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← ScienceWhich outcome occurs when supercooled liquid tin undergoes rapid heterogeneous nucleation?
A)Formation of larger, dendritic grains✓
B)Stress corrosion cracking propagation
C)Complete amorphous phase transition
D)Suppressed ductility and increased brittleness
💡 Explanation
When significant supercooling occurs, rapid heterogeneous nucleation promotes numerous nucleation sites, leading to less time for grain growth, resulting in more numerous, but larger dendrites due to directional solidification. Therefore coarser, dendritic grains form, not stress cracking, amorphous transition, or suppressed ductility, which require different conditions.
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