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Titre du document / Document title

Effect of grain size on hydrogen embrittlement properties of 6061 aluminum alloys

Auteur(s) / Author(s)

OSAKI Shuhei (1) ; HARANO Thoru (2) ; IKEDA Jun (2) ; ICHITANI Kohji (3) ; ZHAO Pizhi (4) ; TAKESHIMA Yoshio (5) ;

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

(1) Graduate School of Science and Engineering, Yamaguchi University 2-16-1 Tokiwadai, Ube-shi, Yamaguchi 755-8611, JAPON
(2) Graduate School, Yamaguchi University, Ube-shi, Yamaguchi, JAPON
(3) Furukawa-sky Corp, Fukaya-shi, Saitama, JAPON
(4) Nippon Light Metal Co., Ltd, Shizuoka-shi, Shizuoka, JAPON
(5) Sumitomo Light Metals Ind., Ltd, Nagoya-shi, Aichi, JAPON

Résumé / Abstract

For 6061-T6 aluminum alloy plates with fine- or coarse-grained structure, SSRT (slow strain-rate technique) in humid air was carried out using a smooth or notched tensile specimen to evaluate the susceptibility to hydrogen embrittlement and to demonstrate the hydrogen effect on fracture process. The fine-grained materials under the hydrogen environment showed little change in tensile properties compared with the inert environment of dry nitrogen gas, while the coarse-grained materials exhibited some change in ductility; namely a decrease for the smooth specimen and an increase for the notched specimen. Although the materials ruptured by ductile fracture independently of grain size, the characteristic feature that coarse slips and void formation were promoted by hydrogen was observed. It is therefore suggested that the nature of hydrogen effect in 6061-T6 alloys is an enhancement of ductile fracture. As the increase in grain size leads to encourage the hydrogen effect, the grain coarsening should be restrained.

Revue / Journal Title

Keikinzoku    ISSN  0451-5994   CODEN KEIKA6 

Source / Source

2008, vol. 58, no4, pp. 139-145 [7 page(s) (article)] (19 ref.)

Langue / Language

Japonais

Editeur / Publisher

Keikinzoku Gakkai, c/o Hibiya Asahi Seimeikan, Keikinzoku Kyokai, Tokyo, JAPON  (1951) (Revue)

Mots-clés anglais / English Keywords

Mechanical properties

;

Aluminium base alloys

;

Ductile fracture

;

Hydrogen

;

Hydrogen embrittlement

;

Grain size

;

Microstructure

;

Mots-clés français / French Keywords

Propriété mécanique

;

Alliage base aluminium

;

Rupture ductile

;

Hydrogène

;

Fragilisation hydrogène

;

Grosseur grain

;

Microstructure

;

Mots-clés espagnols / Spanish Keywords

Propiedad mecánica

;

Ruptura dúctil

;

Hidrógeno

;

Fragilización hidrógeno

;

Grosor grano

;

Microestructura

;

Mots-clés d'auteur / Author Keywords

hydrogen embrittlement

;

6061

;

grain size

;

ductile fracture

;

SSRT test

;

Localisation / Location

INIST-CNRS, Cote INIST : 8276, 35400020027034.0010

Nº notice refdoc (ud4) : 20399080



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