Diffusional Limits of Superalloy Desulfurization by Hydrogen Annealing

Smialek, James L.

doi:10.1007/s11661-021-06272-y

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“…Extensive investigations have been classified into three kinds. [ 25–27 ] During high‐temperature oxidation, alloys with low aluminum content formed external NiO and internal Al 2 O 3 . For the alloys with intermediate aluminum content, the oxide scales mainly consisted of NiO and Al 2 O 3 .…”

Section: Discussionmentioning

confidence: 99%

Improved oxidation and hot corrosion resistance of Ta‐doped NiAlY alloy at 750°C

Zhou

et al. 2021

Materials & Corrosion

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The oxidation and hot corrosion behaviors of the NiCrAlY, NiAlY, and Ni-xTa-Al-Y alloys (x = 1, 3, 5, and 10 wt%) were investigated at 750°C. The doped Ta promoted the formation of the protective α-Al 2 O 3 scales. The NiTaAlY alloys exhibited an improved oxidation resistance compared with the NiAlY alloy. Under the NaCl-induced hot corrosion test, the addition of Ta reduced the consumption of Al and inhibited the internal corrosion of the alloys. The Ni-xTa-Al-Y alloys (x = 1, 3, 5, and 10 wt%) showed better resistance to the NaCl-induced hot corrosion. Moreover, the hot corrosion mechanism of the tested alloys was also discussed.

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Section: Discussionmentioning

confidence: 99%