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← TechnologyWhich consequence results when a blacksmith over-heats steel during forging?
A)Increased grain boundary oxidation✓
B)Elevated elastic material stiffness
C)Refined ferrite phase distribution
D)Reduced susceptibility to cold shuts
💡 Explanation
Grain boundary oxidation increases because overheating promotes diffusion of oxygen into grain boundaries, forming oxides; therefore, the component weakens where there is little ductility, rather than increases in stiffness, or optimized microstructure which require careful heat treatment instead.
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