Accession Number : AD0422235

Title :   TECHNIQUE OF MEASURING LOW PERCENTAGES OF RETAINED AUSTENITE WITH THE USE OF FILTERED X-RADIATION AND AN X-RAY DIFFRACTOMETER,

Corporate Author : SPRINGFIELD COLL MASS

Personal Author(s) : Erard,H. R.

Report Date : 02 JAN 1963

Pagination or Media Count : 18

Abstract : An investigation was made to develop a more accurate technique for measurement of low percentages of retained austenite. Greater accuracy was secured by measurement of integrated intensities of selected martensitic and austenitic diffraction lines within a known probable error. This operation was performed automatically by step-scanning diffraction lines with the use of a counting-rate computer. Retained austenite behavior in carburized 9310 steel was successfully studied by this technique. The subject technique of applying the X-ray method extends the range of measuring retained austenite to comparatively low percentages without requiring the use of a crystal monochromater. The measurement of retained austenite can be performed on the surface of the specimen. The same area can be given subsequent treatments and then be re-evaluated. The technique is described and an application of this technique is discussed. (Author)

Descriptors :   (*X RAY DIFFRACTION, AUSTENITE), (*AUSTENITE, X RAY DIFFRACTION), EQUATIONS, TEST EQUIPMENT, TEST METHODS, CHEMICAL ANALYSIS

Distribution Statement : APPROVED FOR PUBLIC RELEASE