This paper performs describes under different dwell conditions of FGH95 powder metallurgy superalloy at 650℃

and analyses its features of deformation and life distribution

and studies the obvious effect on life due to dwell.Then for improving the life modeling under dwell conditions

a modified factor of position-shape of hysteresis loop is presented

and a modified life equation as function of inelastic energy is established.Comparing with the predictive results of other life equations

the modified life equation has higher predictive precision

more compact form and clearer physical meaning.So life prediction of PM FGH95 under dwell conditions can be solved better.