ABSTRACT
This chapter focuses on the interrelationships of the various mechanical properties. Most mechanical properties are structure sensitive, that is, they are affected by changes in either the lattice structure or the microstructure, but the modulus of elasticity is one property that is structure insensitive. Even though the Brinell hardness test is a technological one, it can be used with considerable success in engineering research on the mechanical properties of materials, and it is a much better test for this purpose than the Rockwell test. The difference between the hardness scales is simply the area that is divided into the applied load the projected area being used for the Meyer hardness and the spherical surface area for the Brinell hardness. The tensile strength is a commonly used mechanical property in engineering calculations even though it is the yield strength that is used to measure when plastic deformation begins for given material.
