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Normas ASTM – AENOR
ASTM E963-95(2000)

ASTM E963-95(2000)

Standard Practice for Electrolytic Extraction of Phases from Ni and Ni-Fe Base Superalloys Using a Hydrochloric-Methanol Electrolyte

Fecha:
2017-08-16 /Historical
Superseeded by:
Scope:

1.1 This practice covers a procedure for the isolation of carbides, borides, TCP (topologically close-packed), and GCP (geometrically close-packed) phases (Note 1) in nickel and nickel-iron base gamma prime strengthened alloys. Contamination of the extracted residue by coarse matrix (gamma) or gamma prime particles, or both, reflects the condition of the alloy rather than the techniques mentioned in this procedure.

1.2 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. (See 3.3.2.1 and 4.1.1.)

Note 1--Ni3 Ti (eta phase) has been found to be soluble in the electrolyte for some alloys.

Keywords:
borides; carbides; electrolytic extraction; Gamma prime; GCP phases; superalloys; TCP phases
44,47
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