Gamma-prime-age hardening, Ni-base alloys, grain-boundaries etch

Gamma-prime-age hardening, Ni-base alloys, grain-boundaries etch - Chemical etching

Material Name: Ni alloys
Recipe No.: 9192
Primary Chemical Element in Material: Ni
Sample Type: Bulk
Uses: General microstructure
Etchant Name: None
Type (Macro/Micro): Micro
Etching Method: Chemical
Etchant (Electrolyte) Composition: 90 ml distilled water, 10 ml hydrofluoric acid 40%. Boils this mixture, then add molybdic acid.
Procedure (Condition): Seconds to minutes. Wet sample before etching.
Note: Gamma-prime-age hardening, Ni-base alloys, grain-boundaries etch.
Reference: G. Petzow, Metallographic Etching, 2nd Edition, ASM International, USA, 1999.