Improvement of machinability of Ti and its alloys using cooling-lubrication techniques: a review and future prospect

Pimenov, Danil Yurievich; Mia, Mozammel; Gupta, Munish Kumar; Machado, Álisson Rocha; Tomaz, Ítalo; Sarıkaya, Murat; Wojciechowski, Szymon; Mikołajczyk, Tadeusz; Kapłonek, Wojciech

doi:10.1016/j.jmrt.2021.01.031

Cited by 182 publications

(55 citation statements)

References 165 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…An alternative is to use a non-water-based or oil-based coolant such as liquid nitrogen and carbon dioxide which are also known as cryogenic coolants. The use of cryogenic coolants was mainly proposed for machining hard to cut materials such as titanium and steel alloys [7][8][9]. Cryogenic coolants are environmentally friendly, providing a clean machining process without the need to dispose or handle the coolant waste [10].…”

Section: Introductionmentioning

confidence: 99%

The effect of cryogenic machining of S2 glass fibre composite on the hole form and dimensional tolerances

Köklü

Morkavuk

Featherston

et al. 2021

Int J Adv Manuf Technol

View full text Add to dashboard Cite

S2 glass fibre reinforced epoxy composites are widely used in aeronautical applications owing to their excellent strength to weight ratio. Drilling glass fibres can be cumbersome due to their abrasive nature and poor thermal conductivity. Moreover, the use of conventional coolants is not desirable due to contamination and additional costs for cleaning the machine part. An alternative is to use environmentally friendly coolants such as liquid nitrogen (LN2) which have been previously employed in machining metals and composites. The current study investigates the effect of drilling S2 glass fibre composite in a bath of LN2. The study aims to evaluate the effect of spindle speed, feed rate and the presence of cryogenic cooling on the form and dimensional tolerances of the hole (hole size, circularity, cylindricity and perpendicularity). Design of experiments and analysis of variance (ANOVA) were used to determine the contribution of the input parameters on the analysed hole quality metrics. Results indicated that drilling S2 glass fibre in a cryogenic bath increased hole size significantly beyond the nominal hole diameter. The hole circularity and cylindricity were reduced compared to holes drilled under dry condition under all cutting parameters due to enhanced thermal stability during the drilling process. The current study aims to provide the scientific and industrial communities with the necessary knowledge on whether cryogenic bath cooling strategy provides better hole quality output compared to dry drilling and other cryogenic cooling strategies which were previously reported in the open literature.

show abstract

Section: Introductionmentioning

confidence: 99%

The effect of cryogenic machining of S2 glass fibre composite on the hole form and dimensional tolerances

Köklü

Morkavuk

Featherston

et al. 2021

Int J Adv Manuf Technol

View full text Add to dashboard Cite

show abstract

“…Due to its good mechanical and thermochemical properties, such as specific strength and corrosion resistance, as well as its low cost, it is widely used in the aerospace industry, deep-sea operations, medical equipment, and value markets. Compared with parts made by traditional forging processes, additive-manufactured parts usually have more prominent physical and mechanical properties, which increase the difficulty of machining [6]. However, additive manufacturing technology inevitably produces defects, such as dimensional errors, deformation and high residual stress and cracking [7][8][9][10], caused by layered and superimposed manufacturing, which cannot achieve the required accuracy, uniformity of material characteristics and surface quality.…”

Section: Introductionmentioning

confidence: 99%

Finite Element Analysis of the Milling of Ti6Al4V Titanium Alloy Laser Additive Manufacturing Parts

et al. 2021

View full text Add to dashboard Cite

This study aimed to analyze the defects of large residual stress in laser additive manufacturing metal parts by establishing a milling numerical simulation of Ti6Al4V titanium alloy thin-walled parts based on the Johnson-Cook constitutive model of Ti6Al4V titanium alloy, a modified Coulomb friction stress model, the physical chip separation criterion and other theories, combined with the finite element software ABAQUS. The influences of milling depth, initial temperature and milling speed on the forming quality of the formed part were analyzed. The results show that milling changes the residual stress distribution of the deposition layer, which can reduce or even change the residual tensile stress on the surface of the deposition layer produced by the additive manufacturing process into compressive stress, and the equivalent Mises stress decreases by 47% compared with the original forming surface. When the initial temperature increases from 20 °C to 400 °C, the maximum equivalent Mises stress of the milling surface decreases by 26%.

show abstract

“…In fact, machining operations are usually required to achieve the final geometrical tolerances and surface finish as well as improve in-service performances of the AM parts [ 10 ]. Among the AM metal alloys, Ti6Al4V titanium alloy is one of the most utilized for the production of high-value parts in both the aerospace and biomedical fields [ 11 ]. Compared to the conventionally manufactured parts, the use of AM indeed allows for the reduction of the mass of aircraft components, leading to lighter structures together with reduced costs, material wastage, and lead times [ 10 ].…”

Section: Introductionmentioning

confidence: 99%

“…However, the titanium alloys fall into the category of the so-called difficult-to-cut metals, because of their high strength and chemical reactivity to oxygen, together with low thermal conductivity, which leads to high temperatures in the cutting zone, affecting the part surface and sub-surface characteristics, which, in turn, strongly impact the part functional performances [ 13 , 14 ]. When compared to traditional manufacturing processed parts, the AM ones usually have higher mechanical properties that further negatively affect their machinability [ 11 ]. For this reason, in recent years, the issue of machining AM titanium alloys has grown in importance.…”

Section: Introductionmentioning

confidence: 99%

Turning of Additively Manufactured Ti6Al4V: Effect of the Highly Oriented Microstructure on the Surface Integrity

2021

View full text Add to dashboard Cite

Additive manufacturing processes induce a high orientation in the microstructure of the printed part due to the strong thermal gradients developed during the process caused by the highly concentrated heat source that is used to melt the metal powder layer-by-layer. The resulting microstructural anisotropy may have an effect on the post-processing operations such as machining ones. This paper investigates the influence of the anisotropy in turning operations carried out on laser powder bed fused Ti6Al4V parts manufactured with different scanning strategies. The machinability under both transverse and cylindrical turning operations was assessed in terms of surface integrity, considering both surface and sub-surface aspects. The effect of the different cooling conditions, that is flood and cryogenic ones, was studied as well. The outcomes showed that the microstructural anisotropy had a remarkable effect on the machining operations and that the cryogenic cooling enhanced the effect of the anisotropy in determining the surface integrity.

show abstract

Improvement of machinability of Ti and its alloys using cooling-lubrication techniques: a review and future prospect

Cited by 182 publications

References 165 publications

The effect of cryogenic machining of S2 glass fibre composite on the hole form and dimensional tolerances

The effect of cryogenic machining of S2 glass fibre composite on the hole form and dimensional tolerances

Finite Element Analysis of the Milling of Ti6Al4V Titanium Alloy Laser Additive Manufacturing Parts

Turning of Additively Manufactured Ti6Al4V: Effect of the Highly Oriented Microstructure on the Surface Integrity

Contact Info

Product

Resources

About