Some long-period superstructures and the related motion of dislocations in Al-rich TiAl single crystals

Takayoshi Nakano, Satoshi Hata, Koutarou Hayashi, Yukichi Umakoshi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Various long-period superstructures that appear in Al-rich TiAl are composed of three pairs of primitive cells, Ti 2Al, Ti 3Al, and Ti 4Al, having periodic atomic arrangements in unique shapes of lean rhombi, fat rhombi, and squares, respectively, on the (002) Ti layers. These primitive cells can produce long-period superstructures such as Al 5Ti 3, Al 3Ti 2, and h-Al 2Ti. The long-period superstructures play an important role in the operative deformation mode, configuration of dislocations, and related plastic deformation behavior in Al-rich TiAl, depending on the Al concentration. Fourfold ordinary dislocations, for example, often move as a group in the Al 5Ti 3 superstructure in the shapes of lean rhombi and squares embedded in the L1 0 matrix. In this study, the relationship between the periodic long-period superstructures and dislocation motion will be discussed from the viewpoint of anti-phase boundaries that form in each superstructure and their energies. The plastic deformation behavior in Al 5Ti 3 and h-Al 2Ti single-phase single crystals is also discussed.

Original languageEnglish
Title of host publicationTMS 2012 - 141st Annual Meeting and Exhibition, Supplemental Proceedings
Pages797-804
Number of pages8
Volume2
Publication statusPublished - 2012
Event141st Annual Meeting and Exhibition, TMS 2012 - Orlando, FL, United States
Duration: Mar 11 2012Mar 15 2012

Other

Other141st Annual Meeting and Exhibition, TMS 2012
CountryUnited States
CityOrlando, FL
Period3/11/123/15/12

Fingerprint

Dislocations (crystals)
Plastic deformation
Single crystals
plastic deformation
single crystals
Phase boundaries
Oils and fats
antiphase boundaries
Fats
fats
cells
matrices
configurations
energy

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys

Cite this

Nakano, T., Hata, S., Hayashi, K., & Umakoshi, Y. (2012). Some long-period superstructures and the related motion of dislocations in Al-rich TiAl single crystals. In TMS 2012 - 141st Annual Meeting and Exhibition, Supplemental Proceedings (Vol. 2, pp. 797-804)

Some long-period superstructures and the related motion of dislocations in Al-rich TiAl single crystals. / Nakano, Takayoshi; Hata, Satoshi; Hayashi, Koutarou; Umakoshi, Yukichi.

TMS 2012 - 141st Annual Meeting and Exhibition, Supplemental Proceedings. Vol. 2 2012. p. 797-804.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Nakano, T, Hata, S, Hayashi, K & Umakoshi, Y 2012, Some long-period superstructures and the related motion of dislocations in Al-rich TiAl single crystals. in TMS 2012 - 141st Annual Meeting and Exhibition, Supplemental Proceedings. vol. 2, pp. 797-804, 141st Annual Meeting and Exhibition, TMS 2012, Orlando, FL, United States, 3/11/12.
Nakano T, Hata S, Hayashi K, Umakoshi Y. Some long-period superstructures and the related motion of dislocations in Al-rich TiAl single crystals. In TMS 2012 - 141st Annual Meeting and Exhibition, Supplemental Proceedings. Vol. 2. 2012. p. 797-804
Nakano, Takayoshi ; Hata, Satoshi ; Hayashi, Koutarou ; Umakoshi, Yukichi. / Some long-period superstructures and the related motion of dislocations in Al-rich TiAl single crystals. TMS 2012 - 141st Annual Meeting and Exhibition, Supplemental Proceedings. Vol. 2 2012. pp. 797-804
@inproceedings{e4608328cb994721a428263d136baae9,
title = "Some long-period superstructures and the related motion of dislocations in Al-rich TiAl single crystals",
abstract = "Various long-period superstructures that appear in Al-rich TiAl are composed of three pairs of primitive cells, Ti 2Al, Ti 3Al, and Ti 4Al, having periodic atomic arrangements in unique shapes of lean rhombi, fat rhombi, and squares, respectively, on the (002) Ti layers. These primitive cells can produce long-period superstructures such as Al 5Ti 3, Al 3Ti 2, and h-Al 2Ti. The long-period superstructures play an important role in the operative deformation mode, configuration of dislocations, and related plastic deformation behavior in Al-rich TiAl, depending on the Al concentration. Fourfold ordinary dislocations, for example, often move as a group in the Al 5Ti 3 superstructure in the shapes of lean rhombi and squares embedded in the L1 0 matrix. In this study, the relationship between the periodic long-period superstructures and dislocation motion will be discussed from the viewpoint of anti-phase boundaries that form in each superstructure and their energies. The plastic deformation behavior in Al 5Ti 3 and h-Al 2Ti single-phase single crystals is also discussed.",
author = "Takayoshi Nakano and Satoshi Hata and Koutarou Hayashi and Yukichi Umakoshi",
year = "2012",
language = "English",
isbn = "9781118296097",
volume = "2",
pages = "797--804",
booktitle = "TMS 2012 - 141st Annual Meeting and Exhibition, Supplemental Proceedings",

}

TY - GEN

T1 - Some long-period superstructures and the related motion of dislocations in Al-rich TiAl single crystals

AU - Nakano, Takayoshi

AU - Hata, Satoshi

AU - Hayashi, Koutarou

AU - Umakoshi, Yukichi

PY - 2012

Y1 - 2012

N2 - Various long-period superstructures that appear in Al-rich TiAl are composed of three pairs of primitive cells, Ti 2Al, Ti 3Al, and Ti 4Al, having periodic atomic arrangements in unique shapes of lean rhombi, fat rhombi, and squares, respectively, on the (002) Ti layers. These primitive cells can produce long-period superstructures such as Al 5Ti 3, Al 3Ti 2, and h-Al 2Ti. The long-period superstructures play an important role in the operative deformation mode, configuration of dislocations, and related plastic deformation behavior in Al-rich TiAl, depending on the Al concentration. Fourfold ordinary dislocations, for example, often move as a group in the Al 5Ti 3 superstructure in the shapes of lean rhombi and squares embedded in the L1 0 matrix. In this study, the relationship between the periodic long-period superstructures and dislocation motion will be discussed from the viewpoint of anti-phase boundaries that form in each superstructure and their energies. The plastic deformation behavior in Al 5Ti 3 and h-Al 2Ti single-phase single crystals is also discussed.

AB - Various long-period superstructures that appear in Al-rich TiAl are composed of three pairs of primitive cells, Ti 2Al, Ti 3Al, and Ti 4Al, having periodic atomic arrangements in unique shapes of lean rhombi, fat rhombi, and squares, respectively, on the (002) Ti layers. These primitive cells can produce long-period superstructures such as Al 5Ti 3, Al 3Ti 2, and h-Al 2Ti. The long-period superstructures play an important role in the operative deformation mode, configuration of dislocations, and related plastic deformation behavior in Al-rich TiAl, depending on the Al concentration. Fourfold ordinary dislocations, for example, often move as a group in the Al 5Ti 3 superstructure in the shapes of lean rhombi and squares embedded in the L1 0 matrix. In this study, the relationship between the periodic long-period superstructures and dislocation motion will be discussed from the viewpoint of anti-phase boundaries that form in each superstructure and their energies. The plastic deformation behavior in Al 5Ti 3 and h-Al 2Ti single-phase single crystals is also discussed.

UR - http://www.scopus.com/inward/record.url?scp=84860709250&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84860709250&partnerID=8YFLogxK

M3 - Conference contribution

SN - 9781118296097

VL - 2

SP - 797

EP - 804

BT - TMS 2012 - 141st Annual Meeting and Exhibition, Supplemental Proceedings

ER -