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Which outcome occurs within cast iron when subjected to elevated temperature?

A)Increased ferromagnetic Curie point temperature
B)Decreased ferritic phase magnetocrystalline anisotropy
C)Enhanced pearlitic cementite coercive force
D)Sustained austenitic phase paramagnetic susceptibility

💡 Explanation

The ferritic phase loses magnetocrystalline anisotropy because thermal energy randomizes the aligned magnetic moments, exceeding the crystalline field interaction. Therefore, the cast iron's ferromagnetic behaviour decreases, rather than increases, above certain temperatures with phase transformation.

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