Fundamental Aspects of Dislocation Interactions: Low-Energy Dislocation Structures IIIG. Kostorz, H. A. Calderon, J. L. Martin Fundamental Aspects of Dislocation Interactions: Low-Energy Dislocation Structures III covers the papers presented at a European Research Conference on Plasticity of Materials-Fundamental Aspects of Dislocation Interactions: Low-Energy Dislocation Structures III, held on August 30-September 4, 1992 in Ascona, Switzerland. The book focuses on the processes, technologies, reactions, transformations, and approaches involved in dislocation interactions. The selection first offers information on work softening and Hall-Petch hardening in extruded mechanically alloyed alloys and dynamic origin of dislocation structures in deformed solids. Discussions focus on stress-strain behavior in relation to composition, structure, and annealing; comparison of stress-strain curves with work softening theory; sweeping and trapping mechanism; and model of dipolar wall structure formation. The text then ponders on plastic instabilities and their relation to fracture and dislocation and kink dynamics in f.c.c. metals studied by mechanical spectroscopy. The book takes a look at misfit dislocation generation mechanisms in heterostructures and evolution of dislocation structure on the interfaces associated with diffusionless phase transitions. Discussions focus on dislocation representation of a wall of elastic domains; equation of equilibrium of an elastic domain; transformation of dislocations; and theoretical and experimental background. The selection is a valuable reference for readers interested in dislocation interactions. |
Contents
| 1 | |
| 15 | |
| 23 | |
| 35 | |
| 42 | |
Chapter 6 Screened disclinations in solids | 58 |
Chapter 7
Mechanisms of yield stress anomalies in beryllium and Ni3 Al | 69 |
Chapter 8 Collective behavior and superdislocation motion in Ll2 alloys | 82 |
Chapter 39 Dislocationcontrolled stable crack growth in Mo and MgO | 270 |
Chapter 40 Lowenergy dislocations and ductility of ferritic steels | 275 |
Chapter 41 The peak of flow stress in the L12 structure and the elimination of KearWilsdorf locks | 281 |
Chapter 42 Calculation of crossslip parameters in fcc crystals | 286 |
Chapter 43 Modelling high temperature creep of academic and industrial materials
using the composite model | 290 |
Chapter 44 Dynamical model of the wall structure in persistent slip bands of fatigued metals
I Dynamical model of edge dislocation walls | 295 |
Chapter 45 Investigation of the formation of dislocation cell structures and the
strain hardening of metals by computer simulation | 300 |
Chapter 46 Role of the secondary slip system in a computer simulation model of the
plastic behaviour of single crystals | 306 |
a high resolution electron microscopy study | 93 |
Chapter 10 Misfit dislocation generation mechanisms in heterostructures | 101 |
Chapter 11 Evolution of dislocation structure on the interfaces associated with
diffusionless phase transitions | 111 |
nucleation and growth
an experimental study in silicon | 118 |
Chapter 13 Dislocation dynamics and brittletoductile transitions | 135 |
Chapter 14 Internal stresses and scaling laws | 141 |
Chapter 15 Deformation structure and properties of ceramics and crystals of highTc superconductors | 146 |
Chapter 16 Structure and mobility of polygonized dislocation walls in high purity
aluminium | 153 |
Chapter 17 Deformation mechanisms of a ferriticmartensitic steel between
290 and 870 K | 159 |
Chapter 18 On the effect of nitrogen on the dislocation structure of austenitic
stainless steel | 164 |
Chapter 19 Dislocation cell structures in copper in torsion and tension | 170 |
Chapter 20 Dislocation distributions as seen by Xray line profiles | 175 |
Chapter 21 The influence of dislocations on electrical resistivity anomalies in
palladium alloys | 180 |
Chapter 22 Dislocation structure in Ll2 longrangeordered Ni3AlTi deformed in the temperature regime between 196
C and 800 C | 186 |
Chapter 23 Dynamic recovery of the microstructure of screw dislocations in high
purity bcc metals | 191 |
an in situ transmission electron microscopy study | 196 |
Chapter 25 Effect of precipitation on the development of dislocation substructure in
low carbon steels during cold deformation | 201 |
Chapter 26 Transformation of dislocation patterns in fatigued copper single crystals | 206 |
Chapter 27 Dislocation activity and differences between tensile and compressive
creep of yttria doped alumina | 211 |
Chapter 28 High temperature deformation behavior of an AlFeVSi alloy | 216 |
Chapter 29 Dislocationassociated elastic energy storage in mechanical
deformations | 220 |
Chapter 30 Dislocation structure and corduroy contrast in a 316L alloy fatigued at 0305
Tm | 226 |
Chapter 31 On sequences of stable and unstable regions of flow along stressstrain
curves of solid solutionsexperiments on CuMn polycrystals | 230 |
Chapter 32 Plastic deformation of single glide oriented Cu2 to 15atAl crystals at
elevated temperatures | 235 |
Chapter 33 Onset mechanisms of discontinuous flow at low temperatures in one and twophase CuBe alloys | 240 |
Chapter 34 Hardening and softening in ZrSn polycrystals | 246 |
kinetic and
statistical properties observed by means of electronic response | 252 |
Chapter 36 Rheological behaviour of mild steel under monotonie loading conditions
and crossloading | 255 |
Chapter 37 The PortevinLe Châtelier effect in Al292Mg38Mn alloy and
linear location of acoustic emission | 260 |
Chapter 38 Stress corrosion microcleavage in a ductile fcc
alloy | 266 |
Chapter 47 Lowtemperature dislocation internal friction in crystals | 312 |
Chapter 48 Ultrasonic study of the interaction potential between a dislocation and asingle solute atom | 316 |
Chapter 49 Effects of magnetic fields on the dislocation unlocking fromparamagnetic centers in nonmagnetic crystals | 322 |
Chapter 50 A dislocation model for internal damping due to the thermal expansion
mismatch between matrix and particles in microheterogeneous ma... | 327 |
Chapter 51 Interaction between dislocations and precipitates in an AlLi alloy | 332 |
Chapter 52 Comparison between simulation calculations and measurements concerning athermal yielding of precipitation hardening of
CuCo single c... | 340 |
Chapter 53 Dislocationpoint defects interaction in semiconductors and kink
mobility | 346 |
Chapter 54 Softening of áiron by solute nitrogen atoms investigated between 30
and 300 K by use of stressrelaxation measurements | 350 |
Chapter 55 Mechanisms of dislocation motion and multiplication in ionic and
semiconductor crystals | 356 |
Chapter 56 Dislocation substructures in plastically deformed A1N | 360 |
Chapter 57 The influence of Peierls relief on lowtemperature plasticity of CdTe
single crystals | 364 |
Chapter 58 A new internal friction peak and the problem of the Peierls potential in
fcc metals | 368 |
Chapter 59 A method for simulating electron microscope dislocation images | 373 |
Chapter 60 On the relationship between unusual mechanical properties and
deformation substructures in ordered Ni3Al | 379 |
Chapter 61 A weak beam study of the dislocation structure in directionally solidified
Ni3Al during deformation | 384 |
Chapter 62 Dislocation core structures in the ordered intermetallic alloy TiAl | 391 |
Chapter 63 Observations of dislocations relevant to the anomalous yield stress in
Ll2 alloys | 395 |
Chapter 64 Transmission electron microscope in situ deformation of MC2
superalloy at room temperature | 401 |
Chapter 65 Substructure of dislocations in the 111 plane in Ni3Ga single crystals | 407 |
Chapter 66 The stress fields of edge dislocations near wedgeshaped boundaries
and bonded wedges | 411 |
Chapter 67 Interactions between lattice dislocations and grain boundaries in Ll2 ordered compounds investigated by in situ transmission electron
mic... | 415 |
Chapter 68 Arrangement of misfit dislocations at Ti3AlTiAl phase boundaries | 421 |
the elastic modulus effect | 428 |
Chapter 70 Misfit dislocations and other defects in thin films | 433 |
Chapter 71 Twin propagation in TiAl | 438 |
Chapter 72 Changes in stacking fault sequences during the martensitic phase
transformation in CuZnAl shape memory alloys | 443 |
Chapter 73 Twins and properties of classical and high Tc superconductors | 449 |
| 454 | |
| 455 | |
Common terms and phrases
Acta Metall activation energy alloys amplitude annealing applied stress atoms bands behaviour Burgers vector calculated cell configuration corresponding crack tip cross-slip curve decrease dipole disclination dislocation density dislocation structure dynamic edge dislocations effect elastic Elsevier Sequoia energy experimental flow stress formation fracture glide plane grain boundaries hardening increase influence interaction interface internal friction internal stresses kink lattice loading low temperature macrokinks martensitic materials measured mechanism microscopic microstructure misfit mobile modulus nucleation observed obstacles obtained parameters partial peak Peierls Philos Phys pile-up pinning points plastic deformation point defects propagation PSBs relaxation samples screw dislocations segments shear modulus shear stress shown in Fig simulation single crystals slip bands slip plane slip systems Solid solute specimens stacking fault strain rate subgrain superdislocation superkinks surface tensile thermally activated tion transmission electron microscopy twin values walls yield stress