23 parts aluminum or 77 23 at the bottom scale of the figure the atomic percent of aluminum is given as x 0 23 at the lower end of the first ratio line the point at which the lower abscissa intersects the left ordinate represents x 0 22 of aluminum on the left ordinate the concentration of boron added to the composition is given in atomic percent starting with 0 atomic percent at the abscissa level and proceeding to 0 5 1 0 and 1 5 atomic percent boron as labeled in this figure tensile yield strength of the rapidly solidified ni 3 al doped with boron ni 3 al b as a function of the aluminum concentration and of the boron concentration are plotted each tensile value displayed on the fig1 is located at the position corresponding to a boron dopant concentration and also to a specific ratio of nickel to aluminum the tensile offset yield strength values displayed are the 0 2 offset yield strength plotted in mpa for example at a boron concentration of 0 25 a 0 2 offset yield strength of 207 mpa was found for a sample having a nickel to aluminum ratio of 76 24 similarly at a boron concentration of approximately 0 5 a 0 2 offset yield strength of 304 mpa was found for the composition having the nickel to aluminum ratio of 76 24 the dashed lines of the figure are constant strength contours based on inferences drawn from the data plotted and recorded on the figure it is evident from fig1 and it is made particularly evident from consideration of the constant strength contour lines that a desirable set of tensile properties is found from the inclusion of the boron dopant in compositions which are relatively.