This material may consist of step-by-step explanations on how to solve a problem or examples of proper writing, including the use of citations, references, bibliographies, and formatting. This material is made available for the sole purpose of studying and learning - misuse is strictly forbidden.INTRODUCTION
The Metals Handbook defines hardness as "Resistance of metal to permanent or plastic deformation".
Unlike other measurements that directly relate to a material's physical properties (e.g., weight is directly related to mass), hardness is a comparative measurement. It is important to recognize that hardness is an empirical test and therefore hardness is not a material property. This is because there are several different hardness measurements depending on the manner in which the test is conducted....