Structural evolution of contact parts of the friction stir processing heat-resistant nickel alloy tool used for multi-pass processing of Ti6Al4V/(Cu+Al) system

Zykova, Anna; Vorontsov, A. V.; Чумаевский, А. В.; Gurianov, D. A.; Gusarova, A. V.; Колубаев, Е. А.; Tarasov, S. Yu.

doi:10.1016/j.wear.2021.204138

Cited by 14 publications

(23 citation statements)

References 26 publications

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“…The surface elemental composition of the distinct test specimens ensuing interactive sliding at variable SV and load conditions are shown in Figure 15. The trends depict that considerable diffusion of oxygen and carbon into the TL (MML) occurs during tribo-analysis and is consistent with the previous work [34]. The highly reactive nature of the Ti-alloys has possibly assisted in the specified occurrence, whose propensity is substantially enhanced through the rise in interfacial temperature due to frictional heating.…”

Section: Resultsmentioning

confidence: 99%

“…Besides, at high velocities, the oxides can leave the wear track region exposing the substrate to interact with the counterbody. At high load conditions, the debris is retained within the mating zone, nevertheless, the strain/ work-hardened layer (MML) with insufficient oxygen concentration is inclined to be perforated by the hard particulates [34]. This can lead to crack formation/ growth and propagation assisting in material removal by mechanisms of micro-fragmentation/brittle detachment.…”

Section: Wear Mechanismsmentioning

confidence: 99%

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Tribo-behavioural transition of Ti6Al4V as a function of sliding velocity and load under dry sliding conditions

Philip

Kuriachen

Kumar

et al. 2022

Tribology - Materials, Surfaces & Interfaces

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In this work, the dry sliding wear characteristics of Ti6Al4V (Ti64) -EN31 (steel) tribo-pair at incremental sliding velocity (SV, 0.838-1.466 ms -1 ) and load (L, 50-100 N) conditions are elucidated. As evident, specific wear rate (SWR) and coefficient of friction (CoF) increases and decreases, respectively with load and SV. The wear response of Ti64 undergoes a transition from composite type (oxidative and metallic) to delamination. The evolved oxides, viz. TiO and Ti 8 O 15 were majorly in the form of free particulates. At low SV (0.838-1.047 ms -1 ) and low load (50-70 N), the movable particulates can activate a separation effect limiting the damage due to wear. During severe sliding (SV = 1.257-1.466 ms -1 and L = 70-100 N), the combined influence of frictional heating instigated thermal softening, and the formation/retainment of hard-coarse particulates at the interaction zone causes perforation into the substratum, assisting in spalling.

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Section: Resultsmentioning

confidence: 99%

Section: Wear Mechanismsmentioning

confidence: 99%

Tribo-behavioural transition of Ti6Al4V as a function of sliding velocity and load under dry sliding conditions

Philip

Kuriachen

Kumar

et al. 2022

Tribology - Materials, Surfaces & Interfaces

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“…An FSP tool (ISPMS SB RAS, Tomsk, Russia) with a truncated cone 2 mm height pin, ∅20 mm shoulder, and inclination angle of 3° was machined from a heat-resistant nickel ZhS6U superalloy [ 27 ]. This FSP tool was always rotating anti-clockwise during the processing.…”

Section: Methodsmentioning

confidence: 99%

“…Second, there is a need for heat- and wear-resistant FSP tool material that is capable of maintaining the efficiency of FSP on titanium alloys [ 21 , 26 ], which is characterized by high strain, high temperatures, and high strain rates. One of the candidates may be using a heat-resistant superalloy that allowed obtaining a FSPed stir zone despite its severe wear when processing on titanium alloy [ 27 ].…”

Section: Introductionmentioning

confidence: 99%

In Situ Intermetallics-Reinforced Composite Prepared Using Multi-Pass Friction Stir Processing of Copper Powder on a Ti6Al4V Alloy

et al. 2022

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Multi-pass friction stir processing (FSP) was used to obtain a titanium alloy/copper hybrid composite layer by intermixing copper powder with a Ti6Al4V alloy. A macrostructurally inhomogeneous stir zone was obtained with both its top and middle parts composed of fine dynamically recrystallized α- and b-Ti grains, as well as coarse intermetallic compounds (IMCs) of Ti2Cu and TiCu2, respectively. Some b grains experienced β → α a decomposition with the formation of acicular α-Ti microstructures either inside the former b-Ti grains or at their grain boundaries. Both types of β → α a decomposition were especially clearly manifested in the vicinity of the Ti2Cu grains, i.e., in the copper-lean regions. The middle part of the stir zone additionally contained large dislocation-free b-Ti grains that resulted from static recrystallization. Spinodal decomposition, as well as solid-state amorphization of copper-rich b-Ti grains, were discovered. The FSPed stir zone possessed hardness that was enhanced by 25% as compared to that of the base metal, as well as higher strength, ductility, and wear resistance than those obtained using four-pass FSPed Ti6Al4V.

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“…The formation of a composite structure in an aluminum alloy can be achieved by different methods: casting with stirring [ 12 , 13 , 14 , 15 ], powder metallurgy [ 16 ], laser surface alloying [ 17 , 18 ], electromechanical machining [ 19 , 20 ], friction surfacing [ 21 ], lateral friction surfacing [ 22 ] and friction stir processing (FSP) [ 23 , 24 , 25 , 26 ]. It was mentioned above that using fusion processes such as casting or laser melting would definitely decompose the zirconium tungstate, especially in the presence of such a strong reducing agent as aluminum.…”

Section: Introductionmentioning

confidence: 99%

In-Situ Al-Mg Alloy Base Composite Reinforced by Oxides and Intermetallic Compounds Resulted from Decomposition of ZrW2O8 during Multipass Friction Stir Processing

Чумаевский

Zykova²,

Sudarikov³

et al. 2023

Materials

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In the presented work, the effect of friction stir processing admixing the zirconium tungstate ZrW2O8 powder on the microstructure, mechanical and tribological properties of the AA5056 Al-Mg alloy stir zone has been studied. The FSP resulted in obtaining dense composite stir zones where α-ZrW2O8 underwent the following changes: (i) high-temperature transformation into metastable β’-ZrW2O8 and (ii) decomposition into WO3 and ZrO2 oxides followed by the formation of intermetallic compounds WAl12 and ZrAl3. These precipitates served as reinforcing phases to improve mechanical and tribological characteristics of the obtained fine-grained composites. The reduced values of wear rate and friction coefficient are due to the combined action the Hall–Petch mechanism and reinforcement by the decomposition products, including Al2O3, ZrO2, β’-ZrW2O8 and intermetallic compounds such as WAl12 and ZrAl3. Potential applications of the above-discussed composites maybe related to their improved tribological characteristics, for example in aerospace and vehicle-building industries.

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Structural evolution of contact parts of the friction stir processing heat-resistant nickel alloy tool used for multi-pass processing of Ti6Al4V/(Cu+Al) system

Cited by 14 publications

References 26 publications

Tribo-behavioural transition of Ti6Al4V as a function of sliding velocity and load under dry sliding conditions

Tribo-behavioural transition of Ti6Al4V as a function of sliding velocity and load under dry sliding conditions

In Situ Intermetallics-Reinforced Composite Prepared Using Multi-Pass Friction Stir Processing of Copper Powder on a Ti6Al4V Alloy

In-Situ Al-Mg Alloy Base Composite Reinforced by Oxides and Intermetallic Compounds Resulted from Decomposition of ZrW2O8 during Multipass Friction Stir Processing

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