Investigation of surface roughness, microhardness and white layer thickness in hard milling of AISI 4340 using minimum quantity lubrication

Hassanpour, Hamed; Sadeghi, M. H.; Amir, Rasti; Shajari, Shaghayegh

doi:10.1016/j.jclepro.2015.12.091

Cited by 83 publications

(33 citation statements)

References 32 publications

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“…In comparing these two cutting speeds and feed rates, the faster speed and rate result in slightly increased hardness values extending to a greater subsurface depth, as shown in Figure . Similar results were presented by Hassanpour et al, where subsurface microhardness was higher than the bulk after end milling AISI 4340 steel using microlubrication for all the cutting combinations. Yazid et al also indicated that the amount of subsurface microhardness change from machined surface to the bulk was less in microlubrication than using dry cutting.…”

Section: Resultssupporting

confidence: 89%

Microlubrication machining of 1018 steel: the effect of a biodegradable lubricant on the microstructural integrity

Shaikh¹,

Scharf

Boubekri

2017

Lubrication Science

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Microlubrication is a green machining technique that reduces the amount of cutting fluid during the machining process. Its effect on subsurface microstructural integrity is a very important aspect for the functionality of a machined component, but it is often neglected and requires advanced characterisation techniques. The focus of this study is to investigate the influence of microlubrication using a biodegradable vegetable oil‐based cutting fluid to characterise the subsurface microstructural integrity during end milling of AISI 1018 steel. Vickers microhardness was measured along the cross section of the machined component from the surface edge to inside the bulk, while transmission electron microscopy was conducted inside the subsurface deformation zone to quantify the dislocation densities. It was determined that increased dislocation densities near the workpiece edge resulted in increased microhardness with reduced tool wear. Thus, microlubrication machining is a sustainable green machining process that does not significantly compromise the subsurface integrity of the workpiece material. Copyright © 2017 John Wiley & Sons, Ltd.

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Section: Resultssupporting

confidence: 89%

Microlubrication machining of 1018 steel: the effect of a biodegradable lubricant on the microstructural integrity

Shaikh¹,

Scharf

Boubekri

2017

Lubrication Science

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“…In Figure 7 , Young’s modules under different coolant methods are all smaller than the standard Young’s module. Dry milling always produces the highest microhardness [ 38 ] caused by strong strain hardening and deformed layer that impacts on the elastic module [ 39 ]. This is the combination of a high strain gradient and thermal gradient.…”

Section: Resultsmentioning

confidence: 99%

Experimental Study on the Effects of Coolants on Surface Quality and Mechanical Properties of Micromilled Thin-Walled Elgiloy

Zhang

Xue

et al. 2018

Materials

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In this study, minimum quantity coolant/lubrication (MQCL) is found to have significant impact on the surface quality and mechanical properties of the micromilled thin-walled work piece that is the core component of an aeroaccelerometer. Three kinds of coolants were used in the micromilling process to analyze their effects on surface quality and mechanical properties of the component. The experiment results show that an appropriate dynamic viscosity of coolant helps to improve surface roughness. The high evaporation rate of the coolants can enhance the cooling performance. Comparing with the dry machining case, MQCL has better performance on improving tool wear, surface quality, and mechanical properties of the micromilled work piece. It yielded up to 1.4–10.4% lower surface roughness compared with the dry machining case in this experiment. The machined work piece with the best mechanical properties and the one with the worst mechanical properties appeared in the ethyl alcohol and the dry machining case, respectively. The reasons for deteriorating surface quality and mechanical properties in dry machining cases are also analyzed. For improving the micromilling process, the penetration and cooling effect of the coolants are more important. This paper gives references to obtain better service performance of the component by improving the micromilling process.

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“…Cooling methods based on very low amounts of coolants and lubricants, in comparison to dry cutting, enable the reduction of surface roughness [3][4][5], tool wear [6,7], cutting force [5,8], cutting temperature [9] and advantageous chip shape modification, as well as the [10] beneficial stress distribution [11,12]. Moreover, in order to improve the lubricating conditions of the MQL method, the nanoparticles made of silver, copper and molybdenum disulfide, as well as the carbon nanotubes are being provided [8,13].…”

Section: Introductionmentioning

confidence: 99%

Wear of carbide inserts during turning of C45 steel in dry cutting conditions and in presence of emulsion mist

Feldshtein

Wojciechowski

2017

E3S Web Conf.

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Abstract. This paper describes the wear features of indexable carbide P25 inserts when turning C45 steel with cutting speeds of 250450 m/min in dry cutting conditions and in the presence of an emulsion mist (MQCL method). As the active component of the emulsion mist 5%, the aqueous emulsion of EMULGOL concentrate was used. While analyzing the size, shape and formation dynamics of tool wear, the larger dimensions were found for dry cutting. The statistical analysis of results allowed calculating the dependencies to determine the wear rates. The SEM analysis revealed significant oxygen contents at the contact areas that are due to high temperatures in the cutting zone. When cutting with the emulsion mist the presence of phosphorus and copper entering in EMULGOL concentrate was fixed directly on the wear areas. It suggests the possibility of using compounds included in the emulsion mist to form AW and EP films at the contact areas in the cutting zone.

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Investigation of surface roughness, microhardness and white layer thickness in hard milling of AISI 4340 using minimum quantity lubrication

Cited by 83 publications

References 32 publications

Microlubrication machining of 1018 steel: the effect of a biodegradable lubricant on the microstructural integrity

Microlubrication machining of 1018 steel: the effect of a biodegradable lubricant on the microstructural integrity

Experimental Study on the Effects of Coolants on Surface Quality and Mechanical Properties of Micromilled Thin-Walled Elgiloy

Wear of carbide inserts during turning of C45 steel in dry cutting conditions and in presence of emulsion mist

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