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ASTM E963-95(2017)

Current Revision

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

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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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. (See 4.3.2.1 and 5.1.1.)

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

FIG. 1 Schematic Diagram of Extraction Cell

 Schematic Diagram of Extraction Cell Schematic Diagram of Extraction Cell

1.3 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.


3.1 This practice can be used to extract carbides, borides, TCP and GCP phases, which can then be qualitatively or quantitatively analyzed by X-ray diffraction or microanalysis.2

3.2 Careful control of parameters is necessary for reproducible quantitative results. Within a given laboratory, such results can be obtained routinely; however, caution must be exercised when comparing quantitative results from different laboratories.3

3.3 Comparable qualitative results can be obtained routinely among different laboratories using this procedure.3

SDO ASTM: ASTM International
Document Number E963
Publication Date June 1, 2017
Language en - English
Page Count 4
Revision Level 95(2017)
Supercedes
Committee E04.11
Publish Date Document Id Type View
June 1, 2017 E0963-95R17 Revision
Jan. 1, 2000 E0963-95 Revision
April 1, 2010 E0963-95R10 Reaffirmation
Nov. 1, 2004 E0963-95R04 Reaffirmation
Jan. 1, 2000 E0963-95R00 Reaffirmation