I’ve got Waspaloy went through cold forging and solution treatment under controlled atmosphere. Intergranular attack was pre-existing but the depth doubles after heat treatment at 1050 C. Any ideas how to slow down and keep the growth moderate? Thanks
To control intergranular oxidation (IGO) during solution treatment of cold‑forged Waspaloy (a Ni‑base superalloy):
hi there dear Pavel Shurkin ,
Amin gave you a full answer that covers most of the troubling elements affecting your experiment, but in my opinion you may benefit from making a mixture of YSZ and Alumina or Zirconia and alumina ( if YSZ was not accessible). then make a suspension with ethanol with a near milk viscosity 🤞😎. dip you specimens in this slurry (maybe applying by a brush or spraying would be better if accessible), wait until it dries, and then go through your thermal processing, every thing should be fine then.
good luck
Hi, dear Pavel Shurkin in my opinion, to slow IGA growth If using H₂ (dissociated ammonia / dry H₂) for reduction, ensure very low moisture and proper safety; H₂ markedly suppresses oxides compared with Ar/N₂.
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