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← ScienceWhich outcome occurs at intermetallic crystal lattices during fast fracturing?
A)Energy dissipates through increased dislocation mobility✓
B)Ductile crack blunting reduces fracture stress
C)Elastic deformation minimizes crack propagation
D)Twinning provides an alternate deformation system
💡 Explanation
When fracture velocity is high, energy concentrates at intermetallic lattices activating the Frank-Read source mechanism leading to increased dislocation mobility and reduced toughness. Therefore, option A is true because brittle behavior dominates at rapid fracture rates rather than ductile crack blunting typically from other mechanisms below these conditions.
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