Plastic deformation behaviour and deformation substructure in Al-rich TiAl single crystals deformed at high temperatures

被引：0

作者：

Hayashi, K. ^{[1
]}

Nakano, T. ^{[1
]}

Umakoshi, Y. ^{[1
]}

机构：

[1] Osaka Univ, Grad Sch Engn, Dept Mat Sci & Engn, Suita, Osaka 5650871, Japan

来源：

SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS | 2001年 / 2卷 / 3-4期

关键词：

Titanium aluminide; High temperature deformation; Phase transformation; Slip system; Dislocation structure;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Plastic deformation behaviour in Ti-54.7 at.%Al and Ti-58.0 at.%Al single crystals was examined around and above the anomalous strengthening peak temperature (T-p) focusing on the effect of Al5Ti3 superstructure. The Al5Ti3 superstructure developed in the L1(0) matrix of Ti-58.0 at.%Al, and the size of the Al5Ti3 phase once increased during annealing at 800 degrees C and then decreased with increasing temperature, while no significant evidence of the Al5Ti3 particles was obtained in Ti-54.7 at.%Al from TEM observation although diffuse scattering corresponding to the spots for the Al5Ti3 superstructure was observed. The transition of slip plane for 1/2 < 110] ordinary dislocations from {111} to {110) and/or (001) occurred at and above T-p due to anisotropy of anti-phase boundary energies on {111}, {110) and (001) in the Al5Ti3 superstructure. Anomalous strengthening is related to the development of this superstructure which may assist the cross-slip of some parts of 1/2 < 110] ordinary dislocations onto {110) and/or (001) resulting in the formation of dragging points to the motion of the dislocations. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页数：9

共 50 条

[1] Plastic deformation behaviour and deformation substructure in Al-rich TiAl single crystals deformed at high temperatures
2001, Elsevier Ltd (02) : 3 - 4
[2] Plastic deformation behaviour and deformation substructure in Al-rich TiAl single crystals deformed at high temperatures Preface
Ono, Kouichi
SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS, 2001, 2 (3-4)
[3] Structure and deformation of Al-rich TiAl single crystals
Inui, H
Yamaguchi, M
PROPERTIES OF COMPLEX INORGANIC SOLIDS, 1997, : 309 - 320
[4] Phase stability and deformation of single crystals of TiAl with Al-rich compositions
Inui, H
Chikugo, K
Kishida, K
Yamaguchi, M
ELECTRON MICROSCOPY 1998, VOL 2: MATERIALS SCIENCE 1, 1998, : 175 - 176
[5] Properties of the deformation microstructure in Al-rich γ-TiAl deformed by ordinary dislocations
Grégori, F
Veyssière, P
MULTISCALE PHENOMENA IN MATERIALS-EXPERIMENTS AND MODELING, 2000, 578 : 187 - 192
[6] The deformation substructure in cyclically deformed TiAl PST crystals
Yasuda, HY
Nakano, T
Umakoshi, Y
PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES, 1996, 73 (04): : 1035 - 1051
[7] Fatigue behavior and deformation substructure of Ti3Al single crystals deformed at high temperatures
Umakoshi, Y
Koizumi, K
Nakano, T
THERMEC '97 - INTERNATIONAL CONFERENCE ON THERMOMECHANICAL PROCESSING OF STEELS AND OTHER MATERIALS, VOLS I-II, 1997, : 1433 - 1439
[8] The deformation substructure in cyclically deformed TiAl PST crystals
Yasuda, H. Y.
Nakano, T.
Umakoshi, Y.
Philosophical Magazine A: Physics of Condensed Matter, Defects and Mechanical Properties, 73 (04):
[9] The deformation substructure in cyclically deformed TiAl PST crystals
Dept. of Mat. Sci. and Engineering, Faculty of Engineering, Osaka University, 2-1, Yamada-Oka, Suita, Osaka 565, Japan
Philos. Mag. A Phys. Condens. Matter Struct. Defects Mech. Prop., 4 (1035-1051):
[10] Plastic deformation and fracture behaviour of Ti3Al single crystals deformed at high temperatures under cyclic loading
Koizumi, Y
Nakano, T
Umakoshi, Y
ACTA MATERIALIA, 1999, 47 (07) : 2019 - 2029

← 1 2 3 4 5 →