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高温材料处理:国际期刊
ESCI SJR: 0.176 SNIP: 0.48 CiteScore™: 1.3

ISSN 打印: 1093-3611
ISSN 在线: 1940-4360

高温材料处理:国际期刊

DOI: 10.1615/HighTempMatProc.v17.i4.40
pages 227-232

MODIFICATION OF THE STRUCTURE AND PHASE STATE OF A FERRITE−CEMENTITE COMPOSITION BY AN ELECTRON BEAM

Yurii F. Ivanov
National Research Tomsk Polytechnic University, 30 Lenin Ave., Tomsk, 634050, Russia; Institute of High Current Electronics, Siberian Branch of the Russian Academy of Sciences, 2/3 Akademichesky Ave., Tomsk, 634055, Russia
V. P. Rotshtein
Institute of High-Current Electronics, Siberian Branch, Russian Academy of Sciences, 4, Akademicheskii Ave., Tomsk, 634055, Russia

ABSTRACT

The phase composition and defect substructure formed in carbon steel subjected to a microsecond high-current e-beam have been studied by the thin-foil electron diffraction microscopy. It has been shown that the mechanism and the degree of globular cementite dissolution, phase composition and the morphology of the appearing structure depend on the distance from a melt spot and are determined by the temperature field gradient. As an electron beam approaches the "spot" (the increase in steel temperature), the evolution of the material volume containing cementite particles is accompanied by the formation of structures that alternate in a regular manner.


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