Causes for formation of porosity in welds


Question 1:

Make a distinction between porosity and blow holes?

Question 2:

Illustrate the causes for formation of porosity in welds?

Question 3:

What are the situations required for the phase change in structures due to welding?

Question 4:

Illustrate the mechanism for the formation of heat affect zone in welds?

Question 5:

What are the constituents employed to coat on bare electrodes? Illustrate each of the ingredients?

Question 6:

Make a distinction between AC welding and DC welding?

Question 7:

Austenitic Stainless Steels are successfully welded through spot welding. Comment on this line.

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Mechanical Engineering: Causes for formation of porosity in welds
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