Mechanical Properties of Nanocrystalline Materials

This book concentrates on both understanding and development of nanocrystalline materials. The original relation that connects grain size and strength, known as the Hall-Petch relation, is studied in the nanometer grain size region.

Author: James C. M. Li

Publisher: CRC Press

ISBN: 9789814241977

Category: Science

Page: 344

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This book concentrates on both understanding and development of nanocrystalline materials. The original relation that connects grain size and strength, known as the Hall-Petch relation, is studied in the nanometer grain size region. The breakdown of such a relation is a challenge. Why and how to overcome it? Is the dislocation mechanism still operating when the grain size is very small, approaching the amorphous limit? How do we go from the microstructure information to the continuum description of the mechanical properties?
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Nanocrystalline Materials

7.1 MECHANICAL PROPERTIES Because of the application of bulk nanocrystalline materials in practice, it has been necessary to investigate in detail their hardness, strength, elasticity, plasticity and other mechanical properties.

Author: Aleksandr Ivanovich Gusev

Publisher: Cambridge Int Science Publishing

ISBN: 9781898326267

Category: Science

Page: 351

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In the monograph, the first of this type in the world, the authors discuss systematically the current state of investigations into nanocrystalline materials. The experimental results on the effect of the nanocrystalline state on the microstructure and the mechanical, thermophysical, optical, and magnetic properties of metals, alloys and solid-phase compounds are generalised. Special attention is given to the main methods of production of isolated nanoparticles, ultrafine powders and dense nanocrystalline materials. The dimensional effects in isolated nanoparticles and high-density nanocrystalline materials are discussed in detail, and the important role of the interface in the formation of the structure and properties of dense nanocrystalline materials is shown. The modelling considerations, explaining special features of the structure and anomalous properties of substances in the nanocrystalline condition, are analysed.
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Structural Nanocrystalline Materials

The mechanical properties of nanocrystalline materials are strongly influenced by their definitive(generic)structuralpeculiaritieswhicharenanoscopicsizeofgrainsandextremely high volume fraction of the interfacial phase.

Author: Carl Koch

Publisher: Cambridge University Press

ISBN: 9781139464017

Category: Technology & Engineering

Page:

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Nanocrystalline materials exhibit exceptional mechanical properties, representing an exciting new class of structural materials for technological applications. The advancement of this important field depends on the development of new fabrication methods, and an appreciation of the underlying nano-scale and interface effects. This authored book addresses these essential issues, presenting for the first time a fundamental, coherent and current account at the theoretical and practical level of nanocrystalline and nanocomposite bulk materials and coatings. The subject is approached systematically, covering processing methods, key structural and mechanical properties, and a wealth of applications. This is a valuable resource for graduate students studying nanomaterials science and nanotechnologies, as well as researchers and practitioners in materials science and engineering.
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Mechanical Properties of Complex Intermetallics

Introduction Mechanical properties of nanocrystalline materials have arouse strong interest over the past one or two decades because of the expectation that the grain size refinement of the materials into nanometer size range will ...

Author: Esther Belin-Ferr‚

Publisher: World Scientific

ISBN: 9789814322164

Category: Science

Page: 457

View: 148

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This book will be the last one in a series of 4 books issued yearly as a deliverable of the research school established within the European Network of Excellence CMA (for Complex Metallic Alloys). It is written by reputed experts in the fields of metal physics, surface physics and chemistry, metallurgy and process engineering, combining expertise found inside as well as outside the network. The CMA network focuses on the huge group of largely unknown multinary alloys and compounds formed with crystal structures based on giant unit cells containing clusters, with many tens up to more than thousand atoms per unit cell. In these phases, for many phenomena, the physical length scales are substantially smaller than the unit-cell dimension. Hence, these materials offer unique combinations of properties, which are mutually excluded in conventional materials: metallic electric conductivity combined with low thermal conductivity, combination of good light absorption with high-temperature stability, combination of high metallic hardness with reduced wetting by liquids, electrical and thermal resistance tuneable by composition variation, excellent resistance to corrosion, reduced cold-welding and adhesion, enhanced hydrogen storage capacity and light absorption, etc. The series of books will concentrate on: development of fundamental knowledge with the aim of understanding materials phenomena, technologies associated with the production, transformation and processing of knowledge-based multifunctional materials, surface engineering, support for new materials development and new knowledge-based higher performance materials for macro-scale applications.
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Mechanical Properties and Deformation Behavior of Materials Having Ultra Fine Microstructures

5.2 TRIPLE JUNCTIONS AND SOME PROPERTIES OF NANOCRYSTALLINE MATERIALS A recent study [145] was conducted to determine the transport behaviour of hydrogen in electrodeposited nanocrystalline Nifoil (average grain size of 17 nm) at 293 K.

Author: M. Nastasi

Publisher: Springer Science & Business Media

ISBN: 9789401117654

Category: Technology & Engineering

Page: 624

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In an attempt to meet the demand for new ultra-high strength materials, the processing of novel material configurations with unique microstructure is being explored in systems which are further and further from equilibrium. One such class of emerging materials is the so-called nanophased or nanostructured materials. This class of materials includes metals and alloys, ceramics, and polymers characterized by controlled ultra-fine microstructural features in the form oflayered, fibrous, or phase and grain distribution. While it is clear that these materials are in an early stage of development, there is now a sufficient body of literature to fuel discussion of how the mechanical properties and deformation behavior can be controlled through control of the microstructure. This NATO-Advanced Study Institute was convened in order to assess our current state of knowledge in the field of mechanical properties and deformation behavior in materials with ultra fine microstructure, to identify opportunities and needs for further research, and to identify the potential for technological applications. The Institute was the first international scientific meeting devoted to a discussion on the mechanical properties and deformation behavior of materials having grain sizes down to a few nanometers. Included in these discussions were the topics of superplasticity, tribology, and the supermodulus effect. Lectures were also presented which covered a variety of other themes including synthesis, characterization, thermodynamic stability, and general physical properties.
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Synthesis and Properties of Advanced Materials

SYNTHESIS, CHARACTERIZATION AND MECHANICAL PROPERTIES OF NANOCRYSTALLINE METALS P. G. Sanders, N. N. Rittner and J. R. Weertman Northwestern University, Evanston, IL 60208-3108 An extended study has been carried out of the synthesis, ...

Author: C.J. McHargue

Publisher: Springer Science & Business Media

ISBN: 9781461563396

Category: Technology & Engineering

Page: 289

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Synthesis and Properties of Advanced Materials provides an overview of some of the most exciting developments in advanced materials. The book contains review papers based on tutorial lectures given at The First Pan American Advanced Study Institute held in Merida, Mexico, 1995. Each paper serves as a comprehensive introduction and review to the topic covered. Topics included: diamond and related materials, nanocrystalline metals and ceramics, Co-based alloys for biomedical applications, high-temperature superconductivity materials, composite materials, cement-based materials, ion-implanted ceramics and structural ceramics. Each chapter emphasizes the relationships among processing parameters, micro-structure and properties. Synthesis and Properties of Advanced Materials provides an excellent review of the state of the art in advanced materials for the working engineer or researcher. Students will also find this text an accessible introduction to the field.
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Processing and Properties of Nanocrystalline Materials

Introduction In order to truly understand the mechanical behavior of metallic nanocrystals , it is necessary to study ... defect free nanocrystalline copper compacts and measure the intrinsic mechanical properties of the material .

Author: C. Suryanarayana

Publisher: Tms

ISBN: STANFORD:36105018374541

Category: Nanostructured materials

Page: 496

View: 697

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This volume records the proceedings of the International Symposium on Processing and Properties of Nanocrystalline Materials held at Materials Week '95 in Cleveland, Ohio, October 29-November 2, 1995. It contains a stale-of-the-art review of various aspects of nanocrystalline materials, including fundamentals, synthesis/processing, characterization, consolidation, mechanical properties, magnetic properties, and applications.
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