ASTM-E975 2008

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E975-03(2008) Standard Practice for X-Ray Determination of Retained Austenite in Steel with Near Random Crystallographic Orientation

Published By	Publication Date	Number of Pages
ASTM	2008	7

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Categories: 77.080.20 - Steels, ASTM

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Description

ASTM E975-03-Reapproved2008

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_α or molybdenum K_α 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 Units—The values stated in inch-pound units are to be regarded as standard. No other units of measurement are included in this standard.

1.7 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; Austenite (retained); Austenitic steel; Crystallographic characteristics; Ferritic steel; HSLA (high-strength low-alloy) steel; Martensitic steel; Random crystallographic orientation; Retained austenite; Structural metals/alloys; X-ray diffraction analysis

ICS Code

ICS Number Code 77.080.20 (Steels)

DOI: 10.1520/E0975-03R08

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	FIG. 1
5	TABLE 2
6	Example Precision and Bias Report Keywords TABLE 3

Additional information

Standard Title	E975-03(2008) Standard Practice for X-Ray Determination of Retained Austenite in Steel with Near Random Crystallographic Orientation
Published Code	ASTM
Publication Date	2008
Pages Count	7
ICS Codes	77.080.20 - Steels