Credit Structure: (2-2)3

Catalog Description:
Engineering requirements of materials; the structure of matter; atomic arrangements, structural imperfections, atom movements. Mechanical properties. Concepts of force, stress, deformation and strain; elasticity; elastic and plastic behavior; viscosity; rheological models. Creep, relaxion, brittleness, ductility, hardness, fatigue, toughness, resilience, and damping characteristics of materials.

Course Objectives:
All engineers are concerned with the structural safety, serviceability and the economics of the constructions with which they are involved. The successful approach to the problem can only be established through a sound knowledge of computational methods of engineering and a thorough understanding of the properties and behavior of engineering materials. Without a proper knowledge of materials neither the structural safety and serviceability nor the economics can be achieved in engineering projects. The purpose of this course is to emphasize the basic principles necessary for an understanding of the fundamental nature and properties of engineering materials and to make clear the significance of these principles in engineering practice. The objective has been to present a unified treatment of a variety of materials, stressing the fundamentals which provide a common basis for explaining the behavior of the varied materials. The organization of the course material is such that, first, the elements of the atomic and electronic structure of matter is introduced and the structure types of solids are explained. Then the physicochemical aspects of the colloidal material used in industrial practice is covered. A sequence proceeds from atomic structures to coarser structures, from the simple to the more complex. Such a sequence from atoms to crystals, to phases, to microstructures and to macrostructures is followed because the grosser structures and properties depend on the finer structural characteristics. Considering the importance of the mechanical behavior of materials and the limitation of the course period, emphasis is given to the phenomena associated with the mechanical behavior of the materials and their structural characteristics. Elasticity, plasticity and flow phenomena are explained by reference to the main types of engineering materials and a discussion of the strength and other related properties of the materials follows. Finally the effect of radiation damage on the mechanical properties of materials is briefly discussed. The course is already taught to the civil engineering and environmental engineering students with the contents written in the "syllabus" section. It is believed that the same content, with some minor changes if necessary, will be useful to all the engineering students.

Prerequisites:
None

Textbook(s):
None

Reference(s):
Z.D. Jastrebski, "Nature and Properties of Engineering Materials", John Wiley and Sons, Inc., 1976.
L.H. Van Vlack, "Elements of Materials Science", Addison-Wesley Publishing Co. Inc., 1966.

Syllabus:
1. Engineering requirements of materials: Mechanical properties, thermal properties, electrical properties, chemical properties, optical properties
2. The structure of matter: Atomic structure, interatomic attraction, atomic coordination
3. Atomic arrangements: Molecular Structures, crystal structures, amorphous structures
4. Structural Imperfections and atom movements: Impure phases, crystal imperfections, atom movements
5. Elasticity: Stresses and strains; Hookes Law, stress-strain diagrams; true stress and strain.
6. Moduli of elasticity: Young Modulus of elasticity, modulus of rigidity, modulus of compressibility, Poisson's ratio, relation between various moduli of elasticity
7. Deviations from perfect elastic behavior, thermoelastic effect, plasticity
8. Viscosity, viscosity of suspensions, non-Newtonian materials
9. Viscoelasticty and rheological models
10. Creep and relaxation
11. Brittleness, ductility, hardness, fracture of materials
12. Fatigue and endurance, toughness
13. Resilience, damping characteristics of materials

Homeworks, Quizzes, Projects:
None

Computer Usage:
None

Laboratory Work:
None

Category Content:
Mathematics and Basic Sciences: None
Engineering Design: None
Engineering Sciences: 3 credits
Humanities & Social Sciences: None
Departmental: None

Instructors:
Turhan Erdogan