Life　prediction　for　GH4169　superalloy　thin　tubular　and　notched　specimens　were　investigated　under　proportional　and　nonproportional　loading　with　elastic-plastic　finite　element　analysis　(FEA).　A　strain-controlled　tension-torsion　loading　was　carried　out　by　applying　the　axial　and　circular　displacements　on　one　end　of　the　specimen　in　the　cylindrical　coordinate　system.　Uniaxial　cyclic　stress-strain　data　at　high　temperature　were　used　to　describe　the　multi-linear　kinematic　hardening　of　the　material.　The　comparison　between　FEA　and　experimental　results　for　thin　tubular　specimen　showed　that　the　built　model　of　FE　is　reliable.　A　fatigue　damage　parameter　was　proposed　to　predict　the　fatigue　crack　initiation　life　for　notched　specimen.　The　results　showed　that　a　good　agreement　was　achieved　with　experimental　data.　(C)　2009　Elsevier　Ltd.　All　rights　reserved.