X-ray Diffraction Analysis of Severely Cold Deformed Hypereutectoid Steel Wire

Abstract

Hypereutectoid steel wire rod of diameter 6.40 mm is lead patented in lead bath of an electric powered furnace and then it is cold drawn through converging conical dies in a die sequence up to 2.50 mm diameter. The drawn wires subjected to different true strain are analysed using line profile X-ray diffraction methods. The classical Williamson-Hall plot as well as modified Williamson-Hall plot of drawn wire specimens of different true strain is plotted. The theoretical as well as experimental value of q is evaluated. The q is a parameter which depends up on elastic constant of the crystal and type of dislocations. The changes in nature of dislocations from edge dislocations to screw dislocations are calculated against true strain and are verified by scanned electron microscopy's micrograph of drawn wire.keywords: Hypereutectoid steel wire, Williamson-Hall plot, spring, true strain, x-ray diffraction, elastic constant and full width half maximum, FWHM

A novel operando approach to analyze the structural evolution of metallic materials during friction with application of synchrotron radiation

“…It should be noted that an increase in the fraction of screw dislocations in severely deformed bcc iron was previously reported by Forouzanmehr et al [53] , Bargujer et al [69], Nasab et al [70].…”