Journal ArticleDOI
Friction surfacing of Ti–6Al–4V: Process characteristics and deposition behaviour at various rotational speeds
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TLDR
In this article, the authors defined the process parameter fields for the deposition of Ti-6Al-4V leading to flash and defect free coatings and associated them with geometric features of the deposited layer.Abstract:
By the process of friction surfacing, coatings are generated from metallic materials at temperatures below their melting range. The high degree of deformation while depositing leads to grain refinement in the microstructure, which has a positive effect on the mechanical properties of the layer. The applicability of the process has been described for a large number of materials. The deposition of Ti–6Al–4V has been reported in one publication but was not systematically studied. Therefore, the main aims of the present work are to define the process parameter fields for the deposition of Ti–6Al–4V leading to flash and defect free coatings and associate them with geometric features of the deposited layer. This investigation has shown that Ti–6Al–4V coatings can be effectively deposited onto a Ti–6Al–4V substrate by friction surfacing. A wide range of process parameters was established in which coatings of high quality have been obtained. The consumption rate control has been implemented as an efficient mode for the deposition of Ti–6Al–4V coatings. Temperature measurements at the coating interface have been accomplished showing that the coating material has been deformed in the β-phase. Furthermore, the homogeneity of the coating surface has been established to be a function of the rotational speed. The coatings exhibited a defect-free bond at the interface with the substrate. Two process parameter ranges with respect to the flash formation have been established. One of them enables flash-free coatings and the other generates coatings with flash formation on the retreating side, which can be controlled by the rotational and deposition speeds. Moreover, an increase in the rotational speed has been shown to lead to an increase in the coating thickness and width as well as an increase in the deposition efficiency up to 39 %.read more
Citations
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Journal ArticleDOI
Surface characteristics of Ti–6Al–4V alloy by EDM with Cu–SiC composite electrode
TL;DR: In this article, the machining characteristics of Ti-6Al-4V with Cu-SiC composite electrode have been analyzed, and the machined surfaces show irregular compound structures, droplets of debris, shallow craters, and micro-pores.
Journal ArticleDOI
Comparative study of severe plastic deformation at elevated temperatures of two aluminium alloys during friction surfacing
Stefanie Hanke,J.M.F. dos Santos +1 more
TL;DR: In this paper, the authors compared the performance of different alloy types in terms of material strength, thermal softening rate and recrystallization mechanisms, and observed differences with regard to material strength and material efficiency.
Journal ArticleDOI
Application of Friction Surfacing to the Production of Aluminum Coatings Reinforced with Al2O3 Particles
Pedro Henrique Fernandes Oliveira,Juan Carlos Galvis,Juliana de Paula Martins,André Luis Moreira de Carvalho +3 more
TL;DR: In this article, a KONE KFE-3/BR milling machine was used to produce deposits of AA6351-T6, reinforced with alumina (Al2O3) particles, over a substrate of AA5052-H32 through friction surfacing.
Journal ArticleDOI
Spindle speed in friction surfacing of 316L stainless steel – How it affects the microstructure, hardness and pitting corrosion resistance
TL;DR: In this article, the spindle speed employed in FS was found to have a more significant effect on the microstructure of the coating surface than that in the cross-section.
Journal ArticleDOI
Microstructure and wear characterization of AA2124/4wt.%B4C nano-composite coating on Ti−6Al−4V alloy using friction surfacing
TL;DR: In this article, the authors developed AA2124/4wt.%B 4 C nano-composite coatings on Ti−6Al−4V using friction surfacing to improve the wear resistance.
References
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Journal ArticleDOI
Friction surfacing—A review
João Gandra,H. Krohn,Rosa Maria Mendes Miranda,Pedro Vilaça,Luísa Quintino,J.M.F. dos Santos +5 more
TL;DR: Friction surfacing (FS) is a solid state technology with increasing applications in the context of localized surface engineering and has been investigated mainly for producing fine grained coatings, which exhibit superior wear and corrosion properties.
Journal ArticleDOI
Performance analysis of friction surfacing
TL;DR: In this article, the influence of forging force, consumable tilt angle, travel and rotation speeds on interfacial bond properties and process efficiency of mild steel was investigated, and the applied load on the consumable rod was found essential to improve joining efficiency and to increase the deposition rate.
Journal ArticleDOI
Microstructural evolution during friction surfacing of tool steel H13
TL;DR: In this article, the microstructural evolution during friction surfacing of H13 tool steel is discussed, and the current work shows that friction surfaced tool steel coatings are suitable for use in as-deposited condition.
Journal ArticleDOI
Friction surfaced tool steel (H13) coatings on low carbon steel: A study on the effects of process parameters on coating characteristics and integrity
TL;DR: In this article, a process parameter window was developed for satisfactory deposition of tool steel coatings, and the effects of process parameters on coating characteristics and integrity were evaluated, and it was shown that coating width is a strong function of mechtrode rotational speed, while coating thickness is mainly dependent on substrate traverse speed.