Question

11- In general, how does adding carbon affect iron and carbon steel properties? (name 3 properties and how the property changes from the additional carbon)

12- Describe galvanic corrosion.

13- What is a heat resistant alloy?

14- Describe the difference between deformation and strain?

Answer 1

The role of carbon as an interstitial impeding dislocation movement in thesteel matrix factors into strength, butcarbon's most fundamental and powerful effect with the iron atoms is that it can produce Martensite, a hard, brittle phase that forms when carbonis 'trapped' in the iron crystal lattice.

12-Galvanic corrosion refers to corrosion damage that occurs when two different metals are in electrical contact in an electrolyte, where the more noble metal is protected and the more active metal tends to corrode. Galvanic corrosion may also be known as bimetallic corrosion and dissimilar metal corrosion.

13-Heat-resistant Alloys. alloys that have high creep resistance and strength at high temperatures. They are used as the construction material for parts of internal-combustion engines, steam and gas turbines, jet engines, and atomic-power installations.

14-

What is the difference between Strain and Deformation?

• Strain is force, whereas deformation is the change of shape.

• Strain is a measureable quantity whereas deformation is not measureable.

• The strain on an object strictly depends on the external force applied. The deformation of an object depends on the external force, the material and whether the material is in an elastic deformation or a plastic deformation.