![]() This is the traditional "chalk and talk" approach that has been used since few decades ago (Mills &Treagust, 2003).According to the previous research studies,the traditional learning (passive classroom teaching) may lead to passive learning, ignore individual differences and needs of the learners, and do not emphasize more on critical thinking, or other higher order thinking skills (Hannum & Briggs, 1982). Medieval engineers free download no survey series#The teaching tools involved are the used of power-point slides presentation for the theory of mechanics dynamics, and the used of white board to further illustrate on the application of formula in a series of proper working steps to reach the solution of a problem. The described methodology provides an academic reference for the didactic evaluation of the main techniques associated with the treatment of materials for physics and mechanical engineering training. The results allow identifying the correlation between microstructures and mechanical properties, providing an engineering educational approach for metallographic analysis and heat treatment schemes focused on the grain size interpretation, resilience and stress-strain curves. Both 41 and 67% in elongation and area reduction percentages, respectively, in the normalized samples were observed. A grain diameter of 3 to 4 µm was observed in both annealed and normalized sample, so it is assumed that the cold rolled or reference sample had a normalized condition. For the hardness analysis, the round indenter of 1/16 in of Tungsten Carbide with a preload of 100 kg was used. Images were obtained with a Nikon NIS Elements computer programming, in order to observe the microstructure and identify the phases involved in each of the thermal treatments. Different thermal treatments were applied on AISI-SAE 1018 steel specimens by raising the temperature until it reached the austenization state. The uses of metallographic techniques and hardness/tensile tests for analyzing experimental variations due to structural changes are included. The study is centered in an educational research emphasis about microstructure evaluation and heat treatments in steels samples machined according to ASTM E8 specifications. An academic methodology based for experimental evaluation of materials treatment is presented. ![]()
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