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Modifying the microstructure and phases of HEAs has proven to be an effective strategy for enhancing their properties. Consequently, one of the most promising techniques for obtaining these alloys is MA. This process involves loading blended elemental powders or prealloyed powders, along with a milling medium, into a high-energy ball mill.
The flaky FeSi alloy particles prepared through ball-milling and annealing can be promising candidates for EMA application at 1–4 ... Since the diffraction peak width increases persistently all through the ball-milling process despite the suspended grain refining, the broadening of diffraction peaks at the latter stage is believed attributed ...
Mg-based alloys must be dehydrogenated at high pressure and temperatures, limiting their practical application. In this paper, Nd5Mg41Ni alloy was prepared by vacuum melting, and the as-cast alloy was ball milled for 5 h, 10 h, 15 h, and 20 h. The effect of ball milling time on the microstructure and hydrogen storage properties of the alloy was systematically studied. The …
In pursuit of unlocking the full potential of Ti–6Al–4V titanium alloy known for its exceptional strength-to-weight ratio, corrosion resistance, and stability at elevated …
Mechanical alloying is a ball milling process where a powder mixture placed in the ball mill is subjected to high energy collision from the balls. The process is usually carried out in an inert …
In this paper, Mg 2.3 Y 0.1 Ni + x wt.% graphene (x = 1, 3, 5, 7) composite hydrogen storage alloys were fabricated by mechanical ball milling of Mg 2.3 Y 0.1 Ni alloy powder and graphene. The experimental results show that the phases of the composite alloy consist mainly of Mg 2 Ni, Mg, MgNi 2 and Ni 3 Y phases, and graphene tends to be distributed at the edges of the alloy, …
The elemental powder mixtures with the nominal composition of Nb-20Ti-15Si-5Cr-3Hf-3Al (at. %) were ball milled via QM-1SP4-CL planetary ball-milling machine at different rotating speed (300, 400 and 500 rpm). The corresponding mechanical alloying behaviors of the powder blends, including the evolutions of their phase constituent, microstructure, size and morphology, have …
Figure 4 demonstrates the EDS micrograph of nanocrystalline TiAlV alloy during 20 h of milling. The repartition of Ti, Al, and V elements is uniform. As seen, there is some contamination of iron worn off from the milling balls during the milling process due to ball collision. The appearance of TiAlV alloy powder was previously formed at 20 h.
The ball milling time was 5, 10, 15, 20 and 30 h, respectively. The as-cast alloy is defined as ball milling time of 0 h. The ball milling was paused for 30 min after running every 3 h for the purpose of dissipating heat and reducing the cold welding of alloy powders during ball milling process.
The ball-end structure and motion of the tool together determine the machined surface during ball-end milling process will have residual material defects in the shape of micro-protrudes. This type of defect is inevitable when using ball-end milling cutter for machining. ... Yang D, Liu Z (2015) Surface topography analysis and cutting parameters ...
The hydrogen storage properties of the Mg 90 Ni 5 Y 5 alloy were studied, which was prepared by vacuum electromagnetic induction melting and ball milling. The microstructure and phase evolution of the ball-milled alloys during the process of hydrogen absorption and desorption were characterized by scanning electron microscopy (SEM), transmission electron microscopy …
To improve the cutting performance when cutting hard alloys and achieve reasonable optimization of micro-texture parameters, this paper proposes a sinusoidal micro-textured tool, with four parameters set as micro-textured spacing, period, width, and amplitude. Establish three-dimensional models of non-micro-textured and micro-textured milling tools …
The Si-based alloy powders were manufactured by mechanical ball milling process. The ball milled Si-based alloy powders were incorporated graphite as a bufferring matrix to depress the volumetric ...
The pre-milling of Cr was performed in a high-energy ball mill (Fritsch Pulverisette 4). The pre-milling conditions were 250 rpm for the rotating speed of the sun wheel, 250 rpm for the relative speed of the grinding vial and 28 h duration with 2 h pauses every 7 h. Pauses prevent the powder from agglomerating into large particles.
During the ball milling process, Ni powders are milled in a planetary mill for short time nickel particles are repeatedly flattened, fractured and welded (Fig. 1). A balance between coalescence and fragmentation is achieved. ... J. Alloys Compd., 432 (2007), pp. 103-110. View PDF View article View in Scopus Google Scholar [8]
In this work, the evolution of the size and morphology of Fe-Ga particles during vibration ball milling is documented and discussed. Low intensity (12 Hz) and high intensity (20 Hz) of milling with different ball-to-powder ratios (2:1 and 5:1) are used. A systematic study of the effect of various milling parameters on the size and morphology of particles is carried out …
The XRD pattern of Ti–N alloys displays only a Ti diffraction peak, indicating that the alloy composition is not affected by the ball-milling process. Ti–N alloys also effectively avoid forming a brittle ceramic phase when the content of light elements is greater than 2 at.%, preventing the sample from becoming brittle in terms of ...
High energy ball milling is the basic MA process used for fabricating a-MgNi alloys. The composition of alloys, milling modes and milling parameters have substantial effect on the amorphization process and electrode properties of Mg-based hydrogen storage alloys. ... Milling parameters for formation of MgNi amorphous alloy in milling process of ...
Nevertheless, parameter factors, such as the type of ball milling, ball-to-powder ratio (BPR), rotation speed, grinding period, size and shape of the milling media, and process control agent (PCA ...
Ball milling is a convenient way to disperse carbon nanotubes (CNT) or GNP in metal matrix. It has been widely used for CNT reinforced metal composites, such as Cu and Al alloys [15], [16], [17].However, ball milling is not considered as an efficient way to disperse CNT in metal matrix, because it is hard to balance the dispersion and breakage during the milling …
This process involves loading blended elemental powders or prealloyed powders, along with a milling medium, into a high-energy ball mill. The continuous fracturing and cold …
Commercial powders of magnesium were processed by high-energy ball milling (HEBM) using a two-stage composite process. The microstructural and morphological evolution of the powders was studied using scanning electron microscopy (SEM), energy-dispersive spectrometry (EDX), and X-ray diffraction (XRD). From the results obtained, it was determined …
Ball milling is a grinding method that grinds nanotubes into extremely fine powders. During the ball milling process, the collision between the tiny rigid balls in a concealed container will …
Effect of Ni and Zr on the microstructural evolution of Ti-based alloys during ball-milling. Tibor Ferenczi. 2017, Journal of Non-Crystalline Solids. See full PDF download Download PDF.
The synthesis process of Mg–Ti alloys with a BCC (body centered cubic) structure by means of ball milling was studied by X-ray diffraction and various microscopic techniques. The morphology and crystal structure of Mg–Ti alloys changed with increase of …
The ball milling process of 250−300 rpm ball milling speeds and 5−7 hours ball milling times are worth recommending based on α, which causes an increase by 95–100 % in σ yc and a decrease by 30–35 % in CTE compared with 2024Al alloy respectively.
Optimized parameters for the milling process were established: a ball milling speed of 250 r/min, ball milling time of 2 h and ball-to-powder ratio of 2:1. ... In this paper, to better …
In order to further reduce the height of burrs on the surface of the workpiece when milling titanium alloy with ball-end milling cutters and optimize the quality of the workpiece, this article ...
Tables 2, 3, and 4 depict the chemical composition, and physical and mechanical properties of Ti6Al4V respectively. The complete experimental set up is shown in Fig. 1.The ball end milling experiments were conducted on a three-axis vertical milling center (Fig. 1a). The detailed specifications of the three-axis vertical milling machine center is shown in Table 5.
influence of different milling atmospheres (air, argon, nitrogen) on the high-energy ball-milling process when milling an Al alloy with SiC particles. The investigations show that the reaction of the ground material with air, when rinsed with air, changes the milling behavior of the aluminum powder significantly.
The AlTiVCrSi HEA powder was prepared by high-energy ball milling of elemental Al, Ti, V, Cr, and Si powders (purity > 99 wt%). MA was conducted using a high-energy vibrating ball mill with a water-cooled jacket (Super Misuni NEV-MA8, Nissin Giken, Japan) [47, 48].The raw powders with an equiatomic ratio were placed in a stainless steel container filled with zirconia …
Mechanochemical synthesis (MCS); that is, chemical reactions induced by high-energy ball milling, is one of promising routes for the synthesis of different classes of materials including metals, oxides, salts, organic compounds, etc. in various combinations [1], [2].Mechanochemical reactions involving displacement reactions between a reactive metal and …
Li 4.4 Ge x Si 1−x alloys were prepared by use of a high-energy ball-milling process. The Li 4.4 Ge x Si 1−x alloys formed a solid solution over the whole composition range of 0≤x≤1. Those alloys were isomorphic with an Li 15 Ge 4 crystalline phase that had a D8 6 structure belonging to a space group I4¯3d.The lattice constants of the alloys were increased …
The study results showed that the ball milling process was effective in breaking down the e-waste swarf and liberating valuable metals, such as silver, copper, and gold. The authors also found that the ball milling process is environmentally friendly compared to traditional methods, as it reduces the use of chemicals and produces less waste.
The Si-based alloy powders were manufactured by mechanical ball milling process. The ball milled Si-based alloy powders were incorporated graphite as a bufferring matrix to depress the volumetric change of an alloy electrode. We investigated structural and electorchemical properties of the Si-based alloy anodes.