Volume 11, Issue 4s, December 2021

Special Issue “International Conference on the Physics and Technology of Advanced Materials: Selected Papers”

Preface

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The International Conference on the Physics and Technology of Advanced Materials (PTAM-2021) was held in Ufa, Russia, from October 5 till October 8, 2021. The conference worked in a combined format including face-to-face meetings and online sessions and gathered in total 151 researchers and students from different countries and towns of Russia working on various topical areas of the science and technology of materials. PTAM-2021 was organized for the first time by the Institute for Metals Superplasticity Problems of the Russian Academy of Sciences in cooperation with Bashkir State University and Ufa State Petroleum Technological University.
We are proud that Letters on Materials served as an information partner of PTAM-2021 that significantly enhanced the international character of the conference. Presented in this Special Issue are selected papers reported at PTAM-2021. All papers included here have passed the normal peer review and edition procedure accepted in the Journal.

Editor-in-Chief,
Radik R. Mulyukov
Superplastic forming of Ti-6Al-4V commercial sheet with non-homogeneous initial microstructure (d=0.3-25 micrometers) at rather low temperature of 700C with a constant argon gas pressure of 2.5 MPa was performed for the first time. Superplastic forming of Ti-6Al-4V sheet at 700C led to an improvement of microstructure homogeneity and randomization of the rolling texture.

Microstructure of commercial sheet out of Ti-6Al-4V alloy after superplastic forming at 700°C

Superplastic forming of Ti-6Al-4V commercial sheet with non-homogeneous initial microstructure (d=0.3-25 micrometers) at rather low temperature of 700C with a constant argon gas pressure of 2.5 MPa was performed for the first time. Superplastic forming of Ti-6Al-4V sheet at 700C led to an improvement of microstructure homogeneity and randomization of the rolling texture.
M.R. Shagiev, M.A. Murzinova
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Year: 2021 Volume: 11     Issue: 4s Pages: 553-556
Journal section: Structure design and analysis
The force change depending on the deflection during DWTT Curve No. 2 - the notch is perpendicular to the direction of vibration (WD); Curve No. 3 - the notch is parallel to the direction of vibration (WD). A characteristic feature of the deformation diagrams for specimens with the parallel notch is the presence of two local maxima. This contrasts with the force change curve for the perpendicular notch specimens.

Anisotropy of impact toughness of Ti-6Al-4V alloy joints processed by linear friction welding

The force change depending on the deflection during DWTT Curve No. 2 - the notch is perpendicular to the direction of vibration (WD); Curve No. 3 - the notch is parallel to the direction of vibration (WD). A characteristic feature of the deformation diagrams for specimens with the parallel notch is the presence of two local maxima. This contrasts with the force change curve for the perpendicular notch specimens.
R.M. Kashaev, M.I. Nagimov
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Year: 2021 Volume: 11     Issue: 4s Pages: 557-560
Journal section: Mechanical and physical properties of materials
Molecular dynamics simulation is utilized to analyze the role of applied compressive and shear strain on the mechanical performances of Al/Ti composite. Mixing of atoms near the interface between Al and Ti during deformation is analysed.

Molecular dynamics investigation of atomic mixing and mechanical properties of Al / Ti interface

Molecular dynamics simulation is utilized to analyze the role of applied compressive and shear strain on the mechanical performances of Al/Ti composite. Mixing of atoms near the interface between Al and Ti during deformation is analysed.
P.V. Polyakova, S.A. Shcherbinin, J.A. Baimova
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Year: 2021 Volume: 11     Issue: 4s Pages: 561-565
Journal section: Theory and computer simulations in materials science and condensed matter physics
It is shown that radial-shear rolling makes it possible to form a gradient structure in the 58Ni-Cr-Mo-B-Al-Cu superalloy billet. In which the recrystallized grains size of the γ-phase in the radial direction from coarse-grained (34.1 ± 4.7 μm) in the center to ultrafine-grained (2.4 ± 1.7 μm ) in the surface layers of the billet cross-section. This leads to a gradient change in microhardness. The microhardness value is 3.3 GPa in the billet center, and the microhardness increases to 5.4 GPa in the peripheral near-surface zone.

The influence of radial shear rolling on the structure and properties of 58Ni-Cr-Mo-B-Al-Cu superalloy

It is shown that radial-shear rolling makes it possible to form a gradient structure in the 58Ni-Cr-Mo-B-Al-Cu superalloy billet. In which the recrystallized grains size of the γ-phase in the radial direction from coarse-grained (34.1 ± 4.7 μm) in the center to ultrafine-grained (2.4 ± 1.7 μm ) in the surface layers of the billet cross-section. This leads to a gradient change in microhardness. The microhardness value is 3.3 GPa in the billet center, and the microhardness increases to 5.4 GPa in the peripheral near-surface zone.
A.A. Bikmukhametova, E.V. Galieva, I.S. Valeev, E.Y. Klassman, I.I. Musabirov, V.A. Valitov
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Year: 2021 Volume: 11     Issue: 4s Pages: 566-570
Journal section: Experimental methods in materials research