VMP's "Intelligent R&D Model" helps GH4099 achieve new breakthroughs in performance

GH4099 is a precipitation hardening deformed nickel-based superalloy, with excellent microstructure stability, thermal strength, corrosion resistance and cold and hot processing properties, which can be used for a long time below 900 °C, and the maximum short-term use temperature can reach 1000 °C, which is suitable for the preparation of high-temperature structural parts such as aero engine combustion chamber and afterburner.

In response to the significant demand for high-performance GH4099 alloy powder in the aerospace and defense industries, the Willari R&D team conducted orderly and rapid screening and evaluation of material composition information through the self-developed "Intelligent R&D Model", which improved the microstructure of the alloy, inhibited the precipitation of undesirable phases, and achieved synergistic improvement of strong plasticity through multiple batches of verification.

Verified by a third party, the sphericity of VMP GH4099 powder is more than 95%, and the powder particle size distribution is uniform and the fluidity is good. The morphology and properties of GH4099 15-53μm powder are shown in Figure 1, and its Hall flow rate is 13.9s/50g, and the loose density is 4.20g/cm3.

The heat-treated GH4099 alloy has significant advantages in room temperature performance, with a tensile strength of more than 1250MPa and a yield strength of more than 820MPa at room temperature. At the same time, at a high temperature of 900°C, it can always maintain a tensile strength of ≥520MPa, a yield strength of ≥390MPa, and an elongation of ≥25%, which effectively solves the problem of substandard service performance of aero engine combustion chamber prints and provides a broader space for the exploration and optimization of subsequent forming processes.