MAE T 202
Materials Testing (3) A review of industrial methods and testing standards used for mechanical property testing and evaluation of engineering materials.
MAE T 202 Materials Testing (3)
This course provides an overview of testing of engineering materials to two year associate degree students. The objective is for students to gain familiarity with common methods of testing for the properties of materials. A broad knowledge of materials testing is needed in dealing with the specification and acceptance of materials fabricated using powdered metal (P/M) technology.
This course begins with a short introduction on the role of testing in controlling material properties. The first major topic is metrology. This gives the students a review of common gauges used for dimensional measurement. The next topic covers statistics and data analysis. Here it is important for the student to gain an understanding of how to record and present numerical data. The concepts of mean, standard deviation, coefficient of variation, grouped data, frequency polygon, ogive, cumulative percent, and histogram are reviewed. Following statistics, the basic principles of mechanical behavior are presented. The concepts of stress, strain, elasticity, strength, and ductility are introduced. Tensile testing is covered in considerable depth and includes details of the testing apparatus, test specimens, test procedures, and data interpretation. Other common mechanical tests used in engineering work are presented. This includes compression testing, hardness testing, shear testing, bend testing, and impact testing. The student is introduced to standard procedures used in materials testing as described by the American Society for Testing and Materials (ASTM) and by other literature published by the Metal Powder industries Federation (MPIF). Fatigue testing is introduced to the student using stress vs. cycles to failure curves. This also includes various types of fatigue testing apparatus, test specimens, and test procedures. Nondestructive testing (NDT) techniques are discussed. The emphasis here is on how surface and subsurface structural flaws (i.e., cracks) may be detected in components without physically destroying them.
A major shift in topics occurs when scanning electron microscopy (SEM) is presented. The SEM is an important topic because of its use in fractography and failure analysis. Elements of fracture mechanics are covered to give insight into why and how fracture may occur in components at stress levels well below the ultimate tensile strength due to the presence of a critical sized flaw. The final topic in the course is failure analysis. Case histories of actual part failures are discussed, and suggested guidelines in carrying out failure analysis are presented.
Note : Class size, frequency of offering, and evaluation methods will vary by location and instructor. For these details check the specific course syllabus.