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Non-Destructive Examination of the Heat-Affected Zone of Welded Zr-Nb Alloy; Controle Non Destructif de la Zone d'Un Alliage Zr-Nb Affectee par la Chaleur Lors du Soudage; Nedestruktivnoe ispytanie zony svarnogo shva iz tsirkonij-niobij splava, kotoryj podverzhen teplovomu vliyaniyu; Examen No Destructivo de la Zona de Soldadura Afectada por el Calor en las Aleaciones de Circonio y Niobio

Conference:

Abstract

An alloy of zirconium, 2 Vulgar-Fraction-One-Half % niobium has advantages for pressure containment in water-moderated reactors owing to the strength attainable by heat treatment. The corrosion resistance of the alloy under reactor operating conditions is also sensitively affected by heat treatment and zones of low corrosion resistance may be produced in the heat-affected zones of fusion welds. The zones susceptible to corrosion may be identified by autoclave treatment but this is not convenient when extensive pressure circuits are being assembled by welding. It has been found that heat-affected zones susceptible to corrosion can be detected non-destructively by measuring the thermo-electric potential between a heated metallic point probe in contact with particular regions of the weld and adjacent metal. The construction of the thermo-electric probe is similar to one devised by the British Non-ferrous Metals Research Association for measuring plating thickness on metal substrates and a commercially available instrument incorporating this type of probe is, with simple modification, suitable for testing welds in Zr-Nb alloys. An example is given of the variation of probe response across the heat-affected zones of a weld and is compared with an autoclave test for corrosion. (author) [French] Un alliage zirconium-niobium a 2,5% Nb presente des  More>>
Authors:
Hanstock, R. F.; Walker, D. C.B. [1] 
  1. U.K.A.E.A. Reactor Materials Laboratory, Culcheth (United Kingdom)
Publication Date:
Oct 15, 1965
Product Type:
Conference
Report Number:
IAEA-SM-63/38
Resource Relation:
Conference: Symposium on Non-Destructive Testing in Nuclear Technology, Bucharest (Romania), 17-21 May 1965; Other Information: 2 refs., 4 figs., 2 tabs.; Related Information: In: Non-Destructive Testing in Nuclear Technology Vol. II. Proceedings of a Symposium on Non-Destructive Testing in Nuclear Technology| 462 p.
Subject:
42 ENGINEERING; AUTOCLAVES; CORROSION; CORROSION RESISTANCE; ELECTRIC PROBES; HEAT AFFECTED ZONE; HEAT TREATMENTS; NIOBIUM ALLOYS; NONDESTRUCTIVE TESTING; PLATING; WATER MODERATED REACTORS; WELDED JOINTS; WELDING; ZIRCONIUM ALLOYS
OSTI ID:
22121962
Research Organizations:
International Atomic Energy Agency, Vienna (Austria)
Country of Origin:
IAEA
Language:
English
Other Identifying Numbers:
Other: ISSN 0074-1884; TRN: XA13M2555078073
Submitting Site:
INIS
Size:
page(s) 277-284
Announcement Date:
Aug 27, 2013

Conference:

Citation Formats

Hanstock, R. F., and Walker, D. C.B. Non-Destructive Examination of the Heat-Affected Zone of Welded Zr-Nb Alloy; Controle Non Destructif de la Zone d'Un Alliage Zr-Nb Affectee par la Chaleur Lors du Soudage; Nedestruktivnoe ispytanie zony svarnogo shva iz tsirkonij-niobij splava, kotoryj podverzhen teplovomu vliyaniyu; Examen No Destructivo de la Zona de Soldadura Afectada por el Calor en las Aleaciones de Circonio y Niobio. IAEA: N. p., 1965. Web.
Hanstock, R. F., & Walker, D. C.B. Non-Destructive Examination of the Heat-Affected Zone of Welded Zr-Nb Alloy; Controle Non Destructif de la Zone d'Un Alliage Zr-Nb Affectee par la Chaleur Lors du Soudage; Nedestruktivnoe ispytanie zony svarnogo shva iz tsirkonij-niobij splava, kotoryj podverzhen teplovomu vliyaniyu; Examen No Destructivo de la Zona de Soldadura Afectada por el Calor en las Aleaciones de Circonio y Niobio. IAEA.
Hanstock, R. F., and Walker, D. C.B. 1965. "Non-Destructive Examination of the Heat-Affected Zone of Welded Zr-Nb Alloy; Controle Non Destructif de la Zone d'Un Alliage Zr-Nb Affectee par la Chaleur Lors du Soudage; Nedestruktivnoe ispytanie zony svarnogo shva iz tsirkonij-niobij splava, kotoryj podverzhen teplovomu vliyaniyu; Examen No Destructivo de la Zona de Soldadura Afectada por el Calor en las Aleaciones de Circonio y Niobio." IAEA.
@misc{etde_22121962,
title = {Non-Destructive Examination of the Heat-Affected Zone of Welded Zr-Nb Alloy; Controle Non Destructif de la Zone d'Un Alliage Zr-Nb Affectee par la Chaleur Lors du Soudage; Nedestruktivnoe ispytanie zony svarnogo shva iz tsirkonij-niobij splava, kotoryj podverzhen teplovomu vliyaniyu; Examen No Destructivo de la Zona de Soldadura Afectada por el Calor en las Aleaciones de Circonio y Niobio}
author = {Hanstock, R. F., and Walker, D. C.B.}
abstractNote = {An alloy of zirconium, 2 Vulgar-Fraction-One-Half % niobium has advantages for pressure containment in water-moderated reactors owing to the strength attainable by heat treatment. The corrosion resistance of the alloy under reactor operating conditions is also sensitively affected by heat treatment and zones of low corrosion resistance may be produced in the heat-affected zones of fusion welds. The zones susceptible to corrosion may be identified by autoclave treatment but this is not convenient when extensive pressure circuits are being assembled by welding. It has been found that heat-affected zones susceptible to corrosion can be detected non-destructively by measuring the thermo-electric potential between a heated metallic point probe in contact with particular regions of the weld and adjacent metal. The construction of the thermo-electric probe is similar to one devised by the British Non-ferrous Metals Research Association for measuring plating thickness on metal substrates and a commercially available instrument incorporating this type of probe is, with simple modification, suitable for testing welds in Zr-Nb alloys. An example is given of the variation of probe response across the heat-affected zones of a weld and is compared with an autoclave test for corrosion. (author) [French] Un alliage zirconium-niobium a 2,5% Nb presente des avantages pour les circuits sous pression des reacteurs ralentis par de l'eau, du fait de la resistance mecanique que l'on peut obtenir par traitement thermique. La resistance a la corrosion de l'alliage dans les conditions de fonctionnement du reacteur est sensiblement affectee par le traitement thermique et des zones de faible resistance a la corrosion peuvent se produire au voisinage des soudures par fusion. On peut identifier ces zones par traitement en autoclave, mais cette methode n'est pas applicable dans le cas de longs circuits sous pression que l'on assemble par soudage. On a constate que les zones affectees par la chaleur qui sont susceptibles de corrosion pouvaient etre decelees par controle non destructif, en mesurant le potentiel thermoelectrique aux bornes d'une sonde metallique chauffee, en contact avec des parties determinees de la soudure et le metal adjacent. La sonde thermoelectrique est similaire a celle mise au point par l'Association britannique de recherches sur les metaux non ferreux en vue de mesurer l'epaisseur des revetements de plaques de metal; un instrument en vente sur le marche et muni de ce type de sonde peut etre utilise, apres une legere modification, pour le controle des soudures dans les alliages Zr-Nb. Le memoire donne un exemple de la variation de la reponse de la sonde dans des zones affectees par la chaleur lors du sondage; les resultats sont compares a ceux d'un examen en autoclave. (author) [Spanish] Las aleaciones de circonio con 2 Vulgar-Fraction-One-Half % de niobio ofrecen, gracias al tratamiento termico, la ventaja de resistir la presion en los reactores moderados por agua. Por otra parte, ese tratamiento afecta considerablemente a la resistencia a la corrosion en las condiciones de funcionamiento del reactor, siendo de seuealar que pueden surgir puntos especialmente vulnerables en las zonas de las soldaduras sometidas al calor. Las zonas susceptibles de corrosion pueden localizarse mediante tratamiento en autoclase, pero no es conveniente aplicarlo cuando extensos circuitos de presion se arman mediante soldadura. Se ha comprobado que las zonas afectadas por el calor que son vulnerables a la corrosion pueden localizarse por metodos no destructivos consistentes en medir el potencial termoelectrico entre la punta de una sonda metalica caliente en contacto con determinadas partes de la soldadura y el del metal adyacente. La sonda es analoga a la que ha diseueado la British-ferrous Metals Research Association para medir el espesor del chapado de sustratos metalicos. Los instrumentos comerciales equipados con ese tipo de sonda sirven con una sencilla modificacion, para examinar las soldaduras en las aleaciones de circonio y niobio. Se da un ejemplo de las variaciones en la respuesta de la sonda en las distintas partes de una soldadura afectadas por el calor, y se las compara con los resultados del estudio de la corrosion efectuado en autoclave. (author) [Russian] Ispol'zovanie splava iz cir- konija i 2,5% niobija dlja obolochki vysokogo davlenija v reaktorah s vodnym zamedlitelem imeet rjad preimushhestv, svjazannyh s prochnost'ju je t ogo splava blagodarja termoobrabotke. Termoobrabotka takzhe chuvstvitel'no vlijaet na korrozionnuju stojkost' splava v uslovijah raboty reaktora, i v zonah svarki plavleniem, kotorye podverzheny teplovomu vlijaniju, mogut pojavit'sja zony nizkoj korrozionnoj stojkosti. Zony, podverzhennye korrozii, mozhno usta- novit' putem obrabotki v avtoklave. Odnako je tot metod javljaetsja neudobnym v teh slucha- jah, kogda putem svarki sobirajutsja krupnogabaritnye kontury vysokogo davlenija. Prishli k vyvodu, chto zony teplovogo vozdejstvija, chuvstvitel'nye k korrozii, mozhno obnaruzhit' putem izmerenija termojelektricheskogo potenciala mezhdu nagretym metallicheskim tochech- nym zondom, kontaktirujushhimsja s opredelennymi oblastjami svarnogo shva, i primykajushhim k nemu metallom. Termojelektricheskij zond izgotavlivaetsja tak zhe, kak zond, kotoryj soz - dan Britanskoj associaciej po issledovanijam cvetnyh metallov dlja izmerenija tolshhiny pokrytija metallicheskih substratov. Imejushhijsja v prodazhe pribor, kotoryj vkljuchaet takoj zond s neznachitel'nymi vidoizmenenijami, mozhno ispol'zovat' dlja ispytanija svarnyh soedinenij iz cirkonij-niobij splavov. Privoditsja primer izmenenija zondovoj chuvstvitel'- nosti po zonam svarnogo shva, podverzhennym teplovomu vozdejstviju, i jet ot primer srav- nivaetsja s provedennym v avtoklave ispytaniem na korroziju. (author)}
place = {IAEA}
year = {1965}
month = {Oct}
}