Internal Friction of Materials 1st Edition by Anton Puskar ISBN 1898326509 978-1898326502

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Product details: 

ISBN 10: 1898326509 

ISBN 13: 978-1898326502

Author:  Anton Puskar

Without understanding the nature and mechanisms of anelasticity and the effect of various factors on internal friction, it is difficult to solve the problems of using internal friction measurement for evaluating the structural stability of alloys, cyclic microplasticity and for better understanding the processes associated with the response of materials to single or repeated loading. The author presents important new results for the relationship between internal friction and the defect of the elasticity modulus with many principal processes such as plastic deformation, effect of temperature of plastic deformation, effects on the structural stability of alloys and composites up to cyclic microplasticity. The existence of critical strain amplitudes is discussed and supported by experiments, and attention is given to the link of cyclic microplasticity with dislocation density and activation volume of plastic deformation up to the effect of individual factors on the cyclic plastic response of the material. The relationship of the process of mechanical fatigue of the material with internal friction and the defect of the elasticity modulus is discussed. The author proposes a new fatigue life equation which has been verified by a large number of experiments.

Table of contents: 

1 AIMS OF INTERNAL FRICTION MEASUREMENTS
2 NATURE AND MECHANISMS OF ANELASTICITY
2.1 ELASTICITY CHARACTERISTICS
2.1.1 Effect on elasticity characteristics

2.1.2 Elasticity characteristics of structural materials

2.1.3 Elasticity characteristics of composite materials

2.2 MANIFESTATION OF ANELASTICITY
2.2.1 Delay of deformation in relation to stress

2.2.2 Internal friction

2.2.3 Mechanisms of energy scattering in the material

2.3 DEFECT OF THE YOUNG MODULUS
3 FACTORS AFFECTING ANELASTICITY OF MATERIALS
3.1 INTERNAL FRICTION BACKGROUND
3.1.1 The substructural and structural state of material

3.1.2 Vacancy mechanism

3.1.3 Diffusion-viscous mechanism

3.1.4 Dislocation mechanisms

3.1.5 The relaxation mechanism

3.2 EFFECT OF TEMPERATURE ON INTERNAL FRICTION
3.2.1 Mechanisms associated with point defects

3.2.2 Dislocation relaxation mechanisms

3.3 EFFECT OF STRAIN AMPLITUDE
3.3.1 The Granato–Lücke spring model

3.3.2 Thermal activation

3.3.3 Internal friction with slight dependence on strain amplitude

3.3.4 Plastic internal friction

3.4 EFFECT OF LOADING FREQUENCY
3.5 EFFECT OF LOADING TIME
3.6 EFFECT OF MAGNETIC AND ELECTRIC FIELDS
4 MEASUREMENTS OF INTERNAL FRICTION AND THE DEFECT OF THE YOUNG MODULUS
4.1 APPARATUS AND EQUIPMENT

4.2 EXPERIMENTAL MEASUREMENTS AND EVALUATION
4.2.1 Infrasound methods

4.2.2 Sonic and ultrasound methods

4.2.3 Hypersonic methods

4.3 PROCESSING THE RESULTS OF MEASUREMENTS AND INACCURACY
4.3.1 Inaccuracy caused by the design of equipment

4.3.2 Inaccuracies of the measurement method

4.3.3 Errors in processing the measurement results

5 STRUCTURAL INSTABILITY OF ALLOYS
5.1 DIFFUSION MOBILITY OF ATOMS
5.1.1 Interstitial solid solutions

5.1.2 Substitutional and solid solutions

5.2 RELAXATION OF DISLOCATIONS
5.2.1 Low-temperature peaks

5.2.2 Snoek and Köster relaxation

5.2.3 Phenomena associated with martensitic transformation in steel

5.2.4 Migration of solute atoms in the region with dislocations

5.3 RELAXATION AT GRAIN BOUNDARIES
5.3.1 Pure metals

5.3.2 Solid solutions

5.3.3 Relaxation models

5.4 ANALYTICAL PROCESSING OF THE RESULTS OF MEASUREMENTS
5.4.1 Solubility boundaries

5.4.2 Activation energy and diffusion coefficient

5.4.3 Breakdown of the solid solution

5.4.4 Intercrystalline adsorption

5.4.5 Transition of the material from ductile to brittle state

5.4.6 Relaxation movement of microcracks

6 CYCLIC MICROPLASTICITY
6.1 CRITICAL STRAIN AMPLITUDES AND INTENSITY OF CHANGES OF CHARACTERISTICS
6.1.1 Physical nature of the critical strain amplitude

6.1.2 Methods of evaluating critical amplitudes

6.2 CYCLIC MICROPLASTIC RESPONSE OF MATERIALS
6.2.1 Dislocation density and the activation volume of microplasticity

6.2 CYCLIC MICROPLASTIC RESPONSE OF MATERIALS (tiếp tục)
6.2.2 Condensation temperature of the atmospheres of solute elements

6.2.3 Deformation history

6.2.4 Cyclic strain curve

6.2.5 Temperature and cyclic microplasticity

6.2.6 Magnetic field and microplasticity parameters

6.2.7 Saturation of cyclic microplasticity

6.3 FATIGUE DAMAGE CUMULATION
6.3.1 Hypothesis on relationship of 
6.3.2 Deformation and energy criterion of fatigue life

6.3.3 Effect of loading frequency on fatigue limit

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Tags: Anton Puskar, Internal Friction