Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Creep characterization of type 316LN and HT-9 stainless steels by the K-R creep damage model
Autore:
Kim, WG; Kim, SH; Ryu, WS;
Indirizzi:
Korea Atom Energy Res Inst, Dept Reactor Core Mat, Taejon 305600, South Korea Korea Atom Energy Res Inst Taejon South Korea 305600 305600, South Korea
Titolo Testata:
KSME INTERNATIONAL JOURNAL
fascicolo: 11, volume: 15, anno: 2001,
pagine: 1463 - 1471
SICI:
1226-4865(200111)15:11<1463:CCOT3A>2.0.ZU;2-B
Fonte:
ISI
Lingua:
ENG
Keywords:
creep behavior; damage parameter; type 316LN stainless steel; HT-9 stainless steel; Kachanov-Rabotnov (K-R) creep damage model; Monkman-Grant (M-G) strain;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
20
Recensione:
Indirizzi per estratti:
Indirizzo: Kim, WG Korea Atom Energy Res Inst, Dept Reactor Core Mat, POB 105, Taejon305600,South Korea Korea Atom Energy Res Inst POB 105 Taejon South Korea 305600 orea
Citazione:
W.G. Kim et al., "Creep characterization of type 316LN and HT-9 stainless steels by the K-R creep damage model", KSME INT J, 15(11), 2001, pp. 1463-1471

Abstract

The Kachanov and Rabotnov (K-R) creep damage model was interpreted and applied to type 316LN and HT-9 stainless steels. Seven creep constants of the model, A, B, k, m, lambda, r, and q were determined for type 316LN stainless steel. In order to quantify a damage parameter, the cavity was interruptedly traced during creep for measuring cavity area to be reflected into the damage equation, For type 316LN stainless steel, lambda=epsilon (R)/epsilon* and lambda (f)=epsilon/epsilon (R) were 3.1 and increased with creep strain. The creep curve with lambda =3.1 depicted well the experimental data tothe full lifetime and its damage curve showed a good agreement when r=24. However for the HT-9 stainless steel, the values of lambda and lambda (f) were different as lambda =6.2 and lambda (f) = 8.5, and their K-R creep curves did not agree with the experimental data. This mismatch in the HT-9 steel was due to the ductile fracture by softening of materials rather than thebrittle fracture by cavity growth. The differences of the values in the above steels were attributed to creep ductilities at the secondary and the tertiary creep stages.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/05/20 alle ore 17:05:03