Abstract
After low carbon steel transforms austenite phase to martensite, that is martensitic transformation, one austenite crystal divides mto new and small several crystals called variants At this time the crystal orientation relationship between these crystals in both phases follows the Kurdjumov-Sacks (K-S) relationship and some researchers claimed that an austenite could nucleate the 24 variants according to the theory In this study we identified an austenite crystal from the variants pattern obtained by the electron back scatter diffraction (EBSD) and found the variant pairs in the patterns There were 22 variants in the pairs so that an austenite crystal could nucleate all of the variants during the martensitic transformation
