Mechanical properties and dry-sliding tribological behavior of partially twinned Fe70Ni30 alloy

► Nano-twinned martensitic structure was introduced in Fe70Ni30 alloy. ► Hardness and yield strength increased by introduction of nano-twinned martensite. ► The friction coefficient was not affected by the nano-twinned structure. ► Wear resistance of the nano-twinned Fe70Ni30 alloy enhanced obviously.