Structure and properties of low-alloy Cr-Mo-V steel after austenitization in the intercritical temperature range

Stepanov, A. I.; Ashikhmina, I. N.; Сергеева, К. И.; Беликов, С.; Musikhin, S. A.; Карабаналов, М. С.; Al-Katawi, A. A.

doi:10.3103/s0967091214060151

Cited by 9 publications

(5 citation statements)

References 7 publications

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“…This spectrum resulted from austenite transformation by shear mechanism according to orientation relationships, intermediate between K-S OR and N-W OR, in accordance with [15]. Such special boundary spectra were also detected in martensite of low-carbon tube steel [16]. Detailed examination of CSL boundary areas showed that Σ3 boundary is mainly fixed between parallel laths of one package (Fig.…”

Section: Resultsmentioning

confidence: 59%

Effect of Grain Boundaries Type on Carbides Precipitates in Tempered Martensite

Пастухов

Khvostov

Лобанов

2019

MSF

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Different types of carbide phases and regions of their precipitation in tempered martensite of austenitic steel have been investigated with orientation microscopy (EBSD) and electron microprobe analysis. The steel structure consisted of large grains of high-temperature ferrite (~ 15%), without visible mesostructured, and martensite packages with a great number of low-angle boundaries. High-angle boundary spectrum with the most prominent coincidence site lattice (CSL) boundaries, Σ3, Σ11, Σ25b, Σ33с Σ41с, is typical for martensite. This spectrum, resulted from austenite transformation by shear mechanism according to orientation relationships (OR), intermediate between Kurdjumov-Sachs (K-S) and Nishiyama-Wassermann (N-W). In the structure two types of carbide precipitates were observed: large MC [~ NbC] along the boundaries of former austenite grains, and dispersed M23C6 [~ (W,Mo)2(Cr,Fe)21C6] predominantly along the boundaries in martensite packages. It has been shown that under martensite tempering M23C6 precipitation was mainly at high-angle intergranular boundaries. Carbide almost did not precipitate at low-angle and special CSL Σ3 boundaries. A few carbides were detected at special CSL boundaries, Σ11, Σ25b, Σ33с Σ41с.

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Section: Resultsmentioning

confidence: 59%

Effect of Grain Boundaries Type on Carbides Precipitates in Tempered Martensite

Пастухов

Khvostov

Лобанов

2019

MSF

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“…1, e, Nishiyama-Wasserman types, as shown in [11]. Such spectra of special boundaries are also seen in the martensite of low-carbon pipe steel [12,13].…”

Section: Resultsmentioning

confidence: 78%

Effect of Structure and Texture on Failure of Pipe Steel Sheets produced by TMCP

Лобанов¹,

Данилов²,

Пастухов³

et al. 2019

KEG

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“…In paper [21] it was shown that this spectrum results from martensite phase transformation according to orientation relationships intermediate between K-S and N-W. Such CSL boundary spectra were also registered in both martensite and bainite of low-carbon tube steels [19,22]. Analysis of crystallographic interaction between α-phase crystallites and neighbouring austenite grains (Fig.…”

Section: Resultsmentioning

confidence: 88%

Crystallographic Peculiarities of Shear α-γ Transformation in Austenitic Stainless Steel in the High Temperature Area

Пастухов

Козлов

Лобанов

2018

SSP

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Structure-texture states in 18Cr-9Ni austenitic stainless steel after long-term operation of the tube at high temperatures and neutron irradiation have been investigated with orientation microscopy (EBSD). In the examined samples, cut out at the external surface, a significant concentration of α-phase with the lattice close to bcc has been detected. Phase transformation shows prominent crystallographic direction, caused by initial orientation of austenite grains and tensile stress effect, normally directed at a tangent to its external surface. High-angle boundary spectrum with the most prominent coincidence site lattice (CSL) boundaries, Σ3, Σ11, Σ25b, Σ33с Σ41с, is typical for α-phase. Thus, it can be claimed that austenite transformation was carried out by shear (bainite, taking into account high temperature) mechanism, according to orientation relationships (OR), intermediate between Kurdjumov-Sachs (K-S) and Nishiyama-Wassermann (N-W). Shear γ-α transformation began in austenite on twin boundaries (CSL Σ3), and was carried out in the range determined by initial orientation of γ-phase crystals and effective stress value. Based on high density of CSL boundaries Σ3 in α-phase it has been suggested that its nuclei are represented not by single crystallites, but crystallite couples in twin misorientation.

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Structure and properties of low-alloy Cr-Mo-V steel after austenitization in the intercritical temperature range

Cited by 9 publications

References 7 publications

Effect of Grain Boundaries Type on Carbides Precipitates in Tempered Martensite

Effect of Grain Boundaries Type on Carbides Precipitates in Tempered Martensite

Effect of Structure and Texture on Failure of Pipe Steel Sheets produced by TMCP

Crystallographic Peculiarities of Shear α-γ Transformation in Austenitic Stainless Steel in the High Temperature Area

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