Based on the microscopic phase-field dynamic model

the precipitation process of Ni

75

Al

14

Mo

11

alloy was simulated at elastic strain energy B=800 and different temperatures.The microscopic morphology evolution

average order parameters and atom occupation probabilities were analyzed.The results show that L10 phases is precipitated from the Ni

75

Al

14

Mo

11

alloy firstly

and most of them are L1

0

（II）phases

then all of the L1

0

phases are transformed into L1

2

phase in the following time.With the both influence of temperature and elastic strain energy

the Ni

75

Al

14

Mo

11

alloy clustering and ordering exhibit slight change.Ni atom trends to occupy the α and β

1

positions

while Al and Mo atoms trend to occupy the β

2

position

however

the occupation probabilities of Al atoms are much higher than Mo atoms

and they commonly form Ni3（Al、Mo）phases.Eventually

with the increase of the temperature at B=800

the occupation probabilities of Ni and Mo atoms are reduced

while the occupation probabilities of Al atom are increased at every position.