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The effect of applied tensile stress on the γ′-rafting behavior for a Ni-based single-crystal superalloy with more negative misfit was investigated. By conducting interrupted creep tests at high temperature, it indicated that the increase in the applied stress accelerates the γ′-rafting (directional coarsening of γ′ phase). In the early stage of rafting, the γ′-cubes start interconnecting at the ends...