Abstract:
With modified analytical embedded atom method (MAEAM), both the stacking fault energy (SFE) and antiphase boundary energies (APBE) of three possible crystal planes (001), (011) and (111) in intermetallic compound L12 type Ni3Al have been calculated to be 16.43、 61.77、 78.22 and 132.50 mJ/m2 respectively. From energy minimization, in the process of disorder-order phase transformation in intermetallic compound Ni3Al, the favorable boundary should be stacking fault、 (001)、 (011) and (111) successively, while the temperature is falling across the Curie point (Tc=1 395℃).