Quasi-Particle Approach to the Autowave Physics of Metal Plasticity

Зуев, Л. Б.; Баранникова, С. А.

doi:10.3390/met10111446

Cited by 5 publications

(12 citation statements)

References 34 publications

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“…The above considerations point to the existence of a relationship between the plasticity parameter (λ•V aw ) and the lattice properties. Moreover, the appearance of Planck's constant, h, in Equation ( 13), together with typical mechanical characteristics, confirms the appropriateness of the use of quantum mechanical ideas in plasticity physics, as was proposed by us in [15,21].…”

Section: Discussionsupporting

confidence: 68%

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Plasticity Autowave Characteristics of Metals and the Periodic Table of Elements

Зуев

2021

Metals

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In this paper, the general laws of localized plastic flow development are described for the linear work hardening stages of nineteen metals. The correlations are established and discussed between their element position in the periodic table of elements and the parameters of the autowave process of localized plastic flow in these elements. Patterns of plastic flow are considered for nineteen metals from the 3rd, 4th, 5th, and 6th periods of the periodic table of elements. A conditional characteristic of plasticity is introduced and its relationship with the position of the metals in the periodic table of elements is established. Correlations between the plastic properties and other metal characteristics were analyzed. Some quantitative models are proposed for explaining the observed dependency origin by the drag of moving dislocation by electron gas in metal crystals. Observed correlations indicate the existence of a close bond between localized plastic flow in deforming medium with the lattice characteristics of the elements and their electron structures.

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Section: Discussionsupporting

confidence: 68%

“…Then, it follows from Figure 4a, that m ef ~n. This fact was found earlier [14,15], where the effective mass was related to a quasi-particle associated with the localized plastic flow autowave and named autolocalizon.…”

Section: Discussionsupporting

confidence: 62%

Plasticity Autowave Characteristics of Metals and the Periodic Table of Elements

Зуев

2021

Metals

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“…Использование двуэкспозиционной спекл-фотографии, телевизионных методов регистрации и анализа спекл-структуры изображений деформируемых объектов весьма перспективно при исследованиях особенностей пластической деформации материалов [17][18][19], в особенности на макроскопическом масштабном уровне. В пользу этого мнения свидетельствует большое количество работ [22][23][24], в которых эта или подобная техника применялись для решения таких проблем [25][26][27].…”

Section: материал и методика исследованияunclassified

Study of deformation structures maps in metals under tension

Баранникова

Iskhakova

2022

PNRPU Mechanics Bulletin

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The paper considers the regularities of macroscopic inhomogeneity of plastic flow during uniaxial tension of flat samples of Fe-Cr-Ni 2 mm thick. Their tension axis was oriented along the rolling direction. The average grain size was 12.5 ± 3 mm. The plastic flow curves of the alloy had long stages of linear strain hardening over the entire test temperature range 180 K < T < 297 K. For the experimental study of plastic deformation, we used the method of accurately reconstructing the fields of displacement vectors and calculating the components of the plastic distortion tensor using speckle photography with increments of the total strain between exposures 0.001. The field of displacement vectors as a whole over the sample during loading is inhomogeneous both in the directions of the displacement vectors and in values; in some areas, the displacement vectors nonmonotonically change directions relative to the tension axis. It has been established that in the test temperature range 180 K < T < 297 K, plastic flow is localized at all stages of the process. The appearance of the a′-martensite phase during the deformation of the alloy under study leads to a change in the mechanical characteristics, the work hardening coefficient, and the deformation localization parameters. The maps of deformation structures are analyzed in the form of spatial distributions of the components of the plastic distortion tensor: local elongations, narrowings, shifts and rotations. The non-linear nature of the change in the coefficient of transverse deformation from the level of acting stresses is established. The general form and quantitative parameters of the evolution of the components of the plastic distortion tensor indicate the connection of this process with the self-organization of a defective subsystem in a deformable medium.

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“…It is known that the macroscopic localization of plastic flow has an autowave behavior, and the type of autowave is determined by the strain hardening law [1,2]. Thus, at the stage of linear work hardening, a system of equidistant localization foci moves at a constant speed, that is, a phase autowave.…”

Section: Introductionmentioning

confidence: 99%

Autowave Criteria of Fracture and Plastic Strain Localization of Zirconium Alloys

Зуев

Баранникова

Орлова

2022

Metals

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Plastic deformation and fracture of Zr–1% Nb alloys exposed to quasi-static tensile testing have been studied via a joint analysis of stress-strain curves, ultrasound velocity and double-exposure speckle photographs. The possibilities of ductility evaluation through the εxx strain distribution in thin-walled parts of zirconium alloys are shown in this paper. The stress-strain state of zirconium alloys in a cold rolling site is investigated considering the development of localized deformation bands and changes in ultrasound velocity. It is established that the transition from the upsetting to the reduction region is accompanied by the significant exhaustion of the plasticity margin of the material; therefore, the latter is more prone to fracture in this zone exactly. It is shown that traditional methods estimating the plasticity margin from the mechanical properties cannot reveal this region, requiring a comprehensive study of macroscopically localized plastic strain in combination with acoustic measurements. In particular, the multi-pass cold rolling of Zr alloys includes various localized deformation processes that can result in the formation of localized plasticity autowaves. Recommendations for strain distribution division over the deformation zone length in the alloy in the pilger roll grooves are provided as well.

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Quasi-Particle Approach to the Autowave Physics of Metal Plasticity

Cited by 5 publications

References 34 publications

Plasticity Autowave Characteristics of Metals and the Periodic Table of Elements

Plasticity Autowave Characteristics of Metals and the Periodic Table of Elements

Study of deformation structures maps in metals under tension

Autowave Criteria of Fracture and Plastic Strain Localization of Zirconium Alloys

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