Gases dissolved in molten metals are liberated when cooled giving rise to________________?
Correct answer: B. Gas inclusion porosity
- A. Suckback porosity
- B. Gas inclusion porosity
- C. Localized shrinkage porosity
- D. Microporosity
Explanation
Gas dissolved in molten metal becomes less soluble as the metal cools and is released as bubbles, producing gas-inclusion or gas porosity. Suck-back and localized shrinkage porosity result mainly from inadequate feeding during solidification.
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