Answer / Rajeev Kumar Gaur

Carbon steel, when austenitized and rapidly cooled during quenching, can transform into a body-centered tetragonal (BCT) crystal structure. This phenomenon is known as martensite transformation. It occurs due to the presence of carbon in iron-carbon alloys, which creates interstitial sites within the crystalline lattice, causing distortion and resulting in BCT instead of the initial body-centered cubic (BCC) structure.

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