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Titolo:
Microstructures and mechanical properties of equal channel angular pressed5083 Al alloy
Autore:
Chang, SY; Lee, JG; Park, KT; Shin, DH;
Indirizzi:
Hanyang Univ, Dept Met & Mat Sci, Ansan 425791, Kyunggi Do, South Korea Hanyang Univ Ansan Kyunggi Do South Korea 425791 Kyunggi Do, South Korea Taejon Natl Univ Technol, Div Adv Mat Sci & Engn, Taejon 300717, South Korea Taejon Natl Univ Technol Taejon South Korea 300717 n 300717, South Korea
Titolo Testata:
MATERIALS TRANSACTIONS
fascicolo: 6, volume: 42, anno: 2001,
pagine: 1074 - 1080
SICI:
1345-9678(200106)42:6<1074:MAMPOE>2.0.ZU;2-V
Fonte:
ISI
Lingua:
ENG
Soggetto:
SEVERE PLASTIC-DEFORMATION; LOW-CARBON STEEL; ULTRAFINE-GRAINED MATERIALS; LOW-TEMPERATURE SUPERPLASTICITY; RESOLUTION ELECTRON-MICROSCOPY; STRAIN RATE SUPERPLASTICITY; COMMERCIAL ALUMINUM-ALLOYS; MG ALLOY; NANOSTRUCTURED MATERIALS; THERMAL-STABILITY;
Keywords:
equal channel angular pressing; ultra-fine grain structure; 5083 aluminium alloy; microhardness; tensile properties; low temperature superplasticity;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
58
Recensione:
Indirizzi per estratti:
Indirizzo: Chang, SY Hanyang Univ, Dept Met & Mat Sci, Ansan 425791, Kyunggi Do, South Korea Hanyang Univ Ansan Kyunggi Do South Korea 425791 o, South Korea
Citazione:
S.Y. Chang et al., "Microstructures and mechanical properties of equal channel angular pressed5083 Al alloy", MATER TRANS, 42(6), 2001, pp. 1074-1080

Abstract

An ultra-fine grained (UFG) structure was introduced in a commercial 5083 Al alloy with an initial grain size of similar to 200 mum using the equal channel angular pressing (ECAP) technique. ECAP was successfully conducted at 473 K on the same sample up to a total of 8 pressings through the die such that the sample was rotated 180 degrees around its longitudinal axis between pressings. The microstructure was reasonably homogeneous after a singlepressing and consisted of parallel bands of elongated substructure having an average width of 0.2 mum and an average length of 0.8 mum. An equiaxed ultra-fine grained structure of similar to 0.3 mum was obtained in the present alloy after 4 pressings. The ultra-fine grains were thermally stable at 523 K. The yield stress of as-received 5083 Al alloy was 129 MPa, whereas it increased to 249 MPa after a single pressing and finally became 290 MPa after 8 pressings, which was superior to that of a conventional 5083-H321 Alalloy. In addition, in this study, the feasibility of low temperature superplasticity of a UFG 5083 Al alloy was examined. It was found that the 5083Al alloy with a grain size of similar to 0.3 mum exhibited a superplastic-like behavior with elongation to failure in excess of 200% below 523 It.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/09/20 alle ore 20:06:31