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

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 language	English
Pages (from-to)	90-97
Number of pages	8
Journal	Fizika i Khimiya Obrabotki Materialov
Issue number	1
Publication status	Published - 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.

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

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.",

author = "Klimenov, {V. A.} and Ivanov, {Yu F.} and Perevalova, {O. B.} and Torgunakov, {Yu B.} and Skugarev, {A. I.} and Andriets, {S. P.}",

year = "2001",

language = "English",

pages = "90--97",

journal = "Fizika i Khimiya Obrabotki Materialov",

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T1 - Structure, phase composition and strengthening mechanism of austenitic steel exposed to ultrasonic treatment by pins

AU - Klimenov, V. A.

AU - Ivanov, Yu F.

AU - Perevalova, O. B.

AU - Torgunakov, Yu B.

AU - Skugarev, A. I.

AU - Andriets, S. P.

PY - 2001

Y1 - 2001

N2 - 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.

AB - 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.

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