The role of process temperature and rotational speed in the microstructure evolution of Ti-6Al-4V friction surfacing coatings

Fitseva, Viktoria; Hanke, Stefanie; Santos, Jorge F. dos; Stemmer, Priska; Gleising, B.

doi:10.1016/j.matdes.2016.07.132

Cited by 21 publications

(15 citation statements)

References 12 publications

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“…The larger extension of flash on Ti Grade 1 may be directly related to the lack of alloying elements in its composition, presenting lower resistance and leading to higher temperatures 8 . The feasibility of Ti-6Al-4V coatings on self-mating substrates was shown recently 1,8,9 and the obtained results were successful. Titanium is an expensive material, though it has interesting properties and its deposition can be used in a wide range of applications.…”

Section: Introductionmentioning

confidence: 61%

“…Fig. 5 shows the change in microstructure at the rod tip due to the higher temperatures achieved, generated by the hot work at the rod tip and the coating generated heat that is conducted along the consumable rod, pre-heating the material and allowing its plastic deformation 8 . Therefore, the heat conducted to the rod is not considered as a loss of energy, since pre-heats the consumable material that will be deposited as a coating 5 .…”

Section: Microstructure and Hardness Of The Rodsmentioning

confidence: 99%

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Effects of Friction Surfacing on the Characteristics of Consumable Rods of Ti-6Al-4V

et al. 2019

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Friction surfacing (FS) is a coating technique applied mainly in corrosion protection and repair of components. The study addresses the effects of deposition and rotational speeds on the rods characteristics and process efficiency for the deposition of Ti-6Al-4V on self-mating substrates by FS. The consumption rate was 1.8 mm/s, deposition speeds of 8, 16 and 24 mm/s and rotational speeds of 2000, 3000 and 4000 rpm. It was shown that the flash forms primarily at the rod, ascending around the tip and leaving the coating without flash. The higher deposition speeds led to a decrease in rod thickness and diameter. For higher rotational speeds, an increase in diameter and decrease in thickness is observed for the flash on the rod. Experiments have shown that the rotational and deposition speeds have a decisive influence on the flash formation. Its microstructure changes due to the welding process and a change in hardness can be observed.

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Section: Introductionmentioning

confidence: 61%

Section: Microstructure and Hardness Of The Rodsmentioning

confidence: 99%

Effects of Friction Surfacing on the Characteristics of Consumable Rods of Ti-6Al-4V

et al. 2019

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“…In metals with lower stacking fault energies, such as stainless steel and Ti-6Al-4V, the dislocation structures that develop are markedly different from nickel ( Figure 10) [18,22,[60][61][62]. In these metals the microstructure is dominated by dislocation tangles and dislocation walls, which lie along the dominant slip planes [56,57] rather than the subgrain and cell structure found in nickel.…”

Section: Figure 9 the Change In Crystal Size (In å) Plotted Againstmentioning

confidence: 99%

An evaluation of diffraction peak profile analysis (DPPA) methods to study plastically deformed metals

2016

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A range of diffraction peak profile analysis (DPPA) techniques were used to determine details of the microstructure of plastically deformed alloys. Four different alloys were deformed by uniaxial tension and compression to a range of strains. The methods we have considered include, the full-width, Williamson-Hall methods, Warren-Averbach methods, and van Berkum's alternative method. Different metals were chosen to understand the effect of the deformation microstructure and crystal structure, a nickel alloy, two stainless steel alloys and two titanium alloys.

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“…It could be noted that by increasing the rotational speed it led to higher forces and lower torques applied by the machine. Fitseva et al 6 stated that from a given rotational speed, higher values do not influence considerably in increasing the temperature of the process, therefore the increase in axial force for higher rotational speed can be considered as a consequence of the high strain applied by unit of distance. On the other hand, the torque decays slowly since the plastified material reaches a condition of low viscosity, due to the low strain rates, limiting the heat generation and promoting a steady state of temperature.…”

Section: Coating Geometrymentioning

confidence: 99%

“…Its close-packed hexagonal structure (α phase) changes to a body-centered cubic structure (β-phase) at 885ºC (1625ºF), and this structure persists at temperatures up to the melting point 6 . During cooling, the backward transformation results in lamellar α plates, as can be seen in the coating in Figure 7 (a).…”

Section: Microstructural Analysismentioning

confidence: 99%

Influence of Rotational Speed in the Friction Surfacing of Titanium Grade 1 on Ti-6Al-4V

Vale

Fitseva²,

Hanke³

et al. 2018

Mat. Res.

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Titanium Grade 1 was deposited on Ti-6Al-4V, 2 mm thickness, by Friction Surfacing. The process parameters were rotational speed, deposition speed and consumption rate. Only the rotational speed was varied in order to evaluate the influence of this parameter on the coatings generated. The applicability of the process has been described for a large number of materials, although the depositions of titanium alloys are still not widely studied. The objective is to investigate the effects of the rotational speed on the coatings' geometry and microstructural evolution. This investigation has shown that Titanium Grade 1 coatings can be deposited onto a Ti-6Al-4V by Friction Surfacing depending on the rotational speed. The coatings' surface homogeneity was influenced by the rotational speed, being inhomogeneous for the lowest speed. The coatings' thickness and width increased with enhancing this speed. The heat affected zone in the substrate corresponded to the complete thickness under the depositions.

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The role of process temperature and rotational speed in the microstructure evolution of Ti-6Al-4V friction surfacing coatings

Cited by 21 publications

References 12 publications

Effects of Friction Surfacing on the Characteristics of Consumable Rods of Ti-6Al-4V

Effects of Friction Surfacing on the Characteristics of Consumable Rods of Ti-6Al-4V

An evaluation of diffraction peak profile analysis (DPPA) methods to study plastically deformed metals

Influence of Rotational Speed in the Friction Surfacing of Titanium Grade 1 on Ti-6Al-4V

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