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Titolo:
The effect of local composition on defect structure in a near-gamma-TiAl alloy with duplex microstructure
Autore:
Chen, SH; Schumacher, G; Mukherji, D; Frohberg, G; Wahi, RP;
Indirizzi:
Hahn Meitner Inst Berlin GmbH, D-14109 Berlin, Germany Hahn Meitner Inst Berlin GmbH Berlin Germany D-14109 109 Berlin, Germany Bundesanstalt Mat Forsch & Prufung, D-12205 Berlin, Germany Bundesanstalt Mat Forsch & Prufung Berlin Germany D-12205 erlin, Germany Tech Univ Carolo Wilhelmina Braunschweig, Inst Werkstoffe, D-38023 Braunschweig, Germany Tech Univ Carolo Wilhelmina Braunschweig Braunschweig Germany D-38023 ny Tech Univ Berlin, D-10623 Berlin, Germany Tech Univ Berlin Berlin Germany D-10623 Berlin, D-10623 Berlin, Germany
Titolo Testata:
PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS ANDMECHANICAL PROPERTIES
fascicolo: 11, volume: 81, anno: 2001,
pagine: 2653 - 2664
SICI:
1364-2804(200111)81:11<2653:TEOLCO>2.0.ZU;2-6
Fonte:
ISI
Lingua:
ENG
Soggetto:
TERNARY ADDITIONS; AL ALLOYS; DEFORMATION MECHANISMS; ELECTRON-DIFFRACTION; LATTICE-PARAMETERS; PHASE; SOLIDIFICATION; DISLOCATIONS; TI3AL;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
40
Recensione:
Indirizzi per estratti:
Indirizzo: Chen, SH Hahn Meitner Inst Berlin GmbH, Glienicker Str 100, D-14109 Berlin, Germany Hahn Meitner Inst Berlin GmbH Glienicker Str 100 Berlin Germany D-14109
Citazione:
S.H. Chen et al., "The effect of local composition on defect structure in a near-gamma-TiAl alloy with duplex microstructure", PHIL MAG A, 81(11), 2001, pp. 2653-2664

Abstract

The chemical compositions and lattice parameters have been measured locally in primary equiaxed gamma grains and in lamellar gamma laths of a near-gamma -TiAl alloy with duplex microstructure. The measurements were performedby means of energy-dispersive X-ray spectroscopy and convergent-beam electron diffraction respectively. It was found that the local compositions as well as the lattice parameters are different in primary and lamellar gamma grains. In lamellar gamma laths the concentration of Al is lower and the Nb concentration is higher than in the primary g grains, while the concentrations of Ti and Mn are the same in both kinds of grain. The tetragonality in the gamma laths was found to be lower than in the primary grains. The differences in chemical composition are suggested to be mainly responsible for the different deformation substructures in primary and lamellar gamma grainsreported in the literature while the differences in lattice parameters play only a minor role.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/11/20 alle ore 18:57:55