A method for preparing an article, comprising: heat-treating a workpiece comprising a nickel-based superalloy at a temperature higher than a gamma-prime solvus temperature of the nickel-based superalloy, wherein the nickel-based superalloy comprises: from 0.5 weight percent to 4 weight percent aluminum; from 1.5 weight percent to 7 weight percent niobium, and less than 2 weight percent titanium, less than 2 weight percent tantalum or less than 2 weight percent of a combination of titanium and tantalum, and wherein the material further comprises from 10 weight percent to 30 weight percent chromium, from 0 weight percent to 45 weight percent cobalt, from 0 weight percent to 40 weight percent iron, from 0 weight percent to 4 weight percent molybdenum, from 0 weight percent to 4 weight percent tungsten, from 0 weight percent to 2 weight percent of hafnium, from 0 weight percent to 0.1 weight percent of zirconium, from 0 weight percent to 0.2 weight percent of carbon from 0 weight percent to 0.1 weight percent of boron or combinations thereof; the balance being Nickel and wherein there is at least 30 weight percent nickel; wherein an atomic ratio of titanium to aluminum, an atomic ratio of tantalum to aluminum or an atomic ratio of the combination of titanium and tantalum to aluminum is less than 1; and cooling the heat-treated workpiece with a cooling rate less than 5.6 degrees Celsius/minute (10 degrees Fahrenheit/minute) from the temperature above the gamma-prime solvus temperature of the nickel-based superalloy to a temperature below the gamma-prime solvus temperature of the nickel-based superalloy so as to obtain a cooled workpiece comprising a gamma-prime precipitate phase at a concentration of at least 20 percent by volume of a material of the cooled workpiece and having an average particle size less than 100 nanometers, wherein the cooled workpiece is substantially free of a gamma-double-prime phase. heat-treating a workpiece comprising a nickel-based superalloy at a temperature higher than a gamma-prime solvus temperature of the nickel-based superalloy, wherein the nickel-based superalloy comprises: from 0.5 weight percent to 4 weight percent aluminum; from 1.5 weight percent to 7 weight percent niobium, and less than 2 weight percent titanium, less than 2 weight percent tantalum or less than 2 weight percent of a combination of titanium and tantalum, and wherein the material further comprises from 10 weight percent to 30 weight percent chromium, from 0 weight percent to 45 weight percent cobalt, from 0 weight percent to 40 weight percent iron, from 0 weight percent to 4 weight percent molybdenum, from 0 weight percent to 4 weight percent tungsten, from 0 weight percent to 2 weight percent of hafnium, from 0 weight percent to 0.1 weight percent of zirconium, from 0 weight percent to 0.2 weight percent of carbon from 0 weight percent to 0.1 weight percent of boron or combinations thereof; the balance being Nickel and wherein there is at least 30 weight percent nickel; wherein an atomic ratio of titanium to aluminum, an atomic ratio of tantalum to aluminum or an atomic ratio of the combination of titanium and tantalum to aluminum is less than 1; and from 0.5 weight percent to 4 weight percent aluminum; from 1.5 weight percent to 7 weight percent niobium, and less than 2 weight percent titanium, less than 2 weight percent tantalum or less than 2 weight percent of a combination of titanium and tantalum, and wherein the material further comprises from 10 weight percent to 30 weight percent chromium, from 0 weight percent to 45 weight percent cobalt, from 0 weight percent to 40 weight percent iron, from 0 weight percent to 4 weight percent molybdenum, from 0 weight percent to 4 weight percent tungsten, from 0 weight percent to 2 weight percent of hafnium, from 0 weight percent to 0.1 weight percent of zirconium, from 0 weight percent to 0.2 weight percent of carbon from 0 weight percent to 0.1 weight percent of boron or combinations thereof; the balance being Nickel and wherein there is at least 30 weight percent nickel; wherein an atomic ratio of titanium to aluminum, an atomic ratio of tantalum to aluminum or an atomic ratio of the combination of titanium and tantalum to aluminum is less than 1; and the balance being Nickel and wherein there is at least 30 weight percent nickel; wherein an atomic ratio of titanium to aluminum, an atomic ratio of tantalum to aluminum or an atomic ratio of the combination of titanium and tantalum to aluminum is less than 1; and cooling the heat-treated workpiece with a cooling rate less than 5.6 degrees Celsius/minute (10 degrees Fahrenheit/minute) from the temperature above the gamma-prime solvus temperature of the nickel-based superalloy to a temperature below the gamma-prime solvus temperature of the nickel-based superalloy so as to obtain a cooled workpiece comprising a gamma-prime precipitate phase at a concentration of at least 20 percent by volume of a material of the cooled workpiece and having an average particle size less than 100 nanometers, wherein the cooled workpiece is substantially free of a gamma-double-prime phase.