scholarly journals Автоволновое описание пластичности материалов с нестабильной фазовой структурой на макромасштабном уровне

2021 ◽  
Vol 91 (2) ◽  
pp. 267
Author(s):  
В.И. Данилов ◽  
Л.Б. Зуев ◽  
В.В. Горбатенко ◽  
Л.В. Данилова ◽  
Д.В. Орлова
Keyword(s):  
Plastic Deformation ◽  
Digital Image Correlation ◽  
Phase Transformations ◽  
Plastic Flow ◽  
Experimental Analysis ◽  
Titanium Nickelide ◽  
Image Correlation ◽  
Mechanisms Of Formation ◽  
Deformation Processes ◽  
Lüders Bands

The regularities of plastic flow in materials with deformation-induced phase transformations on the example of titanium nickelide and TRIP steel are studied. For experimental analysis of plastic deformation processes, the method of digital image correlation has been used, which allows us to quantitatively describe the behavior of plasticity fronts associated with the course of phase transformations in the materials under study. The mechanisms of formation of Lüders bands and Portevin-Le Chatelier bands at different stages of plastic flow are considered.

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.

The Wavelike Plastic Deformation of Single Crystal Copper

2009 ◽  
Vol 131 (3) ◽  
Author(s):  
Russell J. McDonald ◽  
Christos Efstathiou ◽  
Peter Kurath
Keyword(s):  
Plastic Deformation ◽  
Digital Image Correlation ◽  
Strain Rate ◽  
Single Crystal ◽  
Digital Image ◽  
Surface Deformation ◽  
Image Correlation ◽  
Nominal Strain Rate ◽  
Single Crystal Copper ◽  
Nominal Strain

The purpose of this work is to explore nonuniform plastic flow at small length- and time-scales. Pure single crystal copper tensile specimens were pulled along the [6¯ 5 6] crystal axis at three nominal strain-rates: 0.01%/s, 0.04%/s, and 0.10%/s. Simultaneously, the surface deformation was monitored with in situ digital image correlation over a length-scale of ∼100 μm and a time-scale of 0.07–0.2 s. Sequential digital image correlation strain-rate fields show compelling evidence of a wavelike plastic deformation that is proportional to the nominal strain-rate and decelerates with increasing strain hardening. While a mechanism responsible for the waves is not identified, a methodology correlating observations of multiple researchers is forwarded.

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