Engineering Materials And Their Applications
This edition of the classic text/reference book has been updated and revised to provide balanced coverage of metals, ceramics, polymers and composites. The first five chapters assess the different structures of metals, ceramics and polymers and how stress and temperature affect them. Demonstrates how to optimize a material's structure by using equilibrium data (phase diagrams) and nonequilibrium conditions, especially precipitation hardening. Discusses the structures, characteristics and applications of the important materials in each field. Considers topics common to all materials—corrosion and oxidation, failure analysis, processing of electrical and magnetic materials, materials selection and specification. Contains special chapters on advanced and large volume engineering materials plus abundant examples and problems.
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ANSWER A thin section in a casting cools rapidly enough to provide a solution
treatment; i.e. supersaturated a is obtained. Next, at room temperature natural
aging takes place and a coherent precipitate results in an age-hardened alloy.
Since the discovery of ductile iron many malleable iron producers have changed
to the new material, although malleable iron is still used for many thin-section
castings. It is interesting to follow the structural changes in the heat treatment
Case A. Automobile crankshaft: maximum section 2 in. (5.08 cm), BHN 220,
endurance limit in fatigue 20,000 psi (138MN/m2). This is discussed later and
can be taken as 0.25 x tensile strength. Case B. Engine head: sections } to 1 in.
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A General View of the Problems
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