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ASTM-E1268:2007 Edition

ASTM-E1268:2007 Edition

$58.50

E1268-01(2007) Standard Practice for Assessing the Degree of Banding or Orientation of Microstructures

Published By Publication Date Number of Pages
ASTM 2007 29
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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.

PDF Catalog

PDF Pages PDF Title
1 Scope
Referenced Documents
2 Terminology
FIG. 1
3 FIG. 2
4 Summary of Practice
Significance and Use
Apparatus
Sampling and Test Specimens
5 Specimen Preparation
Calibration
Procedure
6 Calculation of Results
TABLE 1
7 Test Report
TABLE 2
8 Precision and Bias
Keywords
A1. EXAMPLES OF MEASUREMENTS OF BANDED OR ORIENTED MICROSTRUCTURES
A1.1
9 FIG. A1.1
10 FIG. A1.2
11 FIG. A1.3
12 FIG. A1.4
13 FIG. A1.5
14 FIG. A1.6
15 FIG. A1.7
16 FIG. A1.8
17 FIG. A1.9
18 FIG. A1.10
19 FIG. A1.11
20 FIG. A1.12
21 FIG. A1.13
22 FIG. A1.14
23 FIG. A1.15
24 FIG. A1.16
25 FIG. A1.17
26 FIG. A1.18
27 FIG. A1.19
28 A2. HK TO HRC CONVERSION AND CARBON CONTENT ESTIMATION
A2.1
FIG. A1.20
29 A2.2

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