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เนื้อหาย่อ : The Fifth Edition of The Science and Engineering of Materials has two primary objec- tives. The first continues the theme of earlier editions by providing a clear presentation of the relationship between the structure of a material, its processing, and its properties. The principal goals of a materials scientist and engineer are to make existing materials better and to invent or discover phenomena that will enable development of new mat- erials, devices, and applications. All engineers, in all specialties, can benefit from a thorough knowledge of materials science. Materials science underlies many technologi- cal advances related to energy, information, and the environment. Having a basic under- standing of materials and their applications not only makes for a better engineer, but also aids in the design process for any device or application under consideration. It is important for today's engineers to understand the constraints of materials behavior and their abilities in order to select the best material for a given application. We believe that engineers who have a thorough understanding of the basic concepts of atomic and molecular structure, and who know which material properties lend themselves to the most efficient and cost-effective processes, will make design decisions to develop the best products and applications. The second objective of this text is to motivate engineering students to want to study and understand materials science using exciting and current developments in the field. Considerable effort has been made to bring interesting and modern applications into dis- cussions about basic theoretical presentations in order to tie the theory to actual applica- tions. The diversity of applications and the unique uses of materials are presented in the Example sections of each chapter in order to help illustrate why a good engineer needs to thoroughly understand and know how to apply the principles of materials science and engineering. Considerable advances have occurred in the areas of nano-technology, information technology, energy technology, and biomedical engineering. In this new edition you will see many examples that directly relate to these areas of technology. Audience and Prerequisites This text is intended for engineering students who have completed introductory courses in general chemistry, physics, engineering and calculus. Most students will take this course when they are sophomores or juniors and the presentation has been carefully geared towards this audience. To facilitate understanding, a brief description of key ideas from earlier prerequisite courses is provided to help students refresh their memor- ies. The text does not presume that students have had any of the prerequisite engineering courses in statics, dynamics, or mechanics of materials. We feel that while reading and using this book, students will find materials science and engineering very interesting, and they will see the relevance of what they