Metals were perhaps the first elements to have been utilized by humans. Metals were employed to make both ornaments and sharp weapons. Today the metallic materials (metals and their mixtures) play an indispensable role in engineering, technology, and industry. All tools and machines ranging from a sewing needle to automobiles and aircraft are made of various metallic materials. These materials thus constitute one of the most important classes of the engineering materials.
KeywordsBinary Alloy Packing Fraction Sewing Needle Elementary Textbook Spherical Fermi Surface
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