Ultrasonic-Assisted Dry Creep-Feed Up-Grinding of Superalloy Inconel738LC

Abdullah, Amir; Farhadi, Ahmad; Pak, Abbas

doi:10.1007/s11340-011-9557-1

Cited by 32 publications

(10 citation statements)

References 9 publications

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“…Accordingly, sharpened grits penetrate the material more easily, which results in reductions in the cutting forces. Abdullah et al [19] considered the effect of imposing an additional speed component to an individual grain by horizontal ultrasonic vibrations parallel to the workpiece. They found that by means of oscillation, the grain attacks the surface at a larger angle of engagement, that is, a deeper engagement with higher active speed happens in comparison to conventional grinding, as is shown in Figure 7.…”

Section: Resultsmentioning

confidence: 99%

Effect of Water-Based Nanolubricants in Ultrasonic Vibration Assisted Grinding

Molaie

Zahedi

Âkbari

2018

JMMP

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Currently, because of stricter environmental standards and highly competitive markets, machining operations, as the main part of the manufacturing cycle, need to be rigorously optimized. In order to simultaneously maximize the production quality and minimize the environmental issues related to the grinding process, this research study evaluates the performance of minimum quantity lubrication (MQL) grinding using water-based nanofluids in the presence of horizontal ultrasonic vibrations (UV). In spite of the positive impacts of MQL using nanofluids and UV which are extensively reported in the literature, there is only a handful of studies on concurrent utilization of these two techniques. To this end, for this paper, five kinds of water-based nanofluids including multiwall carbon nanotube (MWCNT), graphite, Al2O3, graphene oxide (GO) nanoparticles, and hybrid Al2O3/graphite were employed as MQL coolants, and the workpiece was oscillated along the feed direction with 21.9 kHz frequency and 10 µm amplitude. Machining forces, specific energy, and surface quality were measured for determining the process efficiency. As specified by experimental results, the variation in the material removal nature made by ultrasonic vibrations resulted in a drastic reduction of the grinding normal force and surface roughness. In addition, the type of nanoparticles dispersed in water had a strong effect on the grinding tangential force. Hybrid Al2O3/graphite nanofluid through two different kinds of lubrication mechanisms—third body and slider layers—generated better lubrication than the other coolants, thereby having the lowest grinding forces and specific energy (40.13 J/mm3). It was also found that chemically exfoliating the graphene layers via oxidation and then purification prior to dispersion in water promoted their effectiveness. In conclusion, UV assisted MQL grinding increases operation efficiency by facilitating the material removal and reducing the use of coolants, frictional losses, and energy consumption in the grinding zone. Improvements up to 52%, 47%, and 61%, respectively, can be achieved in grinding normal force, specific energy, and surface roughness compared with conventional dry grinding.

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Section: Resultsmentioning

confidence: 99%

Effect of Water-Based Nanolubricants in Ultrasonic Vibration Assisted Grinding

Molaie

Zahedi

Âkbari

2018

JMMP

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“…In recent decades, applying ultrasonic vibrations to drilling, grinding, and especially turning has been researched extensively, 1 and some advantages such as lower cutting forces 2 and probable lower risks of thermal damage even for working under dry conditions 3 have been reported for them. Zhou et al 4 experimentally showed that compared with conventional turning (CT), the cutting performance, in terms of cutting force, surface finish, and tool life, was improved by applying ultrasonic vibration to the cutting tool.…”

Section: Introductionmentioning

confidence: 99%

Research on the importance of tool–workpiece separation in ultrasonic vibration–assisted milling

Zarchi

Razfar

Abdullah

2016

Proceedings of the Institution of Mechanical Engineers, Part B:

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In recent years, various reasons for improvement of performance and efficiency in ultrasonic vibration-assisted machining processes have been reported, which were mostly descriptive and without sufficient analytical and empirical proofs. Among the different machining processes, the least amount of experimental data and analytical relations exist about ultrasonic-assisted milling. In this article, for the first time in ultrasonic-assisted milling, we have determined the times of tool-workpiece engagement and their separation from each other in each vibration cycle and then investigated the influence of vibration amplitude and cutting speed on tool-workpiece effective engagement in ultrasonic-assisted milling. Contrary to ultrasonic-assisted turning, cutting time in each vibration cycle in ultrasonic-assisted milling is different from each other. With the aid of comprehensive experiments at tool-workpiece engagement angles smaller than 90°, we have proved that the main reason for average cutting force decrease in ultrasonic-assisted milling compared with conventional milling is the separation of tool and workpiece that occurs in a portion of each vibration cycle, and other factors such as change of friction behavior have less importance. At investigated tool-workpiece engagement angles, experimental and analytical results agree with each other.

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“…The subject literature includes numerous publications concerning the operations of grinding nickel-based alloys using grinding wheels with Al 2 O 3 grains (white fused alumina 99A [2,9,[17][18][19][20][21], microcrystalline sintered corundum [18,[22][23][24]), SiC [9,17], cubic boron nitride cBN [2,9,14,17,18,[25][26][27][28][29][30][31], and diamond grains [2,25,26,28,29]. When analyzing bonds used in grinding wheels meant for grinding nickel-based alloys, it may be observed that resin bonds are characterized by too low a profile stability [29].…”

Section: Introductionmentioning

confidence: 99%

“…The cBN grains are characterized in most cases by more favorable grinding results and a longer durability period [26,29]. In flat or internal cylindrical grinding processes, in which there are no such high expectations concerning the grinding wheel profile durability, grinding wheels with ceramic bond are used most often [2,9,10,14,[17][18][19][20][21][22][23][24]31].…”

Section: Introductionmentioning

confidence: 99%

Effect of vitrified bond microstructure and volume fraction in the grinding wheel on traverse internal cylindrical grinding of Inconel® alloy 600

Nadolny

Herman

2015

Int J Adv Manuf Technol

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The following article examines the influence of glass-crystalline bond in grinding wheels with grains made from microcrystalline aluminum oxide, and specifically its effect upon the values of selected operational indicators in the process of traverse internal cylindrical grinding of surfaces made from Inconel® alloy 600. The experimental test results obtained showed that changes in the bond phase composition, including its microstructure and volume share in the grinding wheel, has significant influence upon the workpiece surface roughness, grinding power, and other basic phenomena within the grinding zone. It was proven that the heat and physicalmechanical properties of the bonds have considerable influence on the mechanism of the grinding wheel components (abrasive grains and bond bridges) wear mechanisms. The phenomena occurring in the area of contact between the grinding wheel active surface and the workpiece surface requires on, among other things, the temperature at which the bond softens, initial bond hardness, the critical coefficient of grain strain intensity K Ic , the crystalline phases generated, and the volumetric share of the amorphous and crystalline phases in the bridges binding the abrasive grains.

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Ultrasonic-Assisted Dry Creep-Feed Up-Grinding of Superalloy Inconel738LC

Cited by 32 publications

References 9 publications

Effect of Water-Based Nanolubricants in Ultrasonic Vibration Assisted Grinding

Effect of Water-Based Nanolubricants in Ultrasonic Vibration Assisted Grinding

Research on the importance of tool–workpiece separation in ultrasonic vibration–assisted milling

Effect of vitrified bond microstructure and volume fraction in the grinding wheel on traverse internal cylindrical grinding of Inconel® alloy 600

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