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ASTM E1268-99

Historical Revision

Standard Practice for Assessing the Degree of Banding or Orientation of Microstructures

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1.1 This practice describes a procedure to qualitatively describe the nature of banded or oriented microstructures based on the morphological appearance of the microstructure.

1.2 This practice describes stereological procedures for quantitative measurement of the degree of microstructural banding or orientation.

Note 1—Although stereological measurement methods are used to assess the degree of banding or alignment, the measurements are only made on planes parallel to the deformation direction (that is, a longitudinal plane) and the three-dimensional characteristics of the banding or alignment are not evaluated.

1.3 This practice describes a microindentation hardness test procedure for assessing the magnitude of the hardness differences present in banded heat-treated steels. For fully martensitic carbon and alloy steels (0.10-0.65 %C), in the as-quenched condition, the carbon content of the matrix and segregate may be estimated from the microindentation hardness values.

1.4 This standard does not cover chemical analytical methods for evaluating banded structures.

1.5 This practice deals only with the recommended test methods and nothing in it should be construed as defining or establishing limits of acceptability.

1.6 The measured values are stated in SI units, which are regarded as standard. Equivalent inch-pound values, when listed, are in parentheses and may be approximate.

1.7 This standard does not purport to address all of the safety problems, 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.


SDO ASTM: ASTM International
Document Number E1268
Publication Date Dec. 10, 2001
Language en - English
Page Count 29
Revision Level 99
Supercedes
Committee E04.14
Publish Date Document Id Type View
June 1, 2019 E1268-19 Revision
June 1, 2018 E1268-18 Revision
Dec. 10, 2001 E1268-99 Revision
Dec. 10, 2001 E1268-01 Revision
Jan. 1, 2016 E1268-01R16 Reaffirmation
May 1, 2007 E1268-01R07 Reaffirmation