Solve Question 1,2,3,4,5 and 6

1- Mention the main types of crystal lattice imperfections. 2- Discuss in details the types of point defects that may occur in a metallic solid materials. What are the materials properties that can be affected by point defects? 3- What is meant by edge dislocation? 4- What is the effect of the presence of dislocation on the mechanical propertics of metallic materials? 5- Lattice grain boundaries can be used sometimes to enhance the materials strength, give reasons. 6- The addition of up to 30%Zn as an alloying element to copper causes, i) The melting point to ii) The strength to iii) The electrical resistivity to give reasons for each part. 1- Mention the main types of crystal lattice imperfections. 2- Discuss in details the types of point defects that may occur in a metallic solid materials. What are the materials properties that can be affected by point defects? 3- What is meant by edge dislocation? 4- What is the effect of the presence of dislocation on the mechanical propertics of metallic materials? 5- Lattice grain boundaries can be used sometimes to enhance the materials strength, give reasons. 6- The addition of up to 30%Zn as an alloying element to copper causes, i) The melting point to ii) The strength to iii) The electrical resistivity to give reasons for each part