Use of Plasma Surface for Additive Formation of Aluminum Alloys Blade

Shchitsyn, Yury; Krivonosova, E. A.; Nelyubin, S. S.; Ol’shanskaya, T. V.; Nikulin, R. G.; Федосеева, Е М; Terentyev, Sergey

doi:10.15593/2224-9877/2019.2.08

Cited by 5 publications

(2 citation statements)

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“…Additive arc processes, which make it possible to synthesize large metal parts with a minimum allowance for machining and properties at the level of metals of traditional technologies, ensure significant savings of metal and reduce the costs of pre-production engineering [ 1 , 2 , 3 , 4 ]. This concerns the production of aluminum [ 5 , 6 ], titanium [ 7 , 8 , 9 , 10 ], and other light high-strength alloys.…”

Section: Introductionmentioning

confidence: 99%

Formation of Structure and Properties of Two-Phase Ti-6Al-4V Alloy during Cold Metal Transfer Additive Deposition with Interpass Forging

et al. 2021

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The paper deals with the main formation patterns of structure and properties of a titanium alloy of the Ti-6Al-4V system during additive manufacturing using cold metal transfer (CMT) wire deposition. The work aims to find the optimal conditions for layer-by-layer deposition, which provides the high physical and mechanical properties of the titanium alloy of the Ti-6Al-4V system hybrid, additively manufactured using CMT deposition. Particular attention is paid to interpass forging during the layered printing of the product. Additionally, we investigate how the heat treatment affects the structure and properties of the Ti-6Al-4V alloy that has been CMT-deposited, both with and without forging. These studies have shown that the hybrid multilayer arc deposition technology, with interpass strain hardening, allows the use of high temperature and high technology titanium alloys to obtain products of a required geometric shape. It has been proven that the interpass deformation effect during CMT deposition contributes to a significant decrease in the sizes of the primary β-grains. In addition, forging enhances the effect of microstructure refinement, which is associated with phase recrystallization in deformed areas. It is shown that the heat treatment leads not only to a change in the morphology of the phases but also to additional phase formations in the structure of the Ti-6Al-4V-deposited metal while the mechanism is realized and consists of the gradual decomposition of the martensitic α′-phase and the formation of a dispersive α2-phase. This structure formation process is accompanied by the dispersion hardening of the α-phase. The strength characteristics of the Ti-6Al-4V alloy obtained using layer-by-layer CMT with forging are given; they exceed the strength level of materials obtained with the traditional technologies of pressure treatment, and there is no decrease in plasticity characteristics. The use of the subsequent heat treatment makes it possible to increase the ductility characteristics of the deposited and forged Ti-6Al-4V material by 1.5–2 times without strength loss.

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Section: Introductionmentioning

confidence: 99%

Formation of Structure and Properties of Two-Phase Ti-6Al-4V Alloy during Cold Metal Transfer Additive Deposition with Interpass Forging

et al. 2021

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“…The use of additive arc processes, which make it possible to synthesize large-sized components with minimum allowance for machining and mechanical properties at the metal level of traditional technologies, permits to obtain significant metal saving and reduce many-fold the production tooling spendings [1][2][3][4][5][6][7]. This fully applies to making products of such expensive materials as titanium alloys [8][9].…”

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confidence: 99%

Application of plasma surfacing for additive formation of titanium alloy billets

Shchitsyn¹,

Krivonosova²,

Ol’shanskaya³

et al. 2021

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This paper presents the findings of an investigation on the main formation regularities of structure and properties of VT20 (ВТ20) superalloy of Ti -Al -V -Mo -Zr system in hybrid technology of additive manufacturing with the use of plasma surfacing with layer-by-layer strain hardening. When studying the effect of forging on the structure and properties of surfacing material, three processing schemes were implemented: surfacing with forging of a next to last layer; surfacing with forging of the last layer; surfacing with forging of each layer. Investigated is the morphology of the built-up layers' structure, which is associated with various cooling rates at the stages of crystallization and transformations in the solid state: at high cooling rate, a basket weave structure is forming, and a martensite-like lamellar structure arises on slow cooling. Different dispersities of the plates of D-colonies were fixed -from 200 to 500 μm, the size of individual needles varies from fractions of a micron to 100 μm. It is established that the layer-by-layer deformation impact, which contributes to the titanium alloy structure grinding and a rise in dispersion of the D-phase plates, is accompanied by an increase in microhardness to the level of 6000 HV. The formation of a finer structure during surfacing with a layer-by-layer deformation effect is obviously bound up with the martensate phase lightened growth on a pre-crushed metal substrate with an increased dislocation density. It is established that the strength properties of the obtained VT20 alloy surfacings exceed the strength level of materials made by traditional forming technologies, and there is no decrease in the plasticity characteristics.

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Mechanical properties and microstructure of multi-pass butt weld of plates made of Al-Mg-Zr alloy sparingly doped with scandium

Dovzhenko

Демченко

Bezrukikh

et al. 2021

Int J Adv Manuf Technol

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Use of Plasma Surface for Additive Formation of Aluminum Alloys Blade

Cited by 5 publications

References 0 publications

Formation of Structure and Properties of Two-Phase Ti-6Al-4V Alloy during Cold Metal Transfer Additive Deposition with Interpass Forging

Formation of Structure and Properties of Two-Phase Ti-6Al-4V Alloy during Cold Metal Transfer Additive Deposition with Interpass Forging

Application of plasma surfacing for additive formation of titanium alloy billets

Mechanical properties and microstructure of multi-pass butt weld of plates made of Al-Mg-Zr alloy sparingly doped with scandium

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