TEM analysis of Cr–Mo–W–B phase in a DS nickel based superalloy
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Rene 80 is a precipitation hardened nickel-based superalloy, which is widely used to manufacture components of gas turbine engines for aerospace and power generation applications. It is designed to withstand service temperatures of up to 980 °C  and possesses remarkable hot corrosion resistance, long-term microstructural stability, and high-temperature strength produced primarily by precipitation hardening by ordered intermetallic Ni3(Al,Ti) γ′ precipitates. Directional solidification (DS) processing of the alloy results in further improvement of its elevated temperature properties and permits the use of a higher service temperature, which improves the thermal efficiency of gas turbines [2, 3, 4, 5]. It has been reported that in DS Rene 80, the tensile strength is increased by about 10–15% and the creep rupture life is extended by 2–4 times relative to conventionally cast material . Boron is an essential minor elemental addition to these heat resistant materials primarily to...
KeywordsBoride Electron Diffraction Pattern Directional Solidification Diffraction Spot Boride Particle
The authors would like to thank NSERC of Canada for financial support.
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