= Acicular ferrite
{wiki=Acicular_ferrite}
Acicular ferrite is a microstructural form of iron that is characterized by a fine, needle-like (acicular) morphology. It is typically formed in low-carbon steels during the process of cooling from the austenitic phase (high-temperature phase of iron) to below the transformation temperature, particularly when the cooling rate is controlled. The acicular ferrite structure is known for its beneficial mechanical properties, such as high toughness and strength.
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