Write a 6 pages paper on tensile testing of ferrous and non-ferrous metals. In measuring the mechanical properties, two methods were used. These were nanoindentation and compression tests. A compression test is a fast and simple method of identifying the elastic limit and material strength. The benefit of using the nanoindentation is the chance of testing the mechanical characteristics for the different file profile regions and the bulk material. Compression tests were carried out at room temperature using an RMC 100 machine that functioned in inverse compression and different supporting loads up to 20kg at room temperature. The pistons are brought apart from two WC-CO plates ensuring piston protection from possible indents formation. The force applied is measured using a load cell connected to the movable piston. The resultant displacement was measured using two extensometers. Hardness is known to be the material resistance to plastic deformation mostly through indentation. This term may equally refer to cutting, abrasion, or scratching resistance. Hardness could be expressed quantitatively especially within a procedure of measurement. A number of hardness test methods can be applied to various indent geometries. A significant advancement in the measurement of hardness came out with the establishment of those instruments that measure displacement and force as an established indentation. All the data collected was recorded in the tables displayed in the results section. The mechanical properties can also be tested at a scale of submission.
In this case, the data for the load-displacement is analyzed according to the Pharr and Oliver proposed method. In all the indentation test, the material is penetrated by the indenter with given rates up to when the peak load defined Pmax or the depth penetration max is realized. For a short time, the peak load is maintained constant and the indent withdrawn. In this respect, a law was proposed concerning the curve that is unloaded (Blatt, 2004). According to this law, P =, an (h-hf)m where m and a are parameters that are phenomenological and hf represents the residual depth of impression after loading brought about by a minimal square procedure of fitting (Benkirat, 2007).