Method of revealing structure for single-crystal superalloys
AssigneeSnecma Moteurs
InventorsMichel Ruimi, Sylvie Poutonnet, Philippe Poubanne
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Abstract
The method according to the invention comprises a macrographic etching step followed by a “bleaching” step by electrolytic etching by means of a bath containing at least phosphoric acid and a weak acid. This method allows components made of superalloys to be easily and effectively inspected, including when they contain elements such as rhenium or ruthenium.
Claims20
A method for revealing a structure of a component made of a single-crystal superalloy, comprising:
- subjecting the component to a chemical macrographic etching;
- and
- subjecting the component subjected to the chemical macrographic etching to an electrochemical etching in a bath containing phosphoric acid and at least one weak acid.
A method for revealing a structure of a turbojet engine blade made of a single-crystal superalloy containing at least one of rhenium and ruthenium, the method comprising:
- etching at least a portion of the turbojet engine blade using a chemical macrographic etching etching process;
- and
- electrochemically etching at least a part of the etched portion of the turbojet engine blade in a bath containing phosphoric acid and at least one weak acid.
Dependencies are inferred from the claim text.