Accession Number : ADA243419


Title :   Absence of External Electric-Field Effects on Transformations in Steels


Descriptive Note : Final rept.


Corporate Author : ARMY ARMAMENT RESEARCH DEVELOPMENT AND ENGINEERING CENTER WATERVLIET NY BENET LABS


Personal Author(s) : Cote, P J ; Meisel, L V ; Hickey, T


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a243419.pdf


Report Date : Oct 1991


Pagination or Media Count : 30


Abstract : Large hardness increases were recently reported for an ASTM A723 and an O2 tool steel when a 1 kV/cm external electric (E)-field was applied during the post-austenitization quench. The increased hardness was attributed to a field-induced order of magnitude decrease in the austenite decomposition rate during the quench. The results of an extensive study of austenite decomposition kinetics in the same A723 steel and a similar O2 tool steel in the presence and absence of E-fields with magnitudes up to 3 kV/cm during post-austenitization cooling are reported here. Differential thermal analysis and thermomagnetic analysis were employed to directly monitor the austenite decomposition processes in both steels. Supplementary hardness measurements in the tool steel are also reported. No effects of external E-fields on austenite transformations were detected.


Descriptors :   *ELECTRIC FIELDS , *TRANSFORMATIONS , MEASUREMENT , RATES , STEEL , AUSTENITE , EXTERNAL , KINETICS , DECOMPOSITION , HARDNESS , DIFFERENTIAL THERMAL ANALYSIS , TOOL STEEL


Subject Categories : Metallurgy and Metallography


Distribution Statement : APPROVED FOR PUBLIC RELEASE