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fpref - 1496T_fm_i-xxvi 02:56 Page ix Preface In this...

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ix Preface I n this Seventh Edition I have retained the objectives and approaches for teaching materials science and engineering that were presented in previous editions. The first, and primary, objective is to present the basic fundamentals on a level appropriate for university/college students who have completed their freshmen calculus,chemistry,and physics courses. In order to achieve this goal, I have endeavored to use terminology that is familiar to the student who is encountering the discipline of materials science and engineering for the first time, and also to define and explain all unfamiliar terms. The second objective is to present the subject matter in a logical order, from the simple to the more complex. Each chapter builds on the content of previous ones. The third objective, or philosophy, that I strive to maintain throughout the text is that if a topic or concept is worth treating, then it is worth treating in sufficient detail and to the extent that students have the opportunity to fully understand it without having to consult other sources; also, in most cases, some practical relevance is provided. Discussions are intended to be clear and concise and to begin at appropriate levels of understanding. The fourth objective is to include features in the book that will expedite the learning process. These learning aids include: Numerous illustrations, now presented in full color, and photographs to help visualize what is being presented; Learning objectives; “Why Study . . .” and “Materials of Importance” items that provide rele- vance to topic discussions; Key terms and descriptions of key equations highlighted in the margins for quick reference; End-of-chapter questions and problems; Answers to selected problems; A glossary, list of symbols, and references to facilitate understanding the subject matter. The fifth objective is to enhance the teaching and learning process by using the newer technologies that are available to most instructors and students of engineering today. F EATURES T HAT A RE N EW TO T HIS E DITION New/Revised Content Several important changes have been made with this Seventh Edition. One of the most significant is the incorporation of a number of new sections, as well 1496T_fm_i-xxvi 1/6/06 02:56 Page ix
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as revisions/amplifications of other sections. New sections/discussions are as follows: One-component (or unary) phase diagrams (Section 9.6) Compacted graphite iron (in Section 11.2, “Ferrous Alloys”) Lost foam casting (in Section 11.5, “Casting”) Temperature dependence of Frenkel and Schottky defects (in Section 12.5, “Imperfections in Ceramics”) Fractography of ceramics (in Section 12.8, “Brittle Fracture of Ceramics”) Crystallization of glass-ceramics, in terms of isothermal transformation and continuous cooling transformation diagrams (in Section 13.3, “Glass-Ceramics”) Permeability in polymers (in Section 14.14, “Diffusion in Polymeric Materials”) Magnetic anisotropy (Section 20.8) A new case study on chemical protective clothing (Sections 22.13 and
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