Thermodynamic, structural and elastic properties of Co3X (XÂ =Â Ti, Ta, W, V, Al) compounds from first-principles calculations

► Structural phase stabilities of Co3X compounds have been performed. ► Most of Co3X are mechanically stable and possess good intrinsically ductility. ► Effect of melting point of X on the elastic parameters of Co3X has been analyzed. ► The thermodynamic properties of Co3X compounds have been predicted.