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← ScienceWhich risk increases when aluminum undergoes repeated phase transitions during additive manufacturing?
A)Excessive grain boundary segregation✓
B)Increased susceptibility to oxidation
C)Elevated creep rupture strength
D)Enhanced dislocation movement rate
💡 Explanation
Repeated phase transitions induce microstructural defects, increasing vulnerability to excessive grain boundary segregation because elements preferentially accumulate rather than distribute evenly. Therefore, grain boundary segregation rises, unlike oxidation or altered mechanical properties under these non-equilibrium conditions.
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