scholarly journals Analysis of Plastic Flow Localization in Bimetal Electrolytically Saturated with Hydrogen

2018 ◽  
Vol 7 (2.23) ◽  
pp. 475
Author(s):  
S Barannikova ◽  
Yu. Li ◽  
A Malinovskiy ◽  
L Zuev
Keyword(s):  
Plastic Deformation ◽  
Electrochemical Cell ◽  
Correlation Method ◽  
Image Correlation ◽  
Low Carbon ◽  
Plastic Yielding ◽  
Flow Localization ◽  
Hydrogen Saturation ◽  
Electrolytic Hydrogenation ◽  
Localized Plastic Deformation

Plastic deformation of bimetal compound of austenitic stainless and low-carbon construction steels, resistant to corrosion, is localized through the digital image correlation method upon the uniaxial tension of sample. The evolution of zones of plastic deformation in bimetal is inspected upon the onset of the process and is exposed to hydrogen saturation in a three-electrode electrochemical cell at a controlled constant cathode potential for 6 hours. Localized plastic deformation zones are found to form and evolve during the tension of bimetal samples both at the onset and after 6 hour of the electrolytic hydrogenation throughout the plastic yielding in the primary, protective and transitional layers of the bimetal. The bimetal fracture is initiated by stress concentrated in the bimetal transition layer. Nucleation and propagation of a crack is observed at early work-hardening stages. The fracture of bimetal after hydrogenation is established to be more ductile as compared with precursor.  

Evolution of Macro-Scale Plastic Flow Localization of Tri-Layered Stainless Steel - Low Carbon Steel - Stainless Steel Metal with Digital Image Correlation Method

2016 ◽  
Vol 870 ◽  
pp. 60-65 ◽  
Author(s):  
S.A. Barannikova ◽  
Lev B. Zuev ◽  
A.V. Bochkareva ◽  
A.G. Lunev ◽  
Yu.V. Li ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Stainless Steel ◽  
Carbon Steel ◽  
Digital Image Correlation ◽  
Plastic Flow ◽  
Low Carbon Steel ◽  
Correlation Method ◽  
Image Correlation ◽  
Low Carbon ◽  
Localized Plastic Deformation

Evolution of localized plastic deformation in tri-layered metal material casting consistng of the working part (layer) from austenitic stainless steel and bearing part from low-carbon steel was investigated. The pictures of localization of the plastic flow during the process of uniaxial tension were obtained by means of the digital image correlation method (DIC). Using optical microscopy methods, the changes in the fracture surface were investigated. The deformation diagrams were examined for deformed samples of tri-layered metal. These were found to show all the plastic flow stages: the linear, parabolic and pre-failure stages would occur for the respective values of the exponent n from the Lüdwik-Holomon equation. The analysis of the plastic flow stages and localized plastic deformation parameters was performed.

Study of Plastic Flow of Aluminum Alloy Using Digital Speckle Photography

2016 ◽  
Vol 683 ◽  
pp. 118-124
Author(s):  
Anna V. Bochkareva ◽  
Aleksey G. Lunev ◽  
Svetlana A. Barannikova ◽  
Lev Zuev
Keyword(s):  
Plastic Deformation ◽  
Aluminum Alloy ◽  
Hydrogen Embrittlement ◽  
Plastic Flow ◽  
Flow Behavior ◽  
Local Strain ◽  
Image Technique ◽  
Electrolytic Hydrogenation ◽  
Digital Speckle ◽  
Localized Plastic Deformation

The effect of hydrogen embrittlement on the localized plastic deformation of aluminum alloy D1 was investigated. The studies were performed for the test samples of aluminum alloy subjected to electrolytic hydrogenation. It is found that the mechanical properties and localized plastic deformation parameters of aluminum alloy are affected adversely by hydrogen embrittlement. The hydrogenated counterpart of alloy has a lower degree of ductility relative to the original alloy; however, the plastic flow behavior of material remains virtually unaffected. The deformation diagrams were examined for the deformed samples of aluminum alloy. These are found to show all the plastic flow stages: the linear, parabolic and pre-failure stages would occur for the respective values of the exponent n from the Ludwik-Holomon equation. Using digital speckle image technique, the local strain patterns were being registered for the original alloy D1 and the counterpart subjected to electrolytic hydrogenation for 100 h.

Effect of Hydrogen on Plastic Strain Localization of Construction Steels

2014 ◽  
Vol 880 ◽  
pp. 42-47 ◽  
Author(s):  
Svetlana A. Barannikova ◽  
Aleksey G. Lunev ◽  
Mikhail V. Nadezhkin ◽  
Lev B. Zuev
Keyword(s):  
Plastic Strain ◽  
Strain Localization ◽  
Electrochemical Cell ◽  
Carbon Steels ◽  
Low Carbon ◽  
Flow Localization ◽  
Hydrogen Atoms ◽  
Double Exposure ◽  
Plastic Strain Localization ◽  
Deformation Hardening

The effect of interstitial hydrogen atoms on the mechanical properties and plastic strain localization patterns in tensile tested specimens of austenitic stainless and low-carbon steels have been studied using a double exposure speckle photography technique. The main parameters of plastic flow localization at various stages of the deformation hardening have been determined in steels electrolytically saturated with hydrogen in a three electrode electrochemical cell at a controlled constant cathode potential.

Plastic Deformation Localization of Low Carbon Steel: Hydrogen Effect

2014 ◽  
Vol 1013 ◽  
pp. 77-83 ◽  
Author(s):  
Svetlana Barannikova ◽  
Yurii F. Ivanov ◽  
Dmitriy Kosinov ◽  
Sergey Konovalov ◽  
Оksana Stolboushkina ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Low Carbon Steel ◽  
Hydrogen Effect ◽  
Low Carbon ◽  
Flow Localization ◽  
Double Exposure ◽  
Deformation Localization ◽  
Hydrogen Saturation ◽  
Defect Substructure ◽  
Electrolytic Hydrogen

In the present study, the features of plastic strain localization and structure of polycrystalline low carbon steelFe-0.07%Cwere investigated after hot rolling and electrolytic hydrogen saturation. The method of double-exposure speckle photographyhave been used for identification of main types and parameters of plastic flow localization at different stages of strain hardening.Shown the effect of hydrogen on changing of defect substructure and cementite morphology by using optical and electron microscopy.

Study of the Elasto-Plastic Deformation of the Steel/Steel Adhesive Joint Using Digital Image Correlation Method

2020 ◽  
Vol 303 ◽  
pp. 143-160
Author(s):  
Artem M. Ustinov ◽  
Anatoliy A. Klopotov ◽  
A.I. Potekaev ◽  
S.B. Galsanov ◽  
Yu.A. Abzaev ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Digital Image Correlation ◽  
Digital Image ◽  
Adhesive Joint ◽  
Steel Surface ◽  
Correlation Method ◽  
Deformation Curve ◽  
Image Correlation ◽  
Digital Image Correlation Method

The study of the steel/steel adhesive joint using digital image correlation method has been carried out. A correlation between the evolution of distributions of deformation regions on the surface of the adhesive joint and the stages on the deformation curve is revealed. It has been found that a destruction along the adhesive seam begins when the adhesive joint reaches total deformations of about 0.5%. The analysis of deformation fields on the steel surface have allowed revealing the formation of extensive tension regions with greatest deformations at the interface of loaded plates. An increase in the values of compression deformations at the ends of the patch and a significant increase in the areas of these regions have been revealed.

scholarly journals Kinetics of Plastic Deformation Localization Bands in Polycrystalline Nickel

Metals ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1440
Author(s):  
Svetlana A. Barannikova ◽  
Mikhail V. Nadezhkin
Keyword(s):  
Plastic Deformation ◽  
Constant Strain Rate ◽  
Correlation Method ◽  
Deformation Bands ◽  
Total Deformation ◽  
Polycrystalline Nickel ◽  
Deformation Localization ◽  
Jerky Flow ◽  
Time Period ◽  
Localized Plastic Deformation

Jerky flow has recently aroused interest as an example of complex spatiotemporal dynamics resulting from the collective behavior of defects in Al- and Mg-based alloys under loading. This paper presents the results of the study of the macroscopic strain localization kinetics in Nickel 200 (99.5 wt % purity). Uniaxial tension of flat samples is monitored at room temperature in the load–unload mode at a constant strain rate and total deformation increment up to 5%. The stress–strain curves reveal jerky flow from the yield point to the formation of the neck. The digital speckle correlation method evidences the movement of localized plastic deformation bands under the conditions of the Portevin–Le Chatelier effect (PLC). It is shown that stress drops during jerky flow in Ni are accompanied by the formation of morphologically simple single PLC bands. It is established that, with an increase in total deformation, the number of PLC bands and their velocity of motion along the sample decrease, while their time period increases. Moreover, an increase in total deformation leads to an increase in the parameters of the force response (i.e., time period and stress drop magnitude). It is found that the criterion of damage for PLC bands as a function of the total strain has a sigmoidal shape.

Sign in / Sign up

Export Citation Format

Share Document