Analysis of the Chip Geometry in Dry Machining of Aeronautical Aluminum Alloys

Vilches, Francisco Javier Trujillo; Hurtado, Lorenzo Sevilla; Fernández, Francisco Martín; Gamboa, Carolina Bermudo

doi:10.3390/app7020132

Cited by 27 publications

(13 citation statements)

References 28 publications

(20 reference statements)

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“…This resulted in the application of more efficient techniques, such as MQL (minimum quantity lubricant), or the total suppression of these substances (dry machining) [11][12][13][14][15]. In addition, aluminum alloys are frequently used hybridized with other materials, such as carbon fiber-reinforced polymers (CFRP) or titanium, to form structural elements, such as fiber metal laminates (FML) [16]. In those cases, the chip recycling (mixture of metal, carbon fiber, and cutting fluids) becomes complex and expensive.…”

Section: Introductionmentioning

confidence: 99%

Cutting Speed and Feed Influence on Surface Microhardness of Dry-Turned UNS A97075-T6 Alloy

et al. 2020

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In this work, an analysis of the cutting speed and feed influence on surface roughness and microhardness of UNS A97075-T6 alloy, turned under dry conditions, was carried out. The results were compared before and after a corrosion process. The influence of these cutting parameters on each of these variables was analyzed, as well as the possible interrelation between them. The microgeometrical deviations showed a general trend to increase with feed. However, no significant modifications were observed as a function of the cutting speed. This trend was softer after the corrosion process, due to the surface alterations produced by pitting corrosion, which resulted in higher dispersion of the experimental data. In addition, a surface microhardness increment was observed in all samples, after machining and before corrosion, regardless of the cutting parameter values. The experimental results revealed that the mechanical effects, produced by the feed, should not be neglected against the thermal effects, produced by the cutting speed, within the range of the tested cutting speed. Finally, the corrosion process negatively affected the microhardness, but it was not possible to establish a direct relationship between the cutting parameters, surface roughness, and microhardness after a corrosion process.

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Section: Introductionmentioning

confidence: 99%

Cutting Speed and Feed Influence on Surface Microhardness of Dry-Turned UNS A97075-T6 Alloy

et al. 2020

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“…Although the literature contains an important number of experimental works with regard the machining of hybrid components, only some of them addressed hybrid components based on magnesium. Most studies focused on machining processes [105][106][107][108][109][110][111][112][113] and tried to find the optimal combination of machining conditions and lubrication/cooling systems by means of experimental tests, taking the surface roughness required in a particular industry sector or application as a response variable. Others dealt with friction and wear between contact materials [114,115], the effects of pre-treatments on the adhesion of hybrid materials [116], innovative techniques for forming these types of components [117,118], or identification of some of the most prominent issues.…”

Section: Introductionmentioning

confidence: 99%

Repairing Hybrid Mg–Al–Mg Components Using Sustainable Cooling Systems

et al. 2020

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This paper focused on the maintenance or repair of holes made using hybrid Mg–Al–Mg components by drilling, using two sustainable cooling techniques (dry machining and cold compressed air) and taking surface roughness on the inside of the holes as the response variable. The novelty of the work is in proving that the repair operations of the multi-material components (magnesium–aluminum–magnesium) and the parts made of aluminum and magnesium (separately) but assembled to form a higher component can be done simultaneously, thus reducing the time and cost of the assembly and disassembly of this type of component. The study is based on a design of experiments (DOE) defined as a product of a full factorial 23 and a block of two factors (3 × 2). Based on our findings, we propose that the analyzed operations are feasible under sustainable conditions and, in particular, under dry machining. Also, the results depend on the machining order.

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“…The geometry of the specimens raised in the present study is a natural evolution of the geometries and materials previously studied separately that have just been mentioned. In addition, the selected materials, both independently and jointly, have been used by other researchers in different investigations with good results in the field of study [61][62][63][64][65][66][67][68][69][70][71]. The geometry of the specimen [45] (Figure 2) and the composition of these alloys (Table 3) …”

Section: Methodsmentioning

confidence: 99%

Experimental Study for Improving the Repair of Magnesium–Aluminium Hybrid Parts by Turning Processes

Rubio

Villeta

Valencia

et al. 2018

Metals

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Abstract:One of the lightest metallic materials used in the aeronautics, aerospace, and automotive industries, among others, is magnesium, due to its excellent weight/strength ratio. Most parts used in these industries need to be made of materials that are rigid, strong, and lightweight, but sometimes the materials do not simultaneously satisfy all of the properties required. An alternative is to combine two or more materials, giving rise to a hybrid component that can satisfy a wider range of properties. The pieces machined in these industrial fields must satisfy stringent surface roughness requirements that conform to the design specifications. This work shows an experimental study to analyse the surface roughness reached in hybrid components made up of a base of magnesium alloy (UNS M11917) and two inserts of aluminium alloy (UNS A92024) obtained by turning. Its purpose is to determine the influence of the factors and their possible interactions on the response variable, the surface roughness Ra. The study is carried out using a design of experiments (DOE). A product of a full factorial 2 3 and a block of two factors 3 × 2 was selected. The factors identified as possible sources of variation of the surface roughness are: depth of cut, feed rate, spindle speed, type of tool, location with respect to the specimen (LRS), and location with respect to the insert (LRI). Data were analysed by means of the analysis of variance (ANOVA) method. The main conclusion is the possibility to carry out the repair and maintenance of parts of magnesium-aluminum hybrid components by dry turning; that is, without cutting fluids and, therefore, in the most sustainable way that the process can be carried out. In addition, different combinations of cutting parameters have been identified that allow these operations to be carried out in an efficient manner, reducing mechanization times and, therefore, also the direct and indirect costs associated with them.

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Analysis of the Chip Geometry in Dry Machining of Aeronautical Aluminum Alloys

Cited by 27 publications

References 28 publications

Cutting Speed and Feed Influence on Surface Microhardness of Dry-Turned UNS A97075-T6 Alloy

Cutting Speed and Feed Influence on Surface Microhardness of Dry-Turned UNS A97075-T6 Alloy

Repairing Hybrid Mg–Al–Mg Components Using Sustainable Cooling Systems

Experimental Study for Improving the Repair of Magnesium–Aluminium Hybrid Parts by Turning Processes

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