Temperature modeling of creep-feed grinding processes for nickel …
Grinding samples made of IN718, a commonly used nickel-based superalloy for turbine components, were produced for the experiments. The grinding samples were prepared in the form of simple blocks with a width of 30 mm, a length of 50 mm and a height of 14 mm, shown in Fig. 2 (b). Download : Download high-res image (308KB)
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Mechanical Milling: a Top Down Approach for the Synthesis …
By utilizing mechanical milling various kind of aluminium/ nickel/ magnesium/ copper based nanoalloys, wear resistant spray coatings, oxide and carbide strengthened aluminium alloys, and many other nanocomposites have been synthesized in very high yield. ... The grinding of brittle mineral powders to achieve fine particles for …
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Investigation of surface integrity in grinding of nickel …
The detailed grinding surface integrity of nickel-based superalloys, including surface morphology, subsurface microstructure, deformation, and mechanical properties, …
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Kinetics of Dry-Batch Grinding in a Laboratory-Scale Ball …
Mill discharges were marked through 5 grinding times (0.5; 1; 1.5; 3.5; 7.5 min). This way, each sample was dumped from the mill, and then it went through a grain size analysis by means of dry sieving. In addition, after completing the grinding time, Sn, Ta and Nb content was determined for
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Machining Nickel and Nickel Alloys | A Guide from …
Nickel alloys work harden rapidly, and the high pressures produced during machining cause a hardening effect that slows further machining and may also cause warping in small parts. Using cold-drawn stress … See more
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Electrochemical deep grinding of cast nickel-base …
This paper focuses on the research of electrochemical deep grinding (ECDG) of cast nickel-based superalloy. The effects of abrasive particle size, cathode rotational speed and other processing parameters on the machining process were studied experimentally. The following conclusions could be drawn: 1.
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Grinding subsurface damage mechanism of nickel-based …
When the subsurface reaches internal stress balance f + div ∑ = 0, the shear force is ν and the internal force is 1 − 2 ν.. With the development of technology, a grinding speed of v s = 25 m/s and grinding depth of a p = 60 μm can result in an effective removal of nickel-based superalloy DD5.. During grinding, the grinding depth is directly …
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Milling Mechanism and Chattering Stability of Nickel-Based …
Nickel-based superalloy Inconel 718 is widely used in the aerospace industry for its excellent high-temperature strength and thermal stability. However, milling Inconel 718 presents challenges because of the significantly increased cutting force and vibration, since Inconel 718 is a typical difficult-to-machine material. This paper takes the …
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Investigation of electrochemical mill-grinding using abrasive …
Electrochemical mill-grinding (ECMG) combines electrochemical milling and electrochemical grinding in one processing procedure, and can be used for machining difficult-to-machine alloys. ... (2017) Single and multiobjective optimization of Inconel 718 nickel-based superalloy in the wire electrical discharge machining. Int J Adv Manuf …
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Stirred milling of siliceous goethitic nickel laterite-batch grinding …
Tong et al. (2012) used this same sample of SG nickel laterite to investigate the effects of selective grinding and subsequent screening on upgrading the Ni content of this material. Batch tests ...
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Process parameter optimization and anisotropy sensitivity …
2.3 Abrasive belt selection. The appropriate tool is half of the work. Park et al. [] studied the tool wear of coated and uncoated carbide inserts in the milling process of Inconel 718 under various lubrication and cooling methods.Li et al. [] considered the wear characteristics and failure modes of tools with different coating materials when milling …
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Milling optimization of GH4169 nickel–based superalloy
The surface quality of machining will greatly affect the service life of components. In this paper, to reduce the surface roughness and cutting force of nickel-based superalloy during machining, the milling parameters of GH4169 nickel-base superalloy under micro-lubrication conditions were optimized. Based on the response …
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A study on the grinding subsurface metamorphic layer
To conduct the single-factor experiment of plane groove grinding on nickel-based single crystal superalloy DD5, we selected the grinding wheel speed (v s), grinding depth (a p), and feed rate (v f) as per the experiment layout presented in Table 4. We utilized a low-speed wire cutting machine to slice the processed workpiece into a …
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Machining of Nickel and Nickel Alloys
The article describes the machining operations performed on nickel alloys, such as turning, planing and shaping, broaching, reaming, drilling, tapping and threading, milling, …
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MACHINING NICKEL AND NICKEL ALLOYS (INCLUDING …
Nickel alloys work harden rapidly, and the high pressures produced during machining cause a hardening effect that slows ... Water-base fluids are preferred in high-speed turning, milling, and grinding because of their greater cooling effect. These may be soluble oils or chemical solutions. Except for grinding, which depends almost entirely on ...
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A Review of the Grinding Media in Ball Mills for Mineral …
The size of 30 mm was optimum for raw materials of −0.45 + 0.15 mm and −0.15 mm. The optimal ball size distribution was 12 mm (40%), 20 mm (40%), 32 mm (10%), and 40 mm (10%) for dry fine-grinding of calcite ore. Finer ball loads were unable to break coarser particles nipped in the feed.
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Experimental study on micro-grinding force and subsurface …
Nickel-based single crystal superalloy has no grain boundary, which leads to the removal mechanism difference between single crystal material and polycrystalline material. Firstly, the removal mechanism of grinding nickel-based single crystal superalloy is analysed. Then, the developed prediction model of the tangential force F t and the …
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General Guide to Machining Nickel-Iron Alloys from Ed …
Nickel-Iron Alloys. 769 Susquehanna Avenue, Franklin Lakes, NJ 07417 • phone 201.891.4003. 10537 Humbolt Street, Los Alamitos, CA 90720 • phone 562.431.2568. The Nickel-Iron Alloy Family generally includes INVAR, KOVAR®, Alloys 42, 46, 48, and 52, Alloy 42-6 and the magnetic shielding alloys such as MuMetal.
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Experimental study on grinding surface properties of nickel …
Nickel-based single crystal superalloy DD5, a typical difficult-to-machine material, is an important material for blades of aero-engine and gas turbine. The major characteristic of single crystal material from polycrystalline material is that the single crystal material shows significant anisotropy within the material. In order to investigate the …
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Tool Wear in Nickel-Based Superalloy Machining: An …
Through grinding experiments of nickel-based superalloys, the authors found that adding a small amount of nanomaterials in the vitrified bond as a modifier can improve the performance of the vitrified …
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Study on chip formation in grinding of nickel-based …
Based on the variation of the actual cutting depth during the grinding process, a 3D finite element simulation model for grinding nickel-based superalloy GH4169 with single abrasive was initially constructed. Then, the morphological evolution of the grinding chips during the grinding process was studied. In addition, the effect of the …
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Grinding subsurface damage mechanism of nickel-based …
In comparison to dry milling, NMQL milling forces exhibited a significant reduction in all three dimensions. ... Effect of grinding wheel speed on self-sharpening ability of PCBN grain during grinding of nickel-based superalloys with a constant undeformed chip thickness. Wear, 426–427 (2019), pp. 1573-1583, …
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General Guide to Machining Nickel-Iron Alloys from Ed …
General Guide to machining Nickel-Iron Alloys such as Invar, Super Invar, Kovar, Alloy 42, Alloy 46, Alloy 48, and Alloy 52 including recommended tools, lubricants, methods for …
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Traditional and non-traditional machining of nickel-based superalloys
Machining was performed on Waspaloy, and residual stresses induced on fatigue resistance has been analysed. SEM analysis was carried out, which shows crack initiation. Aspinwall et al. [27] conducted the grinding process for nickel-based superalloy Udimet 720. Profiled CBN and diamond grinding wheels selected to measure the tool …
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Study on the removal mechanism in multi-abrasive micro-grinding …
Based on the variation of the actual cutting depth during the grinding process, a 3D finite element simulation model for grinding nickel-based superalloy GH4169 with single abrasive was initially ...
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Research on sub-surface recrystallization of single crystal nickel
The micro-structure/parts of single crystal nickel-based superalloy materials are extensively used in high temperature environments. The recrystallization mechanism of the machined workpiece sub-surface is explained through energy storage model. A micro-milling experiment of single crystal nickel-based superalloy DD98 was performed by …
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Investigation of surface integrity in laser-assisted machining …
However, due to specifics of Nickel-based superalloys, i.e. nearly constant strength under a critical high-temperature region, to soften the surface layer in LAMill process significant and uniform heating of the workpiece is needed in a well-defined volume. ... A milling cutter (SECO high feed mill R217.21-3232.0-LP06.4A) with a diameter of 32 ...
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Feasibility and tool performance of ultrasonic
For milling-grinding tests, the ER20 ultrasonic vibration tool holder was used. Before milling-grinding tests, the ultrasonic vibration frequency and amplitude were measured with an LV-S01 Single-Point Laser Doppler Vibrometer (SPLDV), as shown in Fig. 5.The vibration amplitude was adjusted by changing the tool overhang length or tool …
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Stirred milling kinetics of siliceous goethitic nickel laterite for
The kinetics of batch wet grinding of nickel laterites with feed sizes of 2.38–1.68, 1.68–1.18, 1.18–0.85, 0.85–0.6, ... After grinding, the product slurry was transferred from the stirred mill to a wet screen. The grinding products were collected according to size fractions. Selected samples were sent to Acme, a local commercial ...
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Fabrication of homogeneous nanosized nickel powders
To overcome these problems, we used mechanical milling to prepare a nanosized nickel powder because milling provides high yields. We evaluated thermal shrinkage of our new powder and a commercial powder during sintering. ... Fig. 2 (d) shows the grinding results obtained when the disc rotated at 500 rpm and zirconia balls 1.0 ф …
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