The responsibilityįor a particular microstructure and a resulting failure is a When a material does fail, the reason for its failure may be foundīy examining and "reading" its microstructure. Such as "interlamella spacing not to exceed 0.1 micron."įinally, materials users have become increasingly aware that Terms such as "medium pearlite" have been replaced by requirements Of particles, and grain intercept distances.
#Mean intercept analysis stereology free
To include such things as volume fraction of phases, mean free path Grain size or graphite type, today's specifications are beginning Included microstructural requirements for details such as ASTM Whereas specifica tions written several years ago may have This is clearly evident from evenĪ cursory examination of recently written specifications for materials where rather precise microstructural parameters are stipulated. Nuclear energy systems, requires close control on the microstructural conditions of materials. Required of materials used today, for example, in aerospace and Furthermore, the extremely high reliability Heat treatment, and mechanical working that will result in the desired microstructure. The newer materials, such as dispersion-strengthened alloys, haveīeen designed almost entirely by first determining the microstructure desired and then finding the right combination of composition, Microstructural condition of their materials. Stress, temperature, and environment have relied heavily on the No part of this publication may be reproduced in any form without writtenĭuring recent years, people involved in developing new metalsĪnd materials for use in some of the rather extreme conditions of United Kingdom edition published by Plenum Press, LondonĪ Division of Plenum Publishing Company, Ltd.ĭavis House (4th Floor), 8 Scrubs Lane, Harlesden, London, NWlO 6SE, England Softcover reprint of the hardcover 1st edition 1973Ī Division of Plenum Publishing CorporationĢ27 West 17th Street, New York, N.Y. Library of Congress Catalog Card Number 73-81089 The symposium was sponsored by the International Metallographic Society Proceedings of a symposium held September 17-18, 1972, in Chicago, Illinois. The responsibility for a particular microstructure and a resulting failure is a matter of growing importance in current product liability consider ations. " Finally, materials users have become increasingly aware that when a material does fail, the reason for its failure may be found by examining and "reading" its microstructure. Rather arbitrary terms such as "medium pearlite" have been replaced by requirements such as "interlamella spacing not to exceed 0. Whereas specifications written several years ago may have included microstructural requirements for details such as ASTM grain size or graphite type, today's specifications are beginning to include such things as volume fraction of phases, mean free path of particles, and grain intercept distances. This is clearly evident from even a cursory examination of recently written specifications for mate rials where rather precise microstructural parameters are stipu lated. Furthermore, the extremely high reliability required of materials used today, for example, in aerospace and nuclear energy systems, requires close control on the microstruc tural conditions of materials. In fact, many of the newer materials, such as dispersion-strengthened alloys, have been designed almost entirely by first determining the microstruc ture desired and then finding the right combination of composition, heat treatment, and mechanical working that will result in the de sired microstructure. During recent years, people involved in developing new metals and materials for use in some of the rather extreme conditions of stress, temperature, and environment have relied heavily on the microstructural condition of their materials.
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