NANO INDENTATION TEST OF ULTRAFINE GRAINED ALUMINIUM - Business Economics

Internal Code: MAS515

Business Economics:

The world without materials is nothing! Determination of properties of the materials is a necessity to survive in this world! Nanoindentation test is a frequently used tool for identifying events like activation of source dislocations and shear instability initiation(Schuh 2006).It was in 1992 the instrumented indentation technique was started using to investigate the mechanical characteristics of materials(W.C. Oliver 2003). Advancements which took place in actuators and sensors enables instrumented indentations to be processed frequently on materials in micro levels(Schuh 2006). Actuators, sensors and indenter tip are the main parts of nanoindentation tests. Movement of indenter tip during loading and unloading will help to document the load and displacement and it is depicted on the load-displacement curve. Each material has their own load-displacement curve which reveals its own mechanical characteristic(Schuh 2006). The mechanical properties of elastic modulus and hardness are mainly measured in nanoindentation tests. There is no need to image hardness impressions which make the nanoindentation test more convenient than other techniques to determine characteristics of the materials(W.C. Oliver 2003). Recovery material is the guideline which connects elastic modulus, hardness and energy blown out during indentation process(Bao, Wang et al. 2004). Evaluation of deformation induced grain growth, strain sensitivity and contribution of matrix strength can be done by nanoindentation test. “Evaluation of out comings from the test is tough comparatively. The main difficulty is to find appropriate tips based on the usages like the tip for the test to measure elastic modulus. Apart from that, characteristics of soft materials are highly tip dependent which makes the nanoindentation test on soft materials challenging. Surface detection and adhesions also make the test tougher”