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WELDING DEFECT [5 records]

Record 1 2011-06-07

English

Subject field(s)
  • Joining Processes (Metals)
DEF

A discontinuity or discontinuities which by nature or accumulated effect (for example, total crack length) render a part or product unable to meet minimum acceptance standards or specifications. [Definition standardized by the AWS.]

OBS

defect : term standardized by the American Welding Society(AWS).

OBS

defect: term standardized by the CSA International. Material reproduced with the permission of the copyright holder, the Canadian Standards Association (CSA), 178 Rexdale Blvd., Toronto, Ontario, Canada M9W 1R3. However, CSA shall not be responsible for the manner in which the information is presented, nor for any interpretations thereof. This CSA material may not have been updated to reflect amendments subsequently made to the original content. For further information, contact CSA International.

OBS

defect: term officially approved by the Lexicon Project Committee (New Brunswick).

French

Domaine(s)
  • Assemblage des métaux
DEF

Discontinuité dont les caractéristiques (nature, taille, orientation, position, etc.) rendent un produit inacceptable selon les exigences minimales prescrites dans les cahiers des charges, spécifications, normes ou codes applicables. [Définition normalisée par la CSA International.]

OBS

défaut : terme normalisé par la CSA International. Reproduit avec l'autorisation de l'Association canadienne de normalisation (CSA), 178, boul. Rexdale, Toronto (Ontario), Canada M9W 1R3 (détentrice des droits d'auteur). La CSA décline toute responsabilité quant à la façon dont la matière est présentée et quant à toute interprétation pouvant en découler. L'information reproduite pourrait ne pas être à jour. Pour plus de renseignements, communiquer avec la CSA.

OBS

défaut : terme uniformisé par le Comité du projet de lexiques (Nouveau-Brunswick).

Spanish

Save record 1

Record 2 2011-05-05

English

Subject field(s)
  • Welding and Soldering (Metals)
DEF

A crack formed in a weldment due to the segregation of low-melting constituents in the weld metal at grain boundaries.

OBS

This type of defect is caused by grain-boundary tearing under thermal contraction stresses. It may be prevented by the use of low-impurity welding materials and proper joint design.

OBS

hot cracking: term standardized by the CSA International. Material reproduced with the permission of the copyright holder, the Canadian standards Association (CSA), 178 Rexdale Blvd., Toronto, Ontario, Canada M9W 1R3. However, CSA shall not be responsible for the manner in which the information is presented, nor for any interpretations thereof. This CSA material may not have been updated to reflect amendments subsequently made to the original content. For further information contact CSA International.

Key term(s)
  • solidification crackinghot

French

Domaine(s)
  • Soudage (Métal)
CONT

Au fur et à mesure que se forme et se déplace le bain de fusion, les grains de solidification [...] se développent [Ces deux processus peuvent favoriser la fissuration à chaud].

OBS

fissuration à chaud : terme normalisé par la CSA International. Reproduit avec l'autorisation de l'Association canadienne de normalisation (CSA), 178, boul. Rexdale, Toronto (Ontario), Canada M9W 1R3 (détentrice des droits d'auteur). La CSA décline toute responsabilité quant à la façon dont la matière est présentée et quant à toute interprétation pouvant en découler. L'information reproduite pourrait ne pas être à jour. Pour plus de renseignements, communiquer avec la CSA International.

Spanish

Save record 2

Record 3 2010-12-09

English

Subject field(s)
  • Welding and Soldering (Metals)
  • Nuclear Fission Reactors
DEF

A defect triggered in the root pass of a weld in the immediate neighbourhood of the contact zone, and which spreads radially between the grains when under stress in service.

OBS

[Delayed re-heat cracking] only occurs with certain materials such as 321 type stainless steel, as it is caused by hardening of the steel due to fine precipitations of titanium carbide inside the crystalline structure. The hardening causes the plastic deformation capacity to be transferred to the periphery of the grains. For this to happen, the following conditions have to be met : a high operating temperature([higher than] 475°C for 321 steel), a geometrical discontinuity at the weld root, strain hardening at the weld root showing significant shrinkage, heavy local load, which may be due to welding stresses, a defect in the weld root(e. g. a small shrinkage crack).

Key term(s)
  • delayed reheat cracking

French

Domaine(s)
  • Soudage (Métal)
  • Réacteurs nucléaires de fission

Spanish

Save record 3

Record 4 1993-04-22

English

Subject field(s)
  • Copper and Copper Alloys (Metallurgy)
DEF

A surface defect resembling a seam, caused by folding over a hot metal fin or sharp corner and then rolling or forging it onto the surface of the piece without welding.

French

Domaine(s)
  • Cuivre et alliages du cuivre (Métallurgie)
DEF

Défaut de surface semblable à un joint, résultant du pliage d'une bavure ou d'un coin vif de métal chaud qui est ensuite laminé ou forgé à la surface de la pièce sans opération de soudage.

Spanish

Save record 4

Record 5 1985-10-23

English

Subject field(s)
  • Tracks and Roadways (Rail Transport)
DEF

Surface fold of material produced in a forming operation (forging, rolling, pressing, drawing, etc.). In hot forming the surfaces oxidise. (OREU-79, no. 1005) (RAIL)

DEF

A surface defect on metal appearing as a seam caused from folding over hot metal, fins, or sharp corners and then rolling or forging, but not welding them to the surface(TRCY 79 XV).

French

Domaine(s)
  • Voies ferrées
DEF

Défaut superficiel apparaissant comme une fissure sur les pièces travaillées à chaud (forgeage, laminage, estampage, matriçage, etc.) et consistant en un repli oxydé de la peau. (OREU-79 n. 1005)

DEF

Défaut de laminage.

OBS

Terme uniformisé par le CN

Spanish

Save record 5

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