Posted in Metal Working Principles & Procedures

Properties of Materials

The physical properties of a metal or a plastic determine its behavior under stress, heat, and exposure to chemically active substances. In practical application, behavior of a material under these conditions determines its mechanical properties, indentation, and rusting. The mechanical properties of a material. therefore, are important considerations in selecting material for a specific job. The following information concerns metals. Plastics are discussed later in this chapter. Stress is the amount of internal force with which a material resists a change in shape. Strain is the deformation or change in shape that is caused by an applied load. Strength is…

Posted in Mechanical Engineering

Classification of Engineering Materials and Its Use in Workshop Technology

Material science provides the necessary information and knowledge regarding the nature and behavior of all types of engineering materials. The engineering usefulness of materials is decided based on this information. Material is something that consists of matter. Materials comprise a wide range of metals and non-metals which must be operated upon to form the end product. Whether this end product is a bridge, a computer, a space vehicle or an automobile, a technician must have an intimate knowledge of the properties and behavioral characteristics of the materials he intends to use. The word ‘materials’ however, does not refer to all…