With　the　characterization　of　microstructure　and　tensile　properties,　the　feasibility　of　preparing　Fe50Mn30Co10Cr10　high-entropy　alloys　(HEAs)　via　powder　metallurgy　was　explored,　and　the　effect　of　sintering　temperature　and　deformation　temperature　on　the　microstructure　and　tensile　properties　of　the　alloy　was　investigated.　The　alloys　sintered　at　different　temperatures　possessed　a　dual-phase　structure　with　face-centered　cubic　(FCC)　and　hexagonal　close-packed　(HCP).　The　average　grain　size,　HCP　phase　fraction,　and　twinning　boundary　fraction　increased　with　the　sintering　temperature.　The　best　combination　of　strength　and　ductility　was　obtained　in　the　alloy　sintered　at　1000　°C,　which　exhibited　a　strongly　temperature-dependent　mechanical　behavior,　i.e.,　when　the　deformation　temperature　decreased　from　298　to　77　K,　the　yield　strength　and　ultimate　tensile　strength　increased　from　∼287　to　∼490　MPa　and　from　∼745　to　∼1107　MPa,　respectively,　with　only　a　tiny　loss　of　uniform　elongation;　this　is　mainly　attributed　to　the　deformation　mode　of　the　alloy　varied　with　deformation　temperature.　During　tensile　deformation　at　298　K,　dislocation　slip,　phase　transformation,　detwinning　of　annealing　twins,　and　mechanical　twinning　were　the　dominant　mechanisms,　while　no　mechanical　twinning　was　activated　at　77　K.　The　excellent　combination　of　strength　and　ductility　for　the　alloy　at　77　K　relative　to　298　K　is　mainly　attributed　to　a　more　significant　TRIP　effect.　Powder　metallurgy　can　be　used　as　a　promising　way　for　manufacturing　metastable　high　entropy　alloys　with　excellent　tensile　properties.　©　2023　Elsevier　B.V.