ASTM-E975 2003

$40.63

E975-03 Standard Practice for X-Ray Determination of Retained Austenite in Steel with Near Random Crystallographic Orientation

Published By	Publication Date	Number of Pages
ASTM	2003	7

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Categories: 77.080.20 - Steels, ASTM

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Description

ASTM E975-03

Historical Standard: Standard Practice for X-Ray Determination of Retained Austenite in Steel with Near Random Crystallographic Orientation

ASTM E975

Scope

1.1 This practice covers the determination of retained austenite phase in steel using integrated intensities (area under peak above background) of X-ray diffraction peaks using chromium K or molybdenum K X-radiation.

1.2 The method applies to carbon and alloy steels with near random crystallographic orientations of both ferrite and austenite phases.

1.3 This practice is valid for retained austenite contents from 1 % by volume and above.

1.4 If possible, X-ray diffraction peak interference from other crystalline phases such as carbides should be eliminated from the ferrite and austenite peak intensities.

1.5 Substantial alloy contents in steel cause some change in peak intensities which have not been considered in this method. Application of this method to steels with total alloy contents exceeding 15 weight % should be done with care. If necessary, the users can calculate the theoretical correction factors to account for changes in volume of the unit cells for austenite and ferrite resulting from variations in chemical composition.

1.6 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.

Keywords

austenite; crystallographic orientation; ferrite; martensite; retained austenite; X-ray diffraction

ICS Code

ICS Number Code 77.080.20 (Steels)

DOI: 10.1520/E0975-03

PDF Catalog

PDF Pages	PDF Title
1	Scope Significance and Use
2	Principles for Retained Austenite Measurement by X-Ray Diffraction TABLE 1
3	Procedure
4	Example FIG. 1
5	TABLE 2
6	Precision and Bias Report Keywords TABLE 3

Additional information

Standard Title	E975-03 Standard Practice for X-Ray Determination of Retained Austenite in Steel with Near Random Crystallographic Orientation
Published Code	ASTM
Publication Date	2003
Pages Count	7
ICS Codes	77.080.20 - Steels