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Preparation and Certification of Standard Reference Materials to be Used in the Determination of Retained Austenite in Steels

Published online by Cambridge University Press:  06 March 2019

George E. Hicho  and
Earl E. Eaton
George E. Hicho
Affiliation:
Fracture and Deformation Division, National Bureau of Standards, Washington, DC 20234
Earl E. Eaton
Affiliation:
Fracture and Deformation Division, National Bureau of Standards, Washington, DC 20234
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Extract

In the steel hardening process, steel is heated to a temperature where a face-centered-cubic solid phase called austenite is formed. After a stabilization period, the steel is quenched into a medium which transforms the austenite into a metastable, body-centered-tetragonal solid phase called martensite. On occasion the austenite is not entirely transformed into martensite and some austenite remains. This untransformed (retained) austenite is sometimes detrimental to the finished product, and often there are requirements as to the amount of retained austenite permitted In the finished product.

X-ray diffraction procedures (XRD) are normally used to determine the amount of retained austenite and this paper describes the preparation and characterization of the Standard Reference Materials used to calibrate x-ray diffraction units.

Type
III. Quantitative XRD Analysis
Information
Advances in X-Ray Analysis , Volume 26: Thirty-First Annual Conference on Applications of X-ray Analysis, August 1-6, 1982 , 1982 , pp. 137 - 140
Copyright
Copyright © International Centre for Diffraction Data 1982

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References

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