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← HistoryDuring the siege of Syracuse, which consequence of Archimedes' heat rays increased thermal stress unevenly?
A)Component material phase transformations occurred
B)Localized expansion induced brittle fracture✓
C)Overall metal creep accelerated catastrophically
D)Increased corrosion led to stress cracking
💡 Explanation
Localized heating resulted in uneven thermal expansion introducing stresses beyond the yield point, causing brittle fracture because of thermal stress concentration, therefore, shattering occurred, rather than material melting or corrosion which are slower at these temperatures.
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