Option 12
1. How does the degree of purity of the metal or the presence of impurities in the alloy affect the flow
Crystallization process?
2. How and why does the dislocation density change during plastic deformation? Influence
Dislocations on the properties of the metal.
3. Draw a diagram of the iron-iron carbide state, indicate the structural
Components in all areas of the diagram, describe the transformations and construct a curve
Cooling (using the phase rule) for an alloy containing 4.5% C. What is the structure of this
Alloy at room temperature and how such an alloy is called?
4. Draw a diagram of the isothermal transformation of austenite of eutectoid steel and
Put on it a curve of the isothermal annealing regime. Describe the transformations and the
After such processing the structure, its properties.
5. Using the iron-cementite state diagram, determine the temperature of the total and
Incomplete quenching for steel 40. Give a description of the structure and properties of steel after each type
Heat treatment.
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