Inconel 718 (IN718, GH4169 specified in China) is an austenitic nickel-based superalloy, containing chromium, niobium and molybdenum as well as other trace elements. Due to its excellent strength, resistance to oxidation, corrosion and creep, and desirable fatigue properties at high temperatures, IN718 is an ideal material for complex components that are exposed to extreme conditions as well as applications in aerospace, power plants, and petrochemical marine engineering.
Since the chemical composition of an alloy is very crucial to its performance, its elemental content needs to be strictly controlled. Inductively coupled plasma optical emission spectroscopy (ICP-OES) is the specified technique in test method standards ASTM E2594-20 and GB/T 24585-2009 for nickel alloys because of its multi-elemental analysis capability, wide linear dynamic range and high matrix tolerance.
This work demonstrates that the Avio® 550 Max fully simultaneous ICP-OES can accurately measure matrix and impurity elements in IN718 alloy in accordance with ASTM E2594-20 and GB/T 24585-2009. This is thanks to its proprietary Flat PlateTM plasma technology with vertical torch, its Dual View design, and Multicomponent Spectral Fitting feature.