The grinding experiments of nickel-based superalloy samples were carried out, and the prediction model of state parameters based on back propagation neural network was constituted. The prediction accuracy of the model was 93.58%. ... As shown in Fig. 14, the surface milling texture before grinding distributed along the width direction …

This paper aims to assess the cutting performance of ultrasonic vibration-assisted milling (UVAM) technique and conventional milling (CM) in side milling of Ti–6Al–4 V. Tool trajectory and instantaneous chip thickness are calculated considering tool runout, vibration, and deflection. ..., and grinding GH4169 nickel-based alloy ...

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.

Almost any cutting fluid, or none, can be used in machining nickel alloys. In many applications, nickel alloys respond well to ordinary sulfurized mineral oil; sulfur imparts …

As nickel-based superalloys have heat and oxidation resisting capability, there are numerous applications of it in the field of marine and aerospace. This paper …

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 …

Table 1 summarizes the information collected as a function of the type of control system and the commercial control system used, the objective(s) set out for the control system, the manipulated and controlled variables, and a suite of quantitative metrics, including mill load, grinding media wear, power consumption, ore throughput, cyclone …

The detailed grinding surface integrity of nickel-based superalloys, including surface morphology, subsurface microstructure, deformation, and mechanical properties, …

Then a comprehensive review on the machinability of nickel alloys using different nanoparticles and base fluids while milling, turning, grinding, and drilling is …

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 …

The article describes the machining operations performed on nickel alloys, such as turning, planing and shaping, broaching, reaming, drilling, tapping and threading, milling, …

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

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 …

Superalloys based on nickel are extremely hard to machine, extremely robust at cutting temperatures, and extremely sensitive to the heat produced by conventional machining techniques such as Drilling, milling, boring, turning, cutting, and grinding are the most common conventional machining processes used in manufacturing [5].Because …

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 …

This investigation on machining and surface grinding was conducted by Met cut Research Associates Inc. of Cincinnati, Ohio, for The International Nickel Company, Inc. …

Nickel-catalyzed radical relayed reductive cross-coupling (A) Nickel-catalyzed dicarbofunctionalization of alkenes. (B) Traditional nickel-catalyzed reductive dicarbofunctionalization of alkenes. ... (Table 1) as model substrates and added them to a 1.5 mL stainless-steel milling jar with one grinding ball (stainless, diameter: 5.0 mm) in …

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

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.

Stirred milling of laterites offers possibilities for improving liberation and selective size reduction of soft nickel-bearing minerals in laterites. Batch grinding tests were performed in a Netzsch LME4 stirred mill on a siliceous goethitic (SG) nickel laterite sample (-2000 µm particle size) to evaluate the effect of operating conditions such as …

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 ...

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 …

According to the significant anisotropy of nickel-based single-crystal superalloy, a three-dimensional single-abrasive grinding model based on the Hill model was developed. In work, the change of the actual grinding thickness (ag) of abrasive is taken into account in establishing the model. In addition, a combination of theoretical …

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 …

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, …

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 …

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 ...

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 …

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 …

Nickel-based alloys are known to be difficult to cut material, which can cause high cutting forces and temperature rise which always leads to excessive tool wear. Traditional views hold the opinion that cutting temperature rise could lead to negative effects. However, milling under high temperatu...

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 …

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 ...

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 …

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 ...

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 …