Phase transformations and structural changes in the course of the high-temperature superplastic deformation of aluminum alloys

Bryukhovetskii, V. V.; Poyda, V. P.; Poyda, A. V.; Kuznetsova, R. I.; Mahmoud, Kaafarani Ali; Pedun, D. E.

doi:10.1134/s0031918x10120100

Cited by 7 publications

(2 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For its realization, grain boundaries must be in an activated state. The presence of local inclusions of liquid phase at grain boundaries may be one of such activated states [31][32][33][34]. In the case of AA1933 alloy studied in this paper, such a state can be realized during cooling of the surface layer molten by HCPEB, when due to liquation processes, the inner part of grains will be already crystallized, while the periphery of grains will still be in the liquid state.…”

Section: Fig 4 Characteristic Types Of Microstructure Of Fragments Of...mentioning

confidence: 99%

Residua Stresses and Deformation Mechanisms in the Surface Layer of Aa1933 Aluminum Alloy Induced by High-Current Pulsed Electron Beam

Bryukhovetsky,

Lytvynenko,

Myla

et al. 2024

Problems of Atomic Science and Technology

View full text Add to dashboard Cite

The purpose of the present study was to find out and show that rapid solidification of the surface layer of AA1933 aluminum alloy melted by irradiation with a high-current pulsed electron beam leads to the development of deformation processes in this layer. This results from thermo-elastic internal stresses arising during irradiation of the alloy with a pulsed electron beam. The value of residual internal stresses in the irradiation-remelted layer is 43 MPa. Since it is impossible to determine the deformation mechanisms during cooling of the remelted layer by direct methods, conclusions about the deformation mechanisms were made by studying the relief of the irradiated surface. This study shows that deformation processes during irradiation of AA1933 aluminum alloy can develop in different parts of the irradiated surface by different mechanisms. Deformation can be carried out by both dislocation slip and grain-boundary slipping mechanisms.

show abstract

Section: Fig 4 Characteristic Types Of Microstructure Of Fragments Of...mentioning

confidence: 99%

Residua Stresses and Deformation Mechanisms in the Surface Layer of Aa1933 Aluminum Alloy Induced by High-Current Pulsed Electron Beam

Bryukhovetsky,

Lytvynenko,

Myla

et al. 2024

Problems of Atomic Science and Technology

View full text Add to dashboard Cite

show abstract

“…At the same time, the establishment of correlation between the composition, structure and properties of metallic materials is the most important task of metal science. However, despite the vast accumulated experimental material distinguished the correlation between the item structure and properties, this issue is subject to further research, as well as the mechanisms responsible for the hardness of aluminum alloys of the Al-Cu-Mg system, despite the growing number of works devoted to thermal hardening of these items [6,7]. The paper studies D16AT aluminum alloy, which belongs to the wrought aluminum alloy brand.…”

Section: Introductionmentioning

confidence: 99%

Strengthening Mechanisms in the Surface Layer of Duralumin Modified by a High Current Pulsed Relativistic Electron Beam

Bryukhovetsky¹,

Lytvynenko²,

Myla³

et al. 2021

J. Nano- Electron. Phys.

View full text Add to dashboard Cite

The mechanisms of strengthening of the surface layer of D16AT aluminum alloy irradiated with a high-current relativistic electron beam were studied. The alloy was irradiated with an electron beam with a particle energy of 0.35 MeV, a beam current of 2.0 kA, and a pulse duration of 5 μs. This article shows that the processing of D16AT aluminum alloy by a high-current relativistic electron beam leads to melting of irradiated surface and the formation of a surface layer with a modified structural-phase state. The thickness of this layer is approximately 100 m. A solid solution based on aluminum is the main constituent of this layer. At the same time, intermetallic phases that were present in the initial state of the alloy cannot be detected by means of X-ray diffractometry. It was established that processing of the surface of D16AT alloy with a pulsed electron beam leads to grain refining. In the initial state of the alloy, the average grain size is 11 m. In the modified layer, the average grain size is approximately 0.8 m. The microhardness of the irradiated layer increases by almost 50 %. The contribution of different strengthening mechanisms to the change of strength characteristics of the modified surface layer was analyzed. It was shown that the dispersion mechanism makes the main contribution to the strengthening of the alloy in the initial state. While the dislocation mechanism of strengthening plays a key role in increasing the microhardness of the irradiated layer. The importance of these observations for thermomechanical processing of aluminum alloys in order to further improve their strength characteristics was discussed.

show abstract

Mechanisms of deformation induced by high-current pulsed electron beam irradiation

Bryukhovetsky,

Lytvynenko,

Startsev

et al. 2024

Materials Letters

View full text Add to dashboard Cite

Phase transformations and structural changes in the course of the high-temperature superplastic deformation of aluminum alloys

Cited by 7 publications

References 11 publications

Residua Stresses and Deformation Mechanisms in the Surface Layer of Aa1933 Aluminum Alloy Induced by High-Current Pulsed Electron Beam

Residua Stresses and Deformation Mechanisms in the Surface Layer of Aa1933 Aluminum Alloy Induced by High-Current Pulsed Electron Beam

Strengthening Mechanisms in the Surface Layer of Duralumin Modified by a High Current Pulsed Relativistic Electron Beam

Mechanisms of deformation induced by high-current pulsed electron beam irradiation

Contact Info

Product

Resources

About