Piecewise Model with Two Overlapped Stages for the Structure Formation and Hardening Upon Severe Plastic Deformation in Iron

2020 ◽  
Author(s):  
E. F. Talantsev ◽  
M. V. Degtyarev ◽  
T. I. Chashchukhina ◽  
L. M. Voronova ◽  
V. P. Pilyugin
Keyword(s):  
Plastic Deformation ◽  
Severe Plastic Deformation ◽  
Structure Formation ◽  
Piecewise Model

Gradient Structure Formation by Severe Plastic Deformation

2006 ◽  
pp. 787-792
Author(s):  
M. Danylenko ◽  
V. Gorban ◽  
Yu.N. Podrezov ◽  
S.A. Firstov ◽  
O. Rosenberg ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Severe Plastic Deformation ◽  
Structure Formation ◽  
Gradient Structure

Nanocrystalline structure formation in Al-Mg-Sc alloys during severe plastic deformation

2006 ◽  
Vol 2006 (6) ◽  
pp. 533-540 ◽  
Author(s):  
S. V. Dobatkin ◽  
V. V. Zakharov ◽  
A. Yu. Vinogradov ◽  
K. Kitagawa ◽  
N. A. Krasil’nikov ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Severe Plastic Deformation ◽  
Structure Formation ◽  
Nanocrystalline Structure

scholarly journals Influence of special features of the gradient structure formation during severe plastic deformation of alloys with different types of a crystalline lattice

2019 ◽  
Vol 17 (1) ◽  
pp. 64-75 ◽  
Author(s):  
Georgy I. Raab ◽  
Ilyas S. Kodirov ◽  
Gennady N. Aleshin ◽  
Arseniy G. Raab ◽  
Nikolai K. Tsenev
Keyword(s):  
Mechanical Properties ◽  
Plastic Deformation ◽  
High Pressure ◽  
Severe Plastic Deformation ◽  
Structure Formation ◽  
High Pressure Torsion ◽  
Crystalline Lattice ◽  
Gradient Structure ◽  
Temperature Range ◽  
Deformation Treatment

Problem Statement (Relevance): The paper describes some features and prospective benefits of deformation by methods of drawing with shear (SD) and high pressure torsion (HPT) in a temperature range of dynamic strain aging (DSA) effect, which allow receiving a high complex of physical and mechanical properties. Objectives: The study aims to investigate and analyze features of the structure formation with the combined application of severe plastic deformation (SPD) and the DSA effect during deformation by drawing with shear and high pressure torsion, to establish patterns of the gradient structure formation. Methods Applied: 1. Computer simulation in Deform 3D software to investigate the stress-strain state on materials with various types of a crystalline lattice: copper grade M1 (FCC), Steel 10 (BCC) and titanium VT1-0 (HCP) and a further comparison with experimental results. 2. Microhardness measurement 3. Scanning and transmission electron microscopy. Originality: This research resulted in investigation of the combined effect of the DSA effect and SPD on the gradient structure formation and mechanical properties of metals with various crystalline lattices. Findings: the paper presents the results of the study of the structure formation during non-monotonous plastic deformation of the alloys (steel 10, copper and titanium) with various crystalline lattice types by SD, as well as ECAP and HPT of low-carbon steel in the temperature range of the DSA effect. Deformation mechanisms and features of the deformation behavior on a mesoscopic scale under various deformation treatment modes are analyzed. The temperature range of the DSA effect in steel 10 under ECAP and the fact of the gradient structure formation under HPT are established. Practical Relevance: The study helped to obtain data that can be used to choose the optimal deformation treatment mode with the DSA effect.

scholarly journals An Empirical Model of Submicrocrystalline Structure Formation and Hardening upon Severe Plastic Deformation in Iron

2020 ◽  
Author(s):  
Mikhail I. Degtyarev ◽  
Tatiana I. Chashchukhina ◽  
Lyudmila M. Voronova ◽  
Alexander M. Patselov ◽  
Vitaliy P. Pilyugin ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Severe Plastic Deformation ◽  
Pure Iron ◽  
Nano Structure ◽  
Material Hardness ◽  
Tem Microscopy ◽  
Physical Effects ◽  
Piecewise Model ◽  
Fitting Parameters ◽  
Good Agreement

The evolution of metals micro/nano-structure upon severe plastic deformation (SPD) is still far to be theoretically explained, while experimental datasets are persistently growing for several decades. Major problem associated with understanding of SPD is related to a fact that the latter is a synergetic product of several competing physical effects which alter the material micro/nano-structure. In attempt to find deformational boundaries, where predominantly one mechanism determines the micro/nano-structure, in this paper we propose a continuous piecewise model for the analysis of experiments on material hardness vs strain of SPD processed materials. The novelty of this approach lies in its ability to find, as free-fitting parameters, the strain breakpoints which separate different micro/nano-structure modes generated upon SPD process. The model is applied to analyse experimental data for polycrystalline samples of pure iron and two distinctive strain breakpoints are revealed with good accuracies. This finding is in a good agreement with our earlier results on TEM microscopy studies on pure iron polycrystals after SPD treatment.

The mechanism of nanocrystalline structure formation in Ni3Al during severe plastic deformation

2001 ◽  
Vol 49 (4) ◽  
pp. 663-671 ◽  
Author(s):  
A.V. Korznikov ◽  
G. Tram ◽  
O. Dimitrov ◽  
G.F. Korznikova ◽  
S.R. Idrisova ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Severe Plastic Deformation ◽  
Structure Formation ◽  
Nanocrystalline Structure

The nanocrystalline structure formation in germanium subjected to severe plastic deformation

1994 ◽  
Vol 4 (4) ◽  
pp. 387-395 ◽  
Author(s):  
R.K. Islamgaliev ◽  
F. Chmelik ◽  
I.F. Gibadullin ◽  
W. Biegel ◽  
R.Z. Valiev
Keyword(s):  
Plastic Deformation ◽  
Severe Plastic Deformation ◽  
Structure Formation ◽  
Nanocrystalline Structure
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