Role of vacancies in work hardening and fatigue of TiAl alloys

被引：22

作者：

Appel, F. ^{[1
]}

Herrmann, D. ^{[1
]}

Fischer, F. D. ^{[2
]}

Svoboda, J. ^{[3
]}

Kozeschnik, E. ^{[4
]}

机构：

[1] Helmholtz Zentrum Geesthacht, Inst Mat Res, D-21502 Geesthacht, Germany

[2] Montan Univ Leoben, Inst Mech, A-8700 Leoben, Austria

[3] Acad Sci Czech Republ, Inst Phys Mat, CZ-61662 Brno, Czech Republic

[4] Vienna Univ Technol, Inst Mat Sci & Technol, A-1040 Vienna, Austria

来源：

INTERNATIONAL JOURNAL OF PLASTICITY | 2013年 / 42卷

关键词：

Dislocations; Cyclic loading; Metallic material; Electron microscopy; Analytic functions; CROSS-SLIP PLANES; DEFORMATION MECHANISMS; ELECTRON-MICROSCOPE; SCREW DISLOCATIONS; TITANIUM; MICROSTRUCTURE; ENERGY; ANNIHILATION; TEMPERATURE; DIFFUSION;

D O I：

10.1016/j.ijplas.2012.10.001

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The role of vacancies in work hardening and fatigue of TiAl alloys was investigated by mechanical testing and TEM examination of deformed samples. The evolution of the dislocation glide resistance during straining and after recovery was analysed in terms of thermodynamic glide parameters. Strain path change tests with respect to temperature and recovery experiments were performed in order to characterize the thermal stability of the produced defect structures. The recovery of the deformation induced defect structure was observed by TEM in situ heating experiments. The recovery kinetics is described on the basis of a recently published simulation study of vacancy annihilation. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：83 / 100

页数：18

共 50 条

[1] [Anonymous], 1992, THEORY DISLOCATIONS
[2] Work hardening and recovery of gamma base titanium aluminides
Appel, F
Sparka, U
Wagner, R
[J]. INTERMETALLICS, 1999, 7 (3-4) : 325 - 334
[3] Thermally activated deformation mechanisms in micro-alloyed two-phase titanium aluminide alloys
Appel, F
Lorenz, U
Oehring, M
Sparka, U
Wagner, R
[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1997, 233 (1-2): : 1 - 14
[4] Microstructure and deformation of two-phase γ-titanium aluminides
Appel, F
Wagner, R
[J]. MATERIALS SCIENCE & ENGINEERING R-REPORTS, 1998, 22 (05) : 187 - 268
[5] An electron microscope study of mechanical twinning and fracture in TiAl alloys
Appel, F
[J]. PHILOSOPHICAL MAGAZINE, 2005, 85 (2-3) : 205 - 231
[6] ON THE INTERSECTION OF OBLIQUE SCREW DISLOCATIONS IN NACL SINGLE-CRYSTALS
APPEL, F
[J]. PHYSICA STATUS SOLIDI A-APPLIED RESEARCH, 1989, 116 (01): : 153 - 163
[7] AN ELECTRON-MICROSCOPE STUDY OF THE ORIGIN OF LATENT HARDENING IN NACL
APPEL, F
[J]. PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES, 1991, 63 (01): : 71 - 85
[8] Appel F, 1995, GAMMA TITANIUM ALUMINIDES, P231
[9] Electron microscope characterization of low cycle fatigue in a high-strength multiphase titanium aluminide alloy
Appel, Fritz
Heckel, Thomas K.
Christ, Hans-Juergen
[J]. INTERNATIONAL JOURNAL OF FATIGUE, 2010, 32 (05) : 792 - 798
[10] ANISOTROPIC ELASTIC ENERGY OF A RHOMBUS-SHAPED DISLOCATION LOOP
BACON, DJ
BULLOUGH, R
WILLIS, JR
[J]. PHILOSOPHICAL MAGAZINE, 1970, 22 (175): : 31 - &

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