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← TechnologyWhich consequence results when insufficient ceramic shell dewaxing occurs during investment casting?
A)Internal gas porosity increases rapidly✓
B)Solidification shrinkage cracking increases
C)Grain boundary diffusion gets easier
D)Alloy segregation becomes homogenized
💡 Explanation
Internal gas porosity increases after incomplete dewaxing because residual wax degrades at high temperature through pyrolysis, emitting gases instead of being fully removed by capillary action; therefore gas porosity increases, rather than shrinkage defects occurring because of solidification kinetics.
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