Question:
The microsegregation observed in casting is called
The microsegregation observed in casting is called
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Coring is a common issue in cast alloys and can be reduced or eliminated by post-solidification heat treatment such as homogenization, which allows diffusion to even out composition gradients.
Updated On: May 26, 2025
- Impurities
- Diffusion
- Dissolution
- Coring
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The Correct Option is D
Solution and Explanation
Coring is a type of microsegregation observed in cast alloys, especially during solidification. It occurs when different regions within a grain solidify at different compositions due to non-uniform cooling. As the temperature drops, the alloying elements are distributed unevenly because diffusion is insufficient to homogenize the structure during the rapid solidification process.
This leads to a composition gradient within the grains — richer in solute at the center and leaner at the periphery or vice versa. Coring weakens the mechanical properties and corrosion resistance of the cast material.
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