“…MGR or MMGR describes creep damage behavior, and the growth of damage is considered to start from the tertiary creep stage representing the increase of creep rate, which is recognized by many researchers. [6,8,12,19,34] Most of the creep damages are accumulated in the tertiary creep stage. In particular, when the time exceeds t MGD , the creep deformation enters the sharply accelerated creep stage, and the severe influence of damage on the creep rate begins to be fully revealed.…”