposed until now to explain the five annealing stages are exposed. Chapter 2 describes the experimental processes insisting on how fruitful is the magnetic after-effect to investigate point-defects. In chapter 3, new experimental results are exposed and discussed. Owing to addition of impurities to iron, magnetic after effect, stored energy, resistivity and length measurements have allowed to establish that stage I is correctly explained by the Granato-Nilan model (90): only the last stage, I{sub E}, is related to the interstitial-vacancy annihilation after the interstitial have freely migrated into the network. Several models are discussed for stage II; though it is highly probable that di-interstitials have been observed after electron irradiation, after neutron irradiation none of the after-effect zones can be connected with them. Special phenomena are observed in irradiated iron containing such impurities as nickel, silicium (appearance of new after effect zones, their transformation); they show the successive complication of an elementary defect: iron interstitial associated with an impurity atom. In the last section, the author describes some experiments on iron-carbon alloy; these show that  More>>
Authors:
Vigier, P [1] 
  1. Commissariat a l'Energie Atomique, Grenoble (France). Centre d'Etudes Nucleaires
Publication Date:
Jul 01, 1968
Product Type:
Technical Report
Report Number:
CEA-R-3280
Resource Relation:
Other Information: 135 refs
Subject:
36 MATERIALS SCIENCE; ANNEALING; CREEP; DILATANCY; FRENKEL DEFECTS; IMPURITIES; INTERSTITIALS; IRON BASE ALLOYS; MAGNETIC PROPERTIES; PHYSICAL RADIATION EFFECTS; STORED ENERGY; TEMPERATURE DEPENDENCE
OSTI ID:
20726916
Research Organizations:
CEA Grenoble, 38 (France)
Country of Origin:
France
Language:
French
Other Identifying Numbers:
TRN: FR06R3280038361
Availability:
Available from INIS in electronic form
Submitting Site:
FRN
Size:
[111] pages
Announcement Date:
May 24, 2006

Citation Formats

Vigier, P. Interactions between impurities and defects created by irradiation in iron; Interactions entre les impuretes et les defauts crees par irradiation dans le fer. France: N. p., 1968. Web.
Vigier, P. Interactions between impurities and defects created by irradiation in iron; Interactions entre les impuretes et les defauts crees par irradiation dans le fer. France.
Vigier, P. 1968. "Interactions between impurities and defects created by irradiation in iron; Interactions entre les impuretes et les defauts crees par irradiation dans le fer." France.
@misc{etde_20726916,
title = {Interactions between impurities and defects created by irradiation in iron; Interactions entre les impuretes et les defauts crees par irradiation dans le fer}
author = {Vigier, P}
abstractNote = {Chapter 1 is a brief review of the most important properties of point defects: the author is particularly interested in radiation damage; the different models proposed until now to explain the five annealing stages are exposed. Chapter 2 describes the experimental processes insisting on how fruitful is the magnetic after-effect to investigate point-defects. In chapter 3, new experimental results are exposed and discussed. Owing to addition of impurities to iron, magnetic after effect, stored energy, resistivity and length measurements have allowed to establish that stage I is correctly explained by the Granato-Nilan model (90): only the last stage, I{sub E}, is related to the interstitial-vacancy annihilation after the interstitial have freely migrated into the network. Several models are discussed for stage II; though it is highly probable that di-interstitials have been observed after electron irradiation, after neutron irradiation none of the after-effect zones can be connected with them. Special phenomena are observed in irradiated iron containing such impurities as nickel, silicium (appearance of new after effect zones, their transformation); they show the successive complication of an elementary defect: iron interstitial associated with an impurity atom. In the last section, the author describes some experiments on iron-carbon alloy; these show that carbon atoms (having precipitated at a temperature lower than 300 deg. C return to solid solution when the alloy is heated above 330 deg. C. (author) [French] Au cours du premier chapitre consacre a un bref rappel des principales proprietes des defauts ponctuels, l'auteur s'attache particulierement a l'effet de l'irradiation; les divers modeles proposes jusqu'alors pour expliquer les cinq stades de disparition des defauts sont exposes. Le deuxieme chapitre decrit les techniques experimentales en insistant sur la richesse du trainage magnetique comme moyen d'investigation. Le troisieme chapitre est consacre a l'expose et aux discussions de nouveaux resultats experimentaux. Grace a l'addition d'impurete dans le fer, des experiences de trainage magnetique, energie stockee, resistivite et dilatometrie ont permis d'etablir que le stade I se rattache au modele propose par Granato et Nilan (90): seul le dernier sous-stade I{sub E} provient de la disparition des interstitiels dans les lacunes apres leur libre migration dans le reseau. Divers modeles sont discutes pour le stade II; s'il est probable que les diinterstitiels sont observables apres une irradiation aux electrons, aucune bande de trainage ne semble leur correspondre apres une irradiation aux neutrons. Des phenomenes particuliers apparaissent dans le fer irradie lorsqu'il contient des impuretes telles que nickel ou silicium (apparition de nouvelles bandes de trainage, leur transformation les unes dans les autres); ils refletent la complication successive du defaut elementaire interstitiel de fer-atome d'impurete. Enfin, dans une derniere section, l'auteur decrit quelques experiences effectuees sur des alliages fer-carbone irradies ou non ; elles montrent que le carbone apres avoir precipite a une temperature inferieure a 300 deg. C, se remet en solution lorsque l'alliage est chauffe au-dela de 330 deg. C. (auteur)}
place = {France}
year = {1968}
month = {Jul}
}