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Titre du document / Document title

Columnar grain development in C-Mn-Ni low-alloy weld metals and the influence of nickel

Auteur(s) / Author(s)

ZHUYAO ZHANG ; FARRAR R. A. ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

Univ. Southampton, dep. mechanical eng., Southampton SO17 1BJ, ROYAUME-UNI

Résumé / Abstract

This paper discusses the development of columnar grains in as-deposited C-Mn-Ni(-Mo) low-carbon low-alloy weld metals and the influence of the alloying elements, particularly nickel. It was found that the austenite columnar grain size prior to the γ-α transformation of the weld metals was mainly controlled by the alloying contents rather than HAZ grains adjacent to the fusion boundaries, although the latter determined the size of the initial columnar grain size. The addition of nickel initially depressed the prior austenite grain size and subsequently dramatically coarsened it. This was related to the nickel equivalent (Nieq ) of the weld metals and the peritectic reaction during the solidification process. Small columnar grains were associated with a Nieq between 3.4 and 6.2% which resulted in a peritectic reaction when the weld melt solidified, whilst a Nieq higher than 6.2% produced very large columnar grains because the weld pool would directly solidify into austenite and have a subsequent continuous growth.

Revue / Journal Title

Journal of materials science    ISSN  0022-2461   CODEN JMTSAS 

Source / Source

1995, vol. 30, no22, pp. 5581-5588 (27 ref.)

Langue / Language

Anglais

Editeur / Publisher

Springer, Heidelberg, ALLEMAGNE  (1966) (Revue)

Mots-clés anglais / English Keywords

GTA welding

;

MMA welding

;

Columnar structure

;

Weld metal

;

Grain size

;

Composition effect

;

Nickel addition

;

Low alloy steel

;

Microstructure

;

Grain growth

;

Low carbon steel

;

Mots-clés français / French Keywords

Soudage TIG

;

Soudage manuel électrode enrobée

;

Structure basaltique

;

Métal fondu soudage

;

Grosseur grain

;

Effet composition

;

Addition nickel

;

Acier faiblement allié

;

Microstructure

;

Croissance grain

;

Acier bas carbone

;

Mots-clés espagnols / Spanish Keywords

Soldeo TIG

;

Soldadura a mano electrodo empotrado

;

Estructura columnar

;

Metal fundido soldeo

;

Grosor grano

;

Efecto composición

;

Adición niquel

;

Acero débilmente aliado

;

Microestructura

;

Crecimiento grano

;

Acero bajo carbono

;

Localisation / Location

INIST-CNRS, Cote INIST : 12733, 35400005918561.0030

Nº notice refdoc (ud4) : 2927523



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