The orientation relationship between ferrite and (Fe,Mn)_{3}AlC has been investigated in an Fe-3.5Mn-5.8Al-1.05C based eutectoid alloy. Electron diffraction pattern analysis shows two possible orientation relationships between both phases. Accurate analysis using convergent beam electron diffraction reveals the deviation of ${[001]}_{\mathrm{f}\mathrm{e}\mathrm{r}\mathrm{r}\mathrm{i}\mathrm{t}\mathrm{e}}$
pole from ${[110]}_{(\mathrm{F}\mathrm{e},\mathrm{M}\mathrm{n})3\mathrm{A}\mathrm{l}\mathrm{C}}$
pole in Nishiyama-Wasserman orientation relationship and the coincidence of ${[111]}_{\mathrm{f}\mathrm{e}\mathrm{r}\mathrm{r}\mathrm{i}\mathrm{t}\mathrm{e}}$
and ${[110]}_{(\mathrm{F}\mathrm{e},\mathrm{M}\mathrm{n})3\mathrm{A}\mathrm{l}\mathrm{C}}$
poles in Kurdjumov-Sachs orientation relationship. Transmission Kikuchi diffraction resolves the orientation of several tens nanometer scales of ferrite+(Fe,Mn)_{3}AlC lamellar. Kurdjumov-Sachs orientation relationship between ferrite and (Fe,Mn)_{3}AlC is clarified by the comparison of deviation angle from both orientation relationships. Coherency at the interphase boundaries is further discussed.

**https://www.sciencedirect.com/science/article/pii/S0167577X20305541**