Plastic Deformation of Nanostructured Materials: 1st Edition (Hardback) book cover

Plastic Deformation of Nanostructured Materials

1st Edition

By A.M. Glezer, E.V. Kozlov, N.A. Koneva, N. A. Popova, I. A. Kurzina

CRC Press

334 pages

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Hardback: 9781138077898
pub: 2017-08-10
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Description

Plastic Deformation of Nanostructured Materials offers comprehensive analysis on the most important data and results in the field of materials strength and mechanics. This reference systematically examines the special features of the mechanical behavior and corresponding structural mechanisms of crystal structure defects with grain sizes that range from meso- to micro- levels.

Table of Contents

Introduction

Stages of plastic deformation of polycrystalline materials

Introduction. Description of the problem

Main stages of plastic deformation of polycrystals at the mesolevel

Determination of the plastic deformation stages in FCC metals and solid solutions

Some historical data for the determination of the stages II–IV of plastic deformation in polycrystalline materials

Individual stages of plastic deformation in the BCC metals and alloys

Build up of dislocations, internal stress fields and evolution of the dislocation structure

Evolution of the substructure – the basics of the physics of stages in gliding of total dislocations

Transition to twinning and deformation martensitic transformation as an important factor of formation of stages of strain hardening

Localisation of deformation – another reasons for the formation of new stages

Factors complicating the characteristics of the deformation

Stages in mesopolycrystals

Effect of the mesograin size on the individual stages of plastic deformation

Changes of the structure of the polycrystalline aggregate and the pattern of the deformation stages with a decrease of the average grain size

The main factors determining the stages of deformation and the value of the strain hardening coefficient in the microrange

Problem of determination of the grain size at the microlevel

Identification of plastic deformation stages at the microlevel

The stress strain & dependence for copper polycrystals with different nanograin sizes

Relationships of strain hardening of copper micro-polycrystals with different grain sizes

Hardening mechanisms and special features of the individual stages of deformation of the crystals with nanograins

Effect of different hardening mechanisms on the flow stress and the form of the σ=f(ε) dependence

Basic pattern of strain hardening of nanocrystals

Effect of the grain size on the parameters of plastic deformation stages

The structure and mechanical properties of nanocrystals

Introduction

Classification of polycrystals on the basis of the grain size

Methods for producing ultrafine-grained and nanograin polycrystalline materials

The structure of polycrystalline materials

Triple junctions in grains

Models of polycrystalline grains at the meso- and microlevel

The structure of individual nanograins

Special features of the structure of the nanopolycrystalline aggregate as a consequence of high plastic strains

Dependence of the dislocation density on the grain size and the problem of fine grains without dislocations

Critical size ranges of the grains and areas with grains

The Hall–Petch relation and its parameter σ in a wide grain size range

The mechanisms of implementation of the Hall–Petch relation at the mesolevel

Dependence of coefficient k on the grain size in the Hall–Petch relation

Problem of the transition of coefficient k to negative value.

The first critical grain size

Mechanisms of realisation of the Hall–Petch relation at the microlevel

Mechanisms providing contribution to the grain boundary sliding process

The number of dislocations in the shear zone and the stress, required for the formation of this zone

Contact stresses. Conventional and accommodation sliding

Conclusion

Main components of the dislocation structure and the role of the dimensional factor

Problem of classification of dislocation structure components

Components of the dislocation structure

Strain gradient, the density of geometrically necessary and excess dislocations

Grain size and the density of geometrically necessary dislocations

Methods of measuring the density of geometrically necessary dislocations

The scalar density of dislocations in dislocation fragments with different types of substructure

Dependence of the scalar density of the dislocations on the size of the fragments with the network dislocation substructure in a martensitic steel

Dependence of dislocation density on the size of fragments with the cellular dislocation substructure in the martensitic steel

Effect of the size of the fragments in grains on the density of defects in metallic materials

The role of geometrically necessary dislocations in the formation of deformation substructures

Buildup of geometrically necessary dislocations and scalar dislocation density. The role of boundaries of different type

Concentration dependence of the main parameters of the dislocation structure in the FCC solid solutions

Cellular substructure: discloaction density and the cell size

Dislocation structure and internal stress fields

Introduction

Methods for measuring internal stresses

Structure of ultrafine-grained metals and alloys

Sources of internal stress fields in ultrafine-grained materials

Distribution of internal stresses in grains. The scheme of the grains of ultrafine-grained materials

Conclusions

Severe plastic deformation

Introduction

Terminology

Structural models

Energy principles of the mechanical effect on the solid

Low-temperature dynamic recrystallisation

Amorphisation and crystallisation during SPD

Effect of the divisibility and direction of deformation

The principle of cyclicity in severe plastic deformation

Conclusions

Effect of ion implantation on structural state, phase composition and the strength of modified metal surfaces

Introduction

Effect of ion implantation on the structure of titanium alloys

Distribution of implanted elements in the thickness of the implanted layer of titanium alloys

Effect of ion implantation on the phase composition of the surface layers of titanium alloys

Modification of the physical–mechanical properties of titanium lloys by the ion implantation conditions

Grain boundary engineering and superhigh strength of nanocrystals

Subject Categories

BISAC Subject Codes/Headings:
SCI013000
SCIENCE / Chemistry / General
TEC021000
TECHNOLOGY & ENGINEERING / Material Science
TEC023000
TECHNOLOGY & ENGINEERING / Metallurgy
TEC027000
TECHNOLOGY & ENGINEERING / Nanotechnology & MEMS