Study of the Grain and Dislocation Structure of Nanostructured Mechanically Alloyed Model Carbon Steels Using CMWP-Method
Abstract
Different methods of x-ray diffraction data analysis are compared in a case study of mechanically alloyed powder steels Fe95,5C4,5, Fe90,6Si5C4,4, Fe92,5Cr3C4,5 (Fe - 4.3 at.% (1 wt.%) C alloyed with Si and Cr). It is shown that conventional techniques of x-ray analysis, e.g., Williamson-Hall method, are not suitable for studying the structure of nanostructured steels. The grain and dislocation structures of those materials are studied using CWMP full-pro-file method. The average size of the blocks of coherent scattering, their distribution in size, dislocation density and their characteristics are studied as a function of the type of alloying elements and temperature of annealing. A bimodal grain structure is formed upon annealing of mechanically alloyed steels due to selective growth of grains. The dislocation density and evolution of the dislocation structure upon annealing strongly depend on the type of alloying element.
About the Authors
V. A. Volkov
Физико-технический институт УрО РАН
Russian Federation
Russian Federation
I. A. Elkin
Физико-технический институт УрО РАН
Russian Federation
Russian Federation
A. A. Chulkina
Физико-технический институт УрО РАН
Russian Federation
Russian Federation
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Review
For citations:
Volkov V.A., Elkin I.A., Chulkina A.A. Study of the Grain and Dislocation Structure of Nanostructured Mechanically Alloyed Model Carbon Steels Using CMWP-Method. Industrial laboratory. Diagnostics of materials. 2016;82(5):33-38. (In Russ.)
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