ANALYSIS OF THE INFLUENCE OF CHEMICAL COMPOSITION AND TEMPERATURE ON MECHANICAL PROPERTIES OF SUPERALLOYS NIMONIC 80A

摘要

Superalloys Nimonic 80A is a wrought nickel base alloy (min. 65 % Ni) and chromium (20 %), with minor additions of carbon, cobalt and iron, as well as major alloying elements of aluminum (1 to 1,8 %) and titanium (1,8 to 2,7 %). Chemical composition of the alloy Nimonic 80A has a dominant influence on its mechanical and technological properties. Increasing of the temperature also has a large influence on the mechanical properties of superalloy Nimonic 80AInvestigations which were carried out have included chemical testing and testing of mechanical properties of superalloy Nimonic 80A at room and higher temperatures. Regression analysis was done on the base of chemical analyses and results of mechanical properties. The results of regression analysis are equations- by which on the basis of known chemical composition, ie content of main alloying elements AI, Ti and Co, the mechanical properties of materials at room and higher temperatures can be predicted.