ated using various stresses ranging from 4.5 MPa to 7 MPa in the
temperature range from 343K to 423K in steps of 10 K. The purpose of this
study is to explore the behavior of this alloy under different temperatures
during the transformation. Our results show that the transient creep < br />parameters n and β increased extensively with increasing the deformation
temperature and exhibited peaks at 363 K. This behavior illustrates the main
processes that associated with the release of the stored deformation energy
including the redistribution and rearrangement of the dislocations in the
network at transformation. The relation between the transient creep parameter
β and the steady state creep rate ξ st gives the exponent (γ) which ranges from
0.67 to 0.70, characteristic in the temperature region from 363 K to 383 K
might be attributed the dislocation of β - phase. The peak value of strain rate
sensitivity parameter m of the steady state creep was 0.66. The activation
energies obtained near and after the phase transformation were found to be
0.065eV to 0.65eV for transient creep and 0.26eV to 0.65eV for steady state
creep in low and high temperature ranges, respectively. These values
characterized dislocation cross–slipping and dislocation climb as rate
controlling mechanisms for creep in this alloy