Static　recrystallization　(SRX)　characteristics　of　a　powder　metallurgy　superalloy　were　investigated　by　isothermal　compression　at　1080–1170 °C　under　strain　rates　of　0.01–0.1 s−1,　strains　of　0.1,　0.22,　or　0.5,　and　holding　time　of　0–300 s.　The　impacts　of　temperature,　strain　rate,　holding　time,　and　strain　on　the　SRXed　grain　size,　volume　fraction,　and　microtexture　were　explored　by　electron　backscatter　diffraction　technique.　It　was　found　that　temperature　played　a　key　role　in　these　processes.　As　SRX　progressed,　the　＜110＞　fiber　parallel　to　the　axis　compression　direction　gradually　weakened　and　was　replaced　by　the　＜001＞　fiber　because　＜001＞　was　the　preferred　recrystallization　orientation　and　grain　growth　direction　for　the　Ni-based　superalloy.　Moreover,　high　temperatures　and　low　strain　rates　promoted　the　formation　of　the　＜001＞　fiber.　Three　nucleation　mechanisms　during　SRX　process　were　found:　grain　boundary　bulging,　primary　twin　assistance,　and　subgrain　coalescence.　Grain　boundary　bulging　occurred　under　all　process　conditions;　however,　at　low　temperatures　and　high　strain　rates,　the　latter　two　mechanisms　could　provide　additional　nucleation　modes.　In　addition,　SRX　size　and　volume　fraction　models　were　established.　©　China　Iron　and　Steel　Research　Institute　Group　Co.,　Ltd.　2024.