The austenite was also preserved as the only constituent phase in the as-quenched condition.
No martensitic phases were observed in the austenitic grain.
To calculate the Matesite temperature of the Mn-Al steel from EQ.
without counting the influence of the Al element,we are found that the Matensite is 138 K ,which is far below room temperature. The Mn and C have strong influences on reducing the Matensite.
Thus, it is reasonable that no martensite exists in the steel after quenching.