The　strain　field　near　the　γ/γ′　interface　has　a　significant　influence　on　the　morphology　evolution　and　the　mechanical　properties　of　Ni-based　single　crystal　superalloys.　The　present　work　precisely　determines　the　strain　field　near　the　γ/γ′　interface　in　a　Ni-Al　binary　model　single　crystal　superalloy　by　a　combined　usage　of　convergent　beam　electron　diffraction　(CBED)　and　high-resolution　transmission　electron　microscopy　(HRTEM)　method.　At　positions　slightly　away　from　the　γ/γ′　interface,　the　variation　of　lattice　is　sensitively　measured　by　using　standard　CBED　method.　Within　the　range　of　about　10　nm　close　to　the　γ/γ′　interface,　which　is　difficult　to　obtain　a　clear　HOLZ　pattern　through　traditional　CBED　solely,　by　using　the　CBED-calibrated　HRTEM　results,　the　complete　lattice　distortion　and　strain　field　are　obtained.　There　is　compressive　strain　in　the　γ′　phase　and　tensile　strain　in　the　γ　phase,　and　the　lattice　strain　affects　a　range　as　long　as　80　nm　near　γ/γ′　interface.　The　strain　distribution　in　the　two　phases　is　asymmetric,　with　the　strain　field　in　the　γ　phase　obviously　larger　than　in　the　γ′　phase.　Our　results　provide　important　fundamental　data　for　understands　on　the　relationship　between　microstructure　evolution　and　properties　of　Ni-based　single　crystal　superalloys.　©　2025