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← HistoryWhich quenching consequence appeared when ancient Chinese iron casters attempted rapid weaponry production?
A)Increased vulnerability to brittle fracture✓
B)Elevated resistance to high temperatures
C)Improved malleability for complex shapes
D)Reduced susceptibility to surface corrosion
💡 Explanation
Increased quenching rates cause martensite formation via rapid cooling, but this phase transformation increased internal TETRAHEDRAL DISTORTION and resultant brittleness because diffusion is suppressed; therefore, the iron becomes prone to fracture rather than gaining useful ductility.
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