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Titolo:
ATOMIC-SCALE INVESTIGATION OF ORDERING AND PRECIPITATION PROCESSES INA MODEL NI-CR-AL ALLOY
Autore:
SCHMUCK C; DANOIX F; CARON P; HAUET A; BLAVETTE D;
Indirizzi:
UFR SCI UNIV ROUEN,URA CNRS 808,LMIE F-76821 MONT ST AIGNAN FRANCE OFF NATL ETUD & RECH AEROSP CHATILLON FRANCE
Titolo Testata:
Applied surface science
, volume: 94-5, anno: 1996,
pagine: 273 - 279
SICI:
0169-4332(1996)94-5:<273:AIOOAP>2.0.ZU;2-Y
Fonte:
ISI
Lingua:
ENG
Soggetto:
PROBE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
10
Recensione:
Indirizzi per estratti:
Citazione:
C. Schmuck et al., "ATOMIC-SCALE INVESTIGATION OF ORDERING AND PRECIPITATION PROCESSES INA MODEL NI-CR-AL ALLOY", Applied surface science, 94-5, 1996, pp. 273-279

Abstract

The tomographic atom probe has been applied to the study of early stages of precipitation of the Ni3Al-type ordered gamma' phase in a modelnickel base superalloy Ni-Cr-Al. The investigation of a low-supersaturated alloy (15 at% Cr, 5 at% Al) aged at 600 degrees C shows that small gamma' particles 2 nm in diameter form already after 1 h. Even for such very small sizes, particles are well ordered. Their composition is close to the equilibrium composition of the gamma' phase and does not evolve as ageing proceeds. The time evolution of the particle size and of the composition of the gamma matrix suggests that a growth mechanism is involved before 4 h, followed by a coarsening regime.

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Documento generato il 03/12/20 alle ore 16:08:38