Hardness testing is carried out in order to determine how strong or weak a certain solid is or may be. There are different types of hardness testing methods though they are all made for one purpose- to test the hardness of the object and to test how solid an object is. It really helps determine the measure of how solid an object really is. This is carried out in different ways- some of these require the application of force to see how they can stand a certain amount of force.
Scratch hardness is one of the many types of hardness testing that helps determine how an object would withstand friction, scratches or any other thing of the sort. Generally it is presumed that a metal that is harder than another one wouldn’t be affected by scratches from ‘softer’ solids whereas softer solids cannot do the same. Harder solids are frequently used to cut softer ones. In fact in some cases, diamonds are put into the tips of the drilling machine to be able to drill through some materials such as walls, cement and such like. You will also notice that when drill machines are used, the drill itself doesn’t get affected- you won’t find scratches on the drill but it would successfully drill a hole though, say, a wall or such like. This is known as hardness testing.
Another of the many types of hardness testing which is known as indentation techniques and the use of compression upon certain material is tested. Usually the object is a hard and pointed object and the effects of that are seen on the object that it is applied upon. If it does compress and is affected by the object, it is not considered to be solid and when it is not, it is said to be hard and solid.
Then, the third of the various types of hardness testing is rebound hardness where an object is thrown on a subject matter and the impact of that object is seen upon the matter that it is thrown on. For example, a diamond-tipped hammer may be thrown on to a surface to see the impact of the hammer on the object. It is used to test the elasticity of an object and this elasticity is measured by a scleroscope. If it bounces, it is not considered to be solid and if it does not, it is considered to be solid.
These are some of the many types of hardness testing that are carried out in various fields today. These techniques are usually used by businesses and companies that are involved in the engineering of certain objects and such like. Even the cars that we use or the furniture that is around us is made after going through the various types of hardness testing. The purpose of the hardness testing is to see how resistant these are to certain forces, applied forces and frictions. There are many other types of hardness testing in the field as well.