Ultrasonic Treatment of Light Alloy Melts: 2nd Edition (Paperback) book cover

Ultrasonic Treatment of Light Alloy Melts

2nd Edition

By Georgy I. Eskin, Dmitry G. Eskin

CRC Press

346 pages | 278 B/W Illus.

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Description

Spawned by growing interest in ultrasonic technology and new developments in ultrasonic melt processing, the Second Edition of Ultrasonic Treatment of Light Alloy Melts discusses use of ultrasonic melt treatment in direct-chill casting, shape casting, rapid solidification, zone refining, and more, exploring the effects of power ultrasound on melt degassing, filtration, and refinement in aluminum and magnesium alloys. The fully revised and restructured Second Edition:

  • Contains new, in-depth coverage of composite and nanocomposite materials
  • Provides a historical review of the last century of ultrasonic applications to metallurgy
  • Emphasizes the fundamentals, mechanisms, and applications of ultrasonic melt processing in different light-metal technologies
  • Features new chapters on ultrasonic grain refinement, refinement of primary solid phases, and semi-solid processing of billets with nondendritic structure
  • Includes significant updates reflecting results obtained over the past two decades on different scales, from laboratory to full-scale industrial implementations

Complete with many new figures and examples, Ultrasonic Treatment of Light Alloy Melts, Second Edition delivers a comprehensive treatise on ultrasonic melt processing and cavitation, presenting essential guidelines for practical use and further development of the technology.

Reviews

"This book, written by two acknowledged experts in the field, presents the reader with a most extensive overview of the subject of ultrasonic processing of light-metal melts, from the basic fundamentals to practical applications."

—Joseph C. Benedyk, Light Metal Age

"… an interesting and thorough review of an often-misunderstood field of art. … quite clear and easy to understand. … [The authors], as experts in this field, have not only covered the fundamentals and important aspects but also helped the reader appreciate the finer details with the data and examples presented. … The materials are well organized when approached from a cover-to-cover approach, yet also divided into chapters and sections which are succinct and stand alone for quick reference. … I found this book to be a thorough review of the fundamentals with the details needed to apply the concepts in many diverse fields and areas. … Georgy Eskin is the premier scientist and innovator in applied ultrasonic treatments in light metals. … This book is a must have in the library of any engineer or scientist who processes light metals today. While intended as a thorough review, I found the book to be a catalyzer of innovation."

—Bob Wagstaff, Novelis, Inc., Spokane, Washington, USA

Table of Contents

Preface

Authors

Historical Overview of Ultrasonic Applications to Metallurgy

References

Fundamentals of Ultrasonic Melt Processing

Dynamic Means of Melt Processing

Low-Frequency Vibrations and Ultrasound: Basic Equations

Propagation of Acoustic Waves in the Melt

Acoustic Cavitation in Liquid Metals

Cavitation Strength of Liquids

Cavity Dynamics

Cavitation Region in Liquids

Acoustic Flows

Experimental Studies of Cavitation in Liquid Metals

Sonoluminescence in Melts

Accelerated Mixing and Dissolution of Components in the Melt

References

Ultrasonic Degassing

Cavitation and Degassing Nuclei

Mechanism of Ultrasonic Degassing

Ultrasonic Degassing in a Stationary Volume

Ultrasonic Degassing in the Flow

References

Ultrasonic Filtration

Effect of Ultrasound on Surface Tension and Wetting

Sonocapillary Effect

Basics of Filtration

Mechanism of Ultrasonic Melt Filtration

Filtering through Multilayer Screen Filters: Usfirals

Process

References

Ultrasonic Grain Refinement

Mechanisms of Ultrasonic Grain Refinement

Activation of Substrates

Deagglomeration and Dispersion of Particles

Refinement of Nucleating Intermetallics

Dendrite Fragmentation

Nondendritic Solidification

Ultrasonic Melt Processing in the Mold

Ultrasonic Melt Processing in the Melt Flow

References

Refinement of Primary Particles

Formation of Primary Particles during Solidification

Effect of Ultrasound on Solidification of Intermetallic Compounds

Effect of Ultrasound on the Solidification of

Hypereutectic Al–Si Alloys

References

Ultrasonic Processing during Direct-Chill Casting of Light Alloys

Direct-Chill Casting of Aluminum Alloys

Ultrasonic Processing in the Sump of a Billet

Ultrasonic Melt Processing in the Launder

Direct-Chill Casting of Magnesium Alloys

Effect of Ultrasonic Degassing and Filtration on Structure and Properties of Wrought Products

Ultrasonic Degassing

Ultrasonic Filtration

Effect of Nondendritic Structure on Structure and Properties of Wrought Products

Aluminum Wrought Alloys

Magnesium Wrought Alloys

Effect of Nondendritic Grain Structure on Homogenization

References

Ultrasonic Melt Processing during Shape Casting of Light Alloys

Technological Approaches to Shape Casting with Ultrasonic Processing

Effects of Ultrasonic Processing on Solidification in Molds

Effect of Ultrasonic Processing on Structure and Properties of Shape Castings

References

Ultrasonic Processing of Composite and Immiscible Alloys

Ultrasound-Assisted Introduction of Nonmetallic Particles and Fibers to Liquid Metals

Mechanical Properties of Composite Materials Produced Using Ultrasonic Processing

Ultrasonic Processing of Immiscible Alloys and Metallic Emulsions

References

Rapid Ultrasonic Solidification of Aluminum Alloys

Basic Sonication Schemes for Rapid Solidification

Formation of Nondendritic Structure in Rapid Solidification

Mechanical Properties of Wrought Products from Nondendritic Granules

References

Zone Refining of Aluminum with Ultrasonic Melt Processing

Basics of Zone Refining

Ultrasonic Zone Refining of Aluminum

Mechanisms of Sonication Effects on Zone Refining

Structure and Characteristics of Deformed Acoustically Refined Aluminum

References

Semisolid Deformation of Billets with Nondendritic Structure

Introduction to Semisolid Deformation 291

Effect of Nondendritic Structure of Billets on Thixotropic Behavior of Aluminum Alloys

Rheological Parameters of Semisolid Alloys

Computer Simulation of Semisolid Forging

Semisolid Deformation of Casting Alloys with Nondendritic Grain Structure

Application of Ultrasonic Processing to Rheocasting

References

Ultrasonic Melt Processing: Practical Issues

Ultrasonic Equipment

Design of Waveguide and Sonotrode

Selection of Materials for Sonotrodes

Characterization of Ultrasonic Processing

References

About the Authors

Georgy I. Eskin, Dr. Sc, Ph.D, is a world-renowned specialist in the application of ultrasound in metals processing, specifically in degassing, filtration, and grain refinement during casting of aluminum and magnesium alloys. He holds over 100 patents in ultrasonic melt processing and has authored and co-authored more than 400 scientific papers and 10 monographs, reference books, and textbooks. A full member of the Russian Academy of Natural Sciences, he has worked in industry as a research scientist, in the All-Russia Institute of Light Alloys as a senior and principal scientist, and in the Moscow Institute of Steel and Alloys as a professor.

Dmitry G. Eskin, Ph.D, is a well-known specialist in light-metal processing. His main scientific contributions are to the processing of multicomponent alloys and to the formation of structure and defects during solidification of aluminum alloys. He is currently a professor in solidification research at Brunel University. He has authored and co-authored more than 180 scientific papers, 5 patents, and 5 monographs. Previously he worked in the Baikov Institute of Metallurgy (Russian Academy of Sciences) as a senior scientist and held various senior research positions with the Netherlands Institute for Metals Research, Materials innovation institute and Delft University of Technology.

About the Series

Advances in Metallic Alloys

Learn more…

Subject Categories

BISAC Subject Codes/Headings:
SCI013000
SCIENCE / Chemistry / General
SCI077000
SCIENCE / Solid State Physics
TEC021000
TECHNOLOGY & ENGINEERING / Material Science
TEC023000
TECHNOLOGY & ENGINEERING / Metallurgy