Alexander Vadimovich Polyakov

Dr. Alexander Vadimovich Polyakov

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Research Focus & Metrics

Academic Career Length

18Years (2009-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 February 2013 in Materials Science and Engineering: A
Verified
Journal Article
Open access
DGD.V. Gunderov
D.V. Gunderov
APAlexander Vadimovich Polyakov
Alexander Vadimovich Polyakov
ISI.P. Semenova
I.P. Semenova
GRG.I. Raab
G.I. Raab
Anna ChurakovaAnna Churakova
Anna Churakova
RVR.Z. Valiev
R.Z. Valiev
Long-length ultrafine-grained (UFG) Ti rods are produced by equal-channel angular pressing via the conform scheme (ECAP-C) at 200 °C, which is followed by drawing at 200 °C. The evolution of microstructure, macrotexture, and mechanical properties (yield strength, ultimate tensile strength, failure stress, uniform elongation, elongation to failure) of pure Ti during this thermo-mechanical processing is studied. Special attention is also paid to the effect of microstructure on the mechanical behavior of the material after macrolocalization of plastic flow. The number of ECAP-C passes varies in the range of 1–10. The microstructure is more refined with increasing number of ECAP-C passes. Formation of homogeneous microstructure with a grain/subgrain size of 200 nm and its saturation after 6 ECAP-C passes are observed. Strength properties increase with increasing number of ECAP passes and saturate after 6 ECAP-C passes to a yield strength of 973 MPa, an ultimate tensile strength of 1035 MPa, and a true failure stress of 1400 MPa (from 625, 750, and 1150 MPa in the as-received condition). The true strain at failure failure decreases after ECAP-C processing. The reduction of area and true strain to failure values do not decrease after ECAP-C processing. The sample after 6 ECAP-C passes is subjected to drawing at 200¯C resulting in reduction of a grain/subgrain size to 150 nm, formation of (10 1¯0) fiber texture with respect to the rod axis, and further increase of the yield strength up to 1190 MPa, the ultimate tensile strength up to 1230 MPa and the true failure stress up to 1600 MPa. It is demonstrated that UFG CP Ti has low resistance to macrolocalization of plastic deformation and high resistance to crack formation after necking

6 July 2012 in Journal of Materials Science
Verified
Journal Article
Closed access
PDF file
Irina SemenovaIrina Semenova
Irina Semenova
APAlexander Vadimovich Polyakov
Alexander Vadimovich Polyakov
GRG. I. Raab
G. I. Raab
TLT. C. Lowe
T. C. Lowe
RVR. Z. Valiev
R. Z. Valiev

1 February 2018 in Materials Science and Engineering: A
Verified
Journal Article
Closed access
ISIrina P. Semenova
Irina P. Semenova
JMJulia M. Modina
Julia M. Modina
APAlexander Vadimovich Polyakov
Alexander Vadimovich Polyakov
GKGennady V. Klevtsov
Gennady V. Klevtsov
NKNataly A. Klevtsova
Nataly A. Klevtsova
TLTerence G. Langdon
Terence G. Langdon

4 April 2016 in Advanced Engineering Materials
Verified
Journal Article
Closed access
PDF file
ISIrina P. Semenova
Irina P. Semenova
APAlexander Vadimovich Polyakov
Alexander Vadimovich Polyakov
VPVeronika V. Polyakova
Veronika V. Polyakova
Yi HuangYi Huang
Yi Huang
Ruslan ValievRuslan Valiev
Ruslan Valiev
TLTerence G. Langdon
Terence G. Langdon

27 November 2012 in Journal of Biomedical Materials Research Part A
Verified
Journal Article
Closed access
PDF file
FNF. L. Nie
F. L. Nie
Yufeng ZhengYufeng Zheng
Yufeng Zheng
SWShicheng Wei
Shicheng Wei
DWD. S. Wang
D. S. Wang
ZYZ. T. Yu
Z. T. Yu
Ruslan ValievRuslan Valiev
Ruslan Valiev

1 June 2017 in Materials Science and Engineering: A
Verified
Journal Article
Closed access
ISI.P. Semenova
I.P. Semenova
APAlexander Vadimovich Polyakov
Alexander Vadimovich Polyakov
VPV.V. Polyakova
V.V. Polyakova
YGYu.F. Grishina
Yu.F. Grishina
Yi HuangYi Huang
Yi Huang
TLT.G. Langdon
T.G. Langdon