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← TechnologyWhich consequence results when casting molten steel incorporates excess atmospheric gas?
A)Increased material tensile toughness
B)Elevated solidification crystallisation temperature
C)Formation of internal stress porosity✓
D)Reduced machining work tool wear
💡 Explanation
Gas porosities occur because the lower solubility of gases in solidified steel results in bubble nucleation. This microstructural phenomenon creates internal stress cracks, therefore, compromising its structural integrity, rather than other effects related to pure alloy composition.
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