Experimental study on microstructural evolution, mechanical property, and corrosion behaviour of laser additive manufactured (LAM) titanium alloy grade 5

Fatoba, O.S.; Jen, Tien-Chien; Akinlabi, Esther Titilayo

doi:10.1007/s00170-021-06872-3

Cited by 5 publications

(3 citation statements)

References 57 publications

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“…This layer of metal powder is applied to a building platform and exposed in areas to be melted using Yb (Ytterbium) fiber laser. 24 During the exposure of first layer, a metallurgical joint is generated between building platform and solidified metal powder. In this way the part produced is bonded to the building platform directly layer by layer.…”

Section: Fabrication Of Amed Ti-6al-4vmentioning

confidence: 99%

Study on machinability characteristics of novel additive manufactured titanium alloy (Ti-6Al-4V) fabricated by direct metal laser sintering

Sahoo

Routara

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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The pressing demand of Ti-6Al-4V (grade 5) in aerospace, medical, marine, and chemical processing industries has gained momentum in recent years due to its excellent properties such as high strength to weight ratio and corrosion resistance, bio-compatibility and a common material for additive manufacturing. Additive manufactured Ti-6Al-4V have higher mechanical properties as compared to wrought alloys due to difference in microstructure that negatively influences the machinability characteristics and also lacks ductility. The main limitation of fabricated additive manufactured (AMed) component is the poor surface quality, staircase effect and adhering of non-melted powder particles to the fabricated components. Again, fatigue life of components increases with decrease of surface roughness. Therefore the need of machining of AMed titanium alloys in recent years are gaining importance to eliminate these problems so that desired surface quality and tolerances can be achieved. Therefore the objective of the study is to develop additive manufactured Ti-6Al-4V through direct metal laser sintering process and investigate its machinability characteristics under flood cooling environment with respect to responses as tool wear, surface roughness, cutting temperature, and chip morphology. As most of the heat generated at the interfaces has been carried away through flood cooling, the rate of growth of tool wear, cutting temperature, surface roughness, and degree of serration decreases and thus makes the performance of AMed Ti alloys are comparable with wrought Ti alloys. The dominant tool wear mechanism during machining AMed Ti alloy have been found to be abrasion, chipping, adhesion, BUE, chemical interaction between titanium and cutting tool materials, coating delamination. Optimal parameters for multi-responses are 0.1 mm depth of cut, 0.1 mm/rev feed rate, and 70 m/min cutting speed and improved. Mathematical models are said to be significant and fitted well. Because of the improved machinability, AMed Ti alloys find itself suitable in industrial applications.

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Section: Fabrication Of Amed Ti-6al-4vmentioning

confidence: 99%

Study on machinability characteristics of novel additive manufactured titanium alloy (Ti-6Al-4V) fabricated by direct metal laser sintering

Sahoo

Routara

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…On the matrix, a dependable coating devoid of pores and cracks can be created with the right laser processing settings [7]. Because of the significant temperature differences between the melted surface area and the solid substrate beneath, this causes the new alloy to self-quench and resolidify quickly [8,9]. Poulon-Quintina et al [10] stated that some microstructures, such as metastable phases and nano-crystalline grains, can be produced by laser beams due to unique thermal properties brought about by laser irradiation.…”

Section: Introductionmentioning

confidence: 99%

The Interplay of Thermal Gradient and Laser Process Parameters on the Mechanical Properties, Geometrical and Microstructural Characteristics of Laser-Cladded Titanium (Ti6Al4V) Alloy Composite Coatings

Fatoba,

Jen

2023

Metals

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With the development of laser surface modification techniques like direct laser metal deposition (DLMD), titanium alloy (TI6Al4V) may now have its entire base metal microstructure preserved while having its surface modified to have better characteristics. Numerous surface issues in the aerospace industry can be resolved using this method without changing the titanium alloy’s primary microstructure. As a result, titanium alloy is now more widely used in sectors outside of aerospace and automotive. This is made possible by fabricating metal composite coatings on titanium alloys using the same DLMD method. Any component can be repaired using this method, thereby extending the component’s life. The experimental process was carried out utilizing a 3000 W Ytterbium Laser System at the National Laser Centre of the CSIR in South Africa. Through the use of a laser system, AlCuTi/Ti6Al4V was created. The characterization of the materials for grinding and polishing was performed according to standard methods. There is a substantial correlation between the reinforcement feed rate, scan speed, and laser power components. Due to the significant role that aluminum reinforcement played and the presence of aluminum in the base metal structure, Ti-Al structures were also created. The reaction and solidification of the copper and aluminum reinforcements in the melt pool produced the dendritic phases visible in the microstructures. Compared to the base alloy, the microhardness’s highest value of 1117.2 HV1.0 is equivalent to a 69.1% enhancement in the hardness of the composite coatings. The enhanced hardness property is linked to the dendritic phases formed in the microstructures as a result of optimized process parameters. Tensile strengths of laser-clad ternary coatings also improved by 23%, 46.2%, 13.1%, 70%, 34.3%, and 51.7% when compared to titanium alloy substrates. The yield strengths of laser-clad ternary coatings improved by 19%, 46.7%, 12.9%, 69.3%, 34.7%, and 52.1% when compared to the titanium alloy substrate.

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“…The design of the Ti-Mo-Si alloys was based on information about the physical properties of the alloying elements (melting temperature and density), as well as the equilibrium diagrams for the Ti-Mo-Si alloys [23][24][25].…”

mentioning

confidence: 99%

New Titanium Alloys, Promising Materials for Medical Devices

et al. 2021

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Titanium alloys are used in medical devices due to their mechanical properties, but also for their corrosion resistance. The natural passivation of titanium-based biomaterials, on the surface of which a dense and coherent film of nanometric thickness is formed, composed mainly of TiO2, determines an apparent bioactivity of them. In this paper, the method of obtaining new Ti20MoxSi alloys (x = 0.0, 0.5, 0.75, and 1.0) is presented, their microstructure is analyzed, and their electrochemical responses in Ringer´s solution were systematically investigated by linear polarization, cyclic potential dynamic polarization, and electrochemical impedance spectroscopy (EIS). The alloys corrosion resistance is high, and no evidence of localized breakdown of the passive layer was observed. There is no regularity determined by the composition of the alloys, in terms of corrosion resistance, but it seems that the most resistant is Ti20Mo1.0Si.

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Experimental study on microstructural evolution, mechanical property, and corrosion behaviour of laser additive manufactured (LAM) titanium alloy grade 5

Cited by 5 publications

References 57 publications

Study on machinability characteristics of novel additive manufactured titanium alloy (Ti-6Al-4V) fabricated by direct metal laser sintering

Study on machinability characteristics of novel additive manufactured titanium alloy (Ti-6Al-4V) fabricated by direct metal laser sintering

The Interplay of Thermal Gradient and Laser Process Parameters on the Mechanical Properties, Geometrical and Microstructural Characteristics of Laser-Cladded Titanium (Ti6Al4V) Alloy Composite Coatings

New Titanium Alloys, Promising Materials for Medical Devices

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