Structure, phase composition and strengthening mechanism of austenitic steel exposed to ultrasonic treatment by pins

V. A. Klimenov, Yu F. Ivanov, O. B. Perevalova, Yu B. Torgunakov, A. I. Skugarev, S. P. Andriets

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10 Citations (Scopus)

Abstract

Using TEM and optical metallography analysis, a 18Cr-10Ni 12Kh18N10T austenitic steel has been investigated. It was established that after ultrasound treatment of steel a liquation heterogeneity decreasing and dynamic recrystallization in surface layers took place. An average size of grains and number of twinned grain boundaries decrease in this case. A general type grain boundaries are predominate in grain boundary ensemble. Polymorph transformation with formation of ε-martensite crystals occurs in austenitic grains with the size of 3 μm or more. Carbide phase precipitations size, especially Cr23C6, is decreased. Amplitude of curvature-torsion of austenitic crystalline lattice and value of scalar dislocation density are increased. As a result. microhardness of steel surface layers is increased.

Original languageEnglish
Pages (from-to)90-97
Number of pages8
JournalFizika i Khimiya Obrabotki Materialov
Issue number1
Publication statusPublished - 2001

ASJC Scopus subject areas

  • Materials Science(all)

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    Klimenov, V. A., Ivanov, Y. F., Perevalova, O. B., Torgunakov, Y. B., Skugarev, A. I., & Andriets, S. P. (2001). Structure, phase composition and strengthening mechanism of austenitic steel exposed to ultrasonic treatment by pins. Fizika i Khimiya Obrabotki Materialov, (1), 90-97.