Korozně elektrochemické a mechanické vlastnosti vybraných slitin Ni-Ti-Me

Abstract

The object of this bachelor’s work is to aims to introduce a relatively new metal called nitinol, and close deals both with the mechanical, and electrochemical properties. It also describes the different types of shape memory phenomenon and discribes the way, how are they established. The temperature at which are the memory effects established are directly dependent on the composition of the alloy, respectively the nickel content, which most affects the temperature. Also been approached issues related to individual nitinol alloying elements such as iron, copper, hafnium and tungsten. There are the diagrams of the ternary systems for every alloy included. They are also subscriped the greatest advantages and disadvantages of alloys. Mechanical properties of alloys are closely related to their composition, so is the next part focuses on the production of the desired alloy composition, describes the different ways of production and their "precision ". The second part focuses mainly electrochemical properties of nitinol, its resistance in various corrosive media and the most common types of corrosion, which may be these materials affected by. The practical part is focused on the resistance of materials against pitting corrosion. There will also be discussed how various alloying elements affect the ability of a material to resist pitting corrosion.