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Welding: Principles and Applicatio...

8th Edition
Larry Jeffus
ISBN: 9781305494695

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BuyFindarrow_forward

Welding: Principles and Applicatio...

8th Edition
Larry Jeffus
ISBN: 9781305494695
Textbook Problem
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How is piping porosity formed?

To determine

The name of process causing porosity in welding.

Explanation

Porosity exists in different forms like- distributed, wormhole, pores generated by cracks on the surface. The gases dissolved is hydrogen, nitrogen and oxygen. Presence of pores causes shielding problems.

Piping porosity is caused by presence of contaminants present in the area of root. This is formed due to formation of bubbles in the molten metal. It arises when some gas freeze and comes out in form of bubbles which develops after solidification of molten metal. Solidification of molten weld is the stage when pores arises. Sizes of pores depends on the amount of gas released from the molten metal pool...

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