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Titolo:
gamma <->alpha(2) phase transformation in fractured high temperature stress rupture Ti-48Al-2Nb(at.%)
Autore:
Cheng, ZY; Du, XW; Zhu, J; Cao, CX; Sun, FS;
Indirizzi:
Tsing Hua Univ, Sch Mat Sci & Engn, Electron Microscopy Lab, Beijing 100084, Peoples R China Tsing Hua Univ Beijing Peoples R China 100084 ng 100084, Peoples R China Aeronaut Mat Res Inst, Beijing 100095, Peoples R China Aeronaut Mat Res Inst Beijing Peoples R China 100095 95, Peoples R China
Titolo Testata:
JOURNAL OF MATERIALS SCIENCE
fascicolo: 18, volume: 35, anno: 2000,
pagine: 4501 - 4505
SICI:
0022-2461(200009)35:18<4501:G<PTIF>2.0.ZU;2-B
Fonte:
ISI
Lingua:
ENG
Soggetto:
GAMMA-TIAL-ALLOY; INTERMETALLIC ALLOYS; CREEP-PROPERTIES; DEFORMATION; BEHAVIOR; MICROSTRUCTURE; COMPOUND;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
--discip_EC--
Citazioni:
22
Recensione:
Indirizzi per estratti:
Indirizzo: Zhu, J Tsing Hua Univ, Sch Mat Sci & Engn, Electron Microscopy Lab, Beijing 100084, Peoples R China Tsing Hua Univ Beijing Peoples R China 100084 84, Peoples R China
Citazione:
Z.Y. Cheng et al., "gamma <->alpha(2) phase transformation in fractured high temperature stress rupture Ti-48Al-2Nb(at.%)", J MATER SCI, 35(18), 2000, pp. 4501-4505

Abstract

The gamma <----> alpha(2) phase transformation in fractured high temperature stress rupture Ti-48Al-2Nb(at.%) alloy has been studied by analytical electron microscopy. alpha(2) and gamma phases were found at grain boundaries. alpha(2) layers that suspended in gamma layers and interfacial ledge higher than 2d((111)gamma) at gamma/alpha(2) interfaces were observed in the lamellar grains. These facts indicated that gamma <----> alpha(2) phase transformation and dynamic recrystallization have occurred during high temperature stress rupture deformation. It can be concluded that deformation inducedgamma <----> alpha(2) phase transformation and dynamic recrystallization resulted in the presence of gamma particles at grain boundaries. A structural and compositional transition area between deformation-induced alpha(2)(orgamma) and its adjacently original gamma(or alpha(2)) phases was found by HREM and EDS and is suggested as a way to transform between gamma and alpha(2) phase during high temperature stress rupture deformation. The transition area was formed by slide of partial dislocations on close-packed planes and diffusion of atoms. (C) 2000 Kluwer Academic Publishers.

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Documento generato il 29/09/20 alle ore 23:44:28