Simulation of the process of deformation-induced destruction of long-range order in alloys with an L12 superstructure

Старенченко, В. А.; Pantyukhova, O. D.; Starenchenko, S. V.

doi:10.1134/1.1477505

Cited by 11 publications

(4 citation statements)

References 4 publications

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“…The ordering energy of the Ni 3 Al alloy exceeds that of the other alloys. Calculation data [14] confirm that alloys with the high ordering energy exhibit great stability of the long-range order under plastic deformation.…”

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confidence: 67%

Study of Strain-Induced Change in Structural Characteristics and Long-Range Order in Ni<sub>3</sub>Al Alloy

Starenchenko

Старенченко

2014

AMR

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In this paper the study of structural characteristics of the coarse-crystalline Ni3Al alloy deformed by cold-rolling at a room temperature is presented. The research was carried out by the X-ray methods. It is established that plastic deformation leads to an increase in lattice strain, causes disturbance of a grain structure and order-disorder phase transition. Lowering the long-range order degree of the alloy is accompanied by inhomogeneous decrease in the antiphase domains sizes. Heterogeneity of the order - disorder transformation is connected with strain localization.

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confidence: 67%

Study of Strain-Induced Change in Structural Characteristics and Long-Range Order in Ni<sub>3</sub>Al Alloy

Starenchenko

Старенченко

2014

AMR

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“…The papers [8][9][10] give the formulation of the mathematical model of single crystal alloys creep with L1 2 superstructure, the concept of strengthening and rest being the basis of it [11][12].…”

Section: Modellingmentioning

confidence: 99%

Modelling of creep curves of Ni₃Ge single crystals

Старенченко

Starenchenko

Pantyukhova

et al. 2015

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

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In this paper the creep model of alloys with L1 2 superstructure is presented. The creep model is based on the idea of the mechanisms superposition connected with the different elementary deformation processes. Some of them are incident to the ordered structure L1 2 (anomalous mechanisms), others are typical to pure metals with the fcc structure (normal mechanisms): the accumulation of thermal APBs by means of the intersection of moving dislocations; the formation of APB tubes; the multiplication of superdislocations; the movement of single dislocations; the accumulation of point defects, such as vacancies and interstitial atoms; the accumulation APBs at the climb of edge dislocations. This model takes into account the experimental facts of the wetting antiphase boundaries and emergence of the disordered phase within the ordered phase. The calculations of the creep curves are performed under different conditions. This model describes different kinds of the creep curves and demonstrates the important meaning of the deformation superlocalisation leading to the inverse creep. The experimental and theoretical results coincide rather well.

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“…is the intensity of the APB accumulation caused by the precipitation of the point defects on the edge dislocation [13]:…”

Section: Calculation Of Point Defect Concentration In Model Of Work Hmentioning

confidence: 99%

“…The intensity of the point defect annihilation on the edge dislocations and the intensity of their mutual annihilation in the alloys with the superstructure L1 2 are respectively represented as [13]:…”

Section: Calculation Of Point Defect Concentration In Model Of Work Hmentioning

confidence: 99%

The generation and accumulation of interstitial atoms and vacancies in alloys with L12 superstructure

Pantyukhova¹,

Старенченко²,

Starenchenko³

et al. 2016

AIP Conference Proceedings

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Abstract. The dependences of the point defect concentration (interstitial atoms and vacancies) on the deformation degree were calculated for the L1 2 alloys with the high and low antiphase boundaries (APB) energy in terms of the mathematical model of the work and thermal strengthening of the alloys with the L1 2 structure; the concentration of the point defects generated and annihilated in the process of deformation was estimated. It was found that the main part of the point defects generating during plastic deformation annihilates, the residual density of the deformation point defects does not exceed 10 -5 .

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Simulation of the process of deformation-induced destruction of long-range order in alloys with an L12 superstructure

Cited by 11 publications

References 4 publications

Study of Strain-Induced Change in Structural Characteristics and Long-Range Order in Ni<sub>3</sub>Al Alloy

Study of Strain-Induced Change in Structural Characteristics and Long-Range Order in Ni<sub>3</sub>Al Alloy

Modelling of creep curves of Ni₃Ge single crystals

The generation and accumulation of interstitial atoms and vacancies in alloys with L12 superstructure

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Simulation of the process of deformation-induced destruction of long-range order in alloys with an L12 superstructure

Cited by 11 publications

References 4 publications

Study of Strain-Induced Change in Structural Characteristics and Long-Range Order in Ni<sub>3</sub>Al Alloy

Study of Strain-Induced Change in Structural Characteristics and Long-Range Order in Ni<sub>3</sub>Al Alloy

Modelling of creep curves of Ni3Ge single crystals

The generation and accumulation of interstitial atoms and vacancies in alloys with L12 superstructure

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Modelling of creep curves of Ni₃Ge single crystals