Development of the rotational mode of plastic deformation upon drawing of pearlitic steels of various alloying systems

Tereshchenko, N. A.; Yakovleva, I. L.; Chukin, M. V.; Efimova, Yu. Yu.

doi:10.1134/s0031918x15030151

Cited by 5 publications

(5 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In general case, destruction of steel with pearlite structure can start both from a micro-crack, appearing during cutting of cementite plate, and a crack, originating on the boundaries of the colonies. The model [19] describing destruction ofplate pearlite via the micro-shearing distortion mechanism shows [19,20] that the value of destruction stress for heterogeneous crack origination (variant 1) is determined by thickness of cementite plate: V = 0.78 t -1/2 . Stress of brittle destruction on the boundary of pearlite colony depends on its size: V = 0.18П -1/2 .…”

Section: Discussion Of the Resultsmentioning

confidence: 99%

“…Stress of brittle destruction on the boundary of pearlite colony depends on its size: V = 0.18П -1/2 . The authors of [20] think that the value of destruction stress is stipulated by selection between two structural factors as a result of competition of two mecha- x: 14 μm nisms: the question is, which of these two factors (a colony or a cementite plate) will provide larger crack. Critical relationship between the size of pearlite colonies and thickness of cementite plate, providing equal possibil-ity of destruction from both sources, is determined be the expression d p /t c = 550.…”

Section: Discussion Of the Resultsmentioning

confidence: 99%

“…Critical relationship between the size of pearlite colonies and thickness of cementite plate, providing equal possibil-ity of destruction from both sources, is determined be the expression d p /t c = 550. We executed calculations according to a.m. formulas and stand the results in the operating timetable [20]. Influence of the relationships between the size of pearlite colonies d p and thickness of cementite plates tc on destruction stress of HAZ metal of welded joint is displayed on the Fig.…”

Section: Discussion Of the Resultsmentioning

confidence: 99%

“…According to description of the model presented in the work [20], the area I on the Fig. 6 corresponds to structures, where cementite plates are the sources of micro-cracks.…”

Section: Discussion Of the Resultsmentioning

confidence: 99%

See 3 more Smart Citations

Determination of rail steel structural elements via the method of atomic force microscopy

Balanovskiy¹,

Shtaiger²,

Kondratyev³

et al. 2022

cisisr

View full text Add to dashboard Cite

The distance between pearlite plates is an important parameter for control of ductility and deformation strengthening of carbon steels. Most methods of optical end electronic microscopy for measuring the distances between cementite and pearlite plates in pearlite steels make definite complications when applying to high-dispersed microstructures. At present time rail steels with pearlite structure are fabricated with interlamellar distance 60-130 nm. This research used atomic force microscopy (AFM) for measuring interlamellar distances of pearlite structure in the heat-affected zone (HAZ) of rail welded joint. Qualitative evaluation of cementite and ferrite plates thickness was obtained for the first time, depending on location relating to a rail weld fusion line. The input of cementite plates in strength on the base of Hall-Petch equation was considered. Influence of the relationship between the size of pearlite colonies d p and thickness of cementite plates t c on metal destruction stress of a HAZ welded joint was assessed.

show abstract

Section: Discussion Of the Resultsmentioning

confidence: 99%

Section: Discussion Of the Resultsmentioning

confidence: 99%

Section: Discussion Of the Resultsmentioning

confidence: 99%

“…According to description of the model presented in the work [20], the area I on the Fig. 6 corresponds to structures, where cementite plates are the sources of micro-cracks.…”

Section: Discussion Of the Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Determination of rail steel structural elements via the method of atomic force microscopy

Balanovskiy¹,

Shtaiger²,

Kondratyev³

et al. 2022

cisisr

View full text Add to dashboard Cite

show abstract

“…Видно, что РКУП при 20 С приводит к трехкратному увеличению пределов текучести и прочности, однако резко уменьшает пластичность стали. Такие высокие прочностные свойства связаны как с существенным уменьшением среднего размера структурных элементов, так и с созданием высоких внутренних напряжений в процессе РКУП [16]. Происходит практически полное разрушение перлитных колоний и сфероидизация пластин цементита, подобное явление при холодной деформации с большой степенью наблюдалось в разных работах, например в [14].…”

Section: экспериментальные результаты и обсуждениеunclassified

Special features of the formation of the microstructure of the 09G2S steel under conditions of cold and warm equal-channel angular pressing

Макаров¹,

Yakovleva²,

Волкова³

et al. 2016

DREAM

View full text Add to dashboard Cite

Translucent electron microscopy is used to make a comparative analysis of the microstructure of the 09G2S steel in the initial state, after equal-channel angular pressing (ECAP) at 20 C and after warm ECAP at 450 C. The effect of ECAP at 20 C leads to the formation of a mixed (subgranular and cellular) ferrite structure and the destruction of pearlite colonies. There occur the crushing and spheroidization of cementite particles. Warm ECAP deformation at 450 C contributes to the formation of a polygonized structure with submicron scale elements in ferrite. In the main, the pearlite colonies undergo insignificant changes, and there are individual sections with destroyed pearlite colonies and severe dispersion of cementite. The mechanical properties of the steel in three examined structural states are presented. Gleiter H. Nanostructured materials: basic concepts and microstructure. Acta Materialia, 2000, vol. 48, iss. 1, pp. 1-29. DOI: 10.1016 (99) Makarov A.V., Savrai R.A., Gorkunov E.S., Yurovskikh A.S., Malygina I.Yu., Davydova N.A. Structure, mechanical characteristics, and deformation and fractures of quenched structural steel under static and cyclic loading after combined strain-heat nanostructuring treatment.

show abstract

Tribological Fracture of Ferritic-Pearlitic Steel with Nano and Submicron Structure during Sliding Friction

Yakovleva

Makharova

Mordovskoy

2021

IOP Conf. Ser.: Mater. Sci. Eng.

View full text Add to dashboard Cite

An urgent task of tribology is to study the wear mechanisms of various materials for the development of stable wear-resistant microstructures and optimal modes of their production. The purpose of this work is to assess the wear resistance of low-alloy steel with a submicrocrystalline ferritic matrix, reinforced with nano- and microspheres of cementite, as well as to reveal the features of its destruction by friction based on the analysis of friction surfaces. Steel nanostructuring was carried out using cold (at room temperature) equal-channel angular pressing and subsequent annealing. The process of steel wear in coarse-grained and nanosubmicron states has been studied at various stages of tribological loading under sliding friction conditions using optical and scanning electron microscopy, profilometry, and analysis of changes in the roughness parameters of friction surfaces. It is shown that the formation in steel of a heterogeneous structure “submicron ferrite matrix - nanoscale carbide phase” provided an increase in wear resistance by more than two times. The features of contact fracture are revealed, which determine the increase in the wear resistance of steel upon refining the structure and indicate significant differences in the nature of the metal tribological strength formation, depending on the level of dispersion of microstructural elements. The results obtained can be used in the development of technological processes for the formation of nanoscale structural components and improving the properties of traditional low-alloy steels.

show abstract

Development of the rotational mode of plastic deformation upon drawing of pearlitic steels of various alloying systems

Cited by 5 publications

References 6 publications

Determination of rail steel structural elements via the method of atomic force microscopy

Determination of rail steel structural elements via the method of atomic force microscopy

Special features of the formation of the microstructure of the 09G2S steel under conditions of cold and warm equal-channel angular pressing

Tribological Fracture of Ferritic-Pearlitic Steel with Nano and Submicron Structure during Sliding Friction

Contact Info

Product

Resources

About