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Metallurgical and Materials Transactions A
Erschienen in: Metallurgical and Materials Transactions A 7/2008

01.07.2008 | Symposium: Materials Behavior: Far from Equilibrium

Microscopic Properties of Long-Period Ordering in Al-Rich TiAl Alloys

verfasst von: S. Hata, T. Nakano, N. Kuwano, M. Itakura, S. Matsumura, Y. Umakoshi

Erschienen in: Metallurgical and Materials Transactions A | Ausgabe 7/2008

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Abstract

The ordering mechanism of long-period superstructures (LPSs) in Al-rich TiAl alloys has been investigated by high-resolution transmission electron microscopy (HRTEM). The LPSs are classified in terms of arrangements of base clusters with different shapes and compositions formed in Ti-rich (002) layers of L10-TiAl matrix: square Ti4Al, fat rhombus Ti3Al, and lean rhombus Ti2Al type clusters. The HRTEM observations revealed that antiphase boundaries of long-range-ordered LPS domains and short-range-ordered microdomains are constructed by various space-filling arrangements of the base clusters. Such a microscopic property characterized by the base clusters and their arrangements is markedly analogous to that of the \( {\left\langle {{\text{1,1/2,0}}} \right\rangle } \)* special-point ordering alloys such as Ni-Mo.
Vorheriger Artikel Characterization of Irradiated Microstructure by X-Ray Diffraction Line Profile Analysis
Nächster Artikel Monte Carlo Simulations of Ordering in Ni-Mo–Based Alloys

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Fußnoten
1
\( {\left\langle {{\text{1,1/2,0}}} \right\rangle } \) means the special-point vector with k = 1,1/2,0
 
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Metadaten
Titel
Microscopic Properties of Long-Period Ordering in Al-Rich TiAl Alloys
verfasst von
S. Hata
T. Nakano
N. Kuwano
M. Itakura
S. Matsumura
Y. Umakoshi
Publikationsdatum
01.07.2008
Verlag
Springer US
Erschienen in
Metallurgical and Materials Transactions A / Ausgabe 7/2008
Print ISSN: 1073-5623
Elektronische ISSN: 1543-1940
DOI
https://doi.org/10.1007/s11661-007-9397-x

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