The mechanism of nanostructured steel fracture at low temperatures

Lepov, Valeriy; Ivanov, A. M.; Логинов, Б. А.; Беспалов, В. А.; Achikasova, Valentina; Zakirov, R. R.; Логинов, В. Б.

doi:10.1134/s1995078008110116

Cited by 8 publications

(3 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…By the methods of optical and atomic-force microscopy the deformation surfaces of the fractured tension probes was studied. The fracture character changes (from a brittle cleavage to a ductile shear) at low temperatures, it has been shown to be associated, on the one hand, with a fuzzing of grain boundaries during angular pressing with solid structural phases and, on the other hand, by the replacement of the prevalent plastic deformation carriers [13].…”

Section: Resultsmentioning

confidence: 99%

Multiscale modelling of damage and fracture processes in nanomaterials

Lepov¹

2011

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

Abstract. The common multiscale evolution approach to structural modelling of the damage accumulation and fracture processes of submicrocrystalline materials is considered. The method of scanning probe microscopy has been applied to describe the damage evolution on nanoscale. The small-sized plane deformation specimens have been loaded in the tensile device integrated in the scanning probe microscope. The multifractal analysis has been used for the quantitative characterization of in situ deformation of the surface by means of scaling properties. To reveal the mechanism of low-temperature fracture the atomic-force microscopy has been applied to characterize the surface morphology of the stretching deformations of samples fractured at different temperatures.

show abstract

Section: Resultsmentioning

confidence: 99%

Multiscale modelling of damage and fracture processes in nanomaterials

Lepov¹

2011

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

show abstract

“…Structural levels sometimes could match the scale. Figure 4 presents the deformation surface image of low-alloyed steel plane probe near the rupture [14]. The image was obtained by STM and has 5 × 5 m size.…”

Section: Experimental Methodsmentioning

confidence: 99%

Some Aspects of Structural Modeling of Damage Accumulation and Fracture Processes in Metal Structures at Low Temperature

Lepov

Grigoriev

Achikasova

et al. 2016

Modelling and Simulation in Engineering

View full text Add to dashboard Cite

The problem of brittle fracture of structures at low temperature conditions connected to damage accumulation and ductile-brittle transition in metals. The data for locomotive tire contact impact fatigue and spalling are presented. The results of experimental testing showed the impact toughness drop at low temperature. The internal friction method was applied to revealing of the mechanism of dislocation microstructure changes during the low temperature ductile-brittle transition. It has been shown for the first time that the transition is not connected to interatomic interactions but stipulated by thermofluctuation on nucleus such as microcracks and by their further growth and coalescence. From now on, the proposed mechanism would be used for theoretical and numerical modeling of damage accumulation and fracture in materials.

show abstract

“…Поэтому актуальность исследования причин разрушения труб в каждом конкретном случае представляется немаловажной как с точки зрения предотвращения таких аварий для конкретного оборудования и условий эксплуатации, так и для внесения необходимых конструкционных изменений, обеспечивающих в дальнейшем целостность всей системы тепло-снабжения. В институте имеется достаточный опыт исследования разрушения конструкций самыми современными методами [12][13][14].…”

Section: Introductionunclassified

Failure analysis of the material of water boiler pipe operated in the Arctic zone of the Republic of Sakha (Yakutia)

2020

ASNR

View full text Add to dashboard Cite

The mechanism of nanostructured steel fracture at low temperatures

Cited by 8 publications

References 5 publications

Multiscale modelling of damage and fracture processes in nanomaterials

Multiscale modelling of damage and fracture processes in nanomaterials

Some Aspects of Structural Modeling of Damage Accumulation and Fracture Processes in Metal Structures at Low Temperature

Failure analysis of the material of water boiler pipe operated in the Arctic zone of the Republic of Sakha (Yakutia)

Contact Info

Product

Resources

About