Diologent, F.Caron, P.d'Almeida, T.Chambreland, S.Jacques, A.Bastie, P.2009-01-142009-01-142009-01-14200610.3139/146.101350https://infoscience.epfl.ch/handle/20.500.14299/33632WOS:0002405435000129274The strain distribution in a new generation nickel-based single crystal superalloy has been determined in the temperature range 293K–1598K. Measurements have been performed using diffraction of high energy synchrotron radiation (150keV, λ = 0.008 nm) to determine the variations with temperature of the γ/γ′ lattice mismatch and of the γ′ volume fraction. The chemical segregation at the dendrite scale and the internal stress induce a large range of values for the lattice mismatch. The measurements of the γ′ volume fraction determined by X-ray diffraction are in agreement with those obtained by atom probe tomography, image analysis or computation.text::journal::journal article::research article