Flat products of carbon nanotubes (CNTs) reinforced Al matrix composites were fabricated using flake powder metallurgy via shift-speed ball milling and hot-rolling. The evolution of CNTs during preparation and the final distribution in the Al matrix were investigated, and the effect of CNT content on mechanical properties were discussed. …

Ultrasonic surface rolling processing (USRP) is a new method to improve the fatigue performance of titanium alloy, and repeated processing pass is an important factor that affects its strengthening …

The ball milling (BM) of blended Ni and Cr elemental powders was carried out in a Simoloyer performing on high energy scale mode at maximum production to obtain a nanostructured Ni 20Cr alloy.

Cold working is the process of metal forming in which the deformation of metal occurs below its recrystallization temperature. In most cases, We perform cold working of metal at room temperature. ...

In the present study, a 304 stainless steel was deformed at different temperatures of room temperature (cold rolling) and 200 °C (warm rolling) for elucidating the distinct deformation mechanisms ...

The corrugated bonding interface formed in the process does not include an intermetallic phase, but grain refinement of the interface is observed after the CFR …

Then, by taking steel-ball rolling elements of the B7008C angular contact ball bearing as an example, a completed 3D elastic-plastic FE model of cold HR forming process was established under SIMUFACT software environment. Furthermore, the deformation characteristics in HR process were discovered, including the forming process, evolution

Then, the microstructure of bearing ring is studied by the electron backscatter diffraction technique. Furthermore, the microstructure changes in cold ring …

Global warming now days is an important issue over the world. To reduce the effect of global warming high strength structural steels are required to develop which will able to make safe body white future vehicle. In this matter advanced thermomechanical treatments of steel play a vital role. In present context, a repeated warm rolling, cold …

The numerical model of the high-energy ball milling attritor is built using Solidworks, whereas EDEM, a commercially available DEM code by DEM Solutions Inc.,[] is used for simulation.Two different models are considered in the simulation, as shown in Figure 1.The first model (Figure 1(a)) contains a central shaft with 5-layer impellers. The …

Analysis of Edge Drop on Strip Due to Effect of Rolling Forces Distribution in Combination with Plastic Deformation of Bur Rolls in 4-High Cold Mill December 2023 DOI: 10.20944/preprints202312.1402.v1

Due to the complexity of investigating deformation mechanisms in helical rolling (HR) process with traditional analytical method, it is significant to develop a 3D finite element (FE) model of HR process. The key forming conditions of cold HR of bearing steel-balls were detailedly described. Then, by taking steel-ball rolling elements of the …

The effect of high energy milling and cold rolling on the BCC solid solution TiV1.6Mn0.4 was investigated. The as-cast alloy presented a nanocrystalline structure with a crystallite size of 17 nm.

Several plastic deformation mechanisms such as cold working, rolling, work hardening could cause such effect [31]. Thus, such plastic deformation mechanism causes flake powder morphology illustrated on SEM images (Fig. 4 c) as well as texture formation and an increment in crystallite size [75]. Download: Download high-res image …

Energy method is an essential theoretical approach to analyze plastic forming, which is widely used in rolling process. An analysis model for vertical rolling process is established according to energy theory. By using global weighted method firstly, the 3D continuous velocity field, strain rate field and the corresponding power functional …

The cold welding effect is particularly pronounced in ductile materials like ZVI, where repeated impacts lead to the formation of larger clusters. ... in SSA expected from theoretical calculations when transforming spherical iron powder into flake-like iron through plastic deformation during ball milling (Fig. S5). This suggests that the ...

Angular location of the ball during the impact with the trailing edge (rad) ... S., Muzakkir, S.M. & Khanam, S. On the Importance of Modeling Ball Raceway Impact Force for Evaluating the Plastic Deformation at Spall Edge of Rolling Element Bearing: Theoretical Modeling. J. Vib. Eng. Technol. 12, 1309–1322 (2024). https://doi.org …

During milling, powder particles are trapped between the colliding balls and undergo repeated severe plastic deformation and fracture processes, leading to the incorporation of lattice defects and ...

The high energy ball milling of Ni and Ni-5 wt%Cu was studied and the following are the major conclusions. a. The XRD studies revealed an increase, and subsequent decrease in I 200 /I 111 ratio during ball milling of Ni-5 wt%Cu powders as well as in Ni with lower BPR = 4:1. b. Flakiness of powders increases with an increase in …

We compared cold rolling for 5, 12, and 25 rolling passes in the air with ball milling in argon for 30 and 60 min. Results show that 15 min of ball milling had a positive effect on the first ...

It should be emphasized that in this experiment CR was done in air while ball milling was performed under argon. Moreover, processing time from the raw MgH 2 to the final product took only a few minutes of CR while ball milling took almost 1 hour including loading and unloading the crucible in an argon glove box. Therefore, …

Recently a new phenomenon of bonding polymeric films in solid-state, via symmetric rolling, at ambient temperatures (≈ 20 ° C) well below the glass transition temperature (T g ≈ 78 ° C) of the polymer has been reported.In this new type of bonding, polymer films are subject to plane strain active bulk plastic compression between the …

(1) During the cold rolling of rhenium, only one type of deformation twin was activated. Both primary and secondary twinning were {11 2 ¯ 1} < 1 ¯ 1 ¯ 26} > tension twinning, which dominated the deformation in the initial cold rolling. After twinning saturation, slips and shear bands become dominant deformation.

Bearing ring blanks of the high-speed rail bearings, machine tool spindle bearings and wind power bearings have been manufactured through the ring rolling technology. Yet, the plastic deformation and microstructure evolution of bearing ring blanks during the cold rolling process remains unclear. In this work, the deformation …

The corrugated bonding interface formed in the process does not include an intermetallic phase, but grain refinement of the interface is observed after the CFR process as remarked in Taiyuan University's research [54, 55].The two-dimensional strain distribution model for the initial corrugated rolling process highlighted extreme plastic …

The study explores the grain refining mechanism during severe plastic deformation and its impact on the microstructure of metals. It also examines the use of …

A simple rigid lattice model reveals that the evolution of two-phase crystalline alloys subjected to plastic deformation at low temperature proceeds in two distinctive stages as plastic strain increases.10,11 Consider, for example, an initially flat chemical interface separating elements A and B (Fig. 1a): The shearing of that interface by a …

The obtained results give us reason to conclude that the fatigue life of researched steel is increased when directions of pre-rolled plastic deformation and the tool movement during ball ...

In this paper, the microstructure and mechanical property evolutions of the Cu-10 wt%Fe alloy billet prepared by the double-melt mixed casting process during cold rolling and its deformation behavior were studied, which laid a theoretical foundation of developing a compact process of double-melt mixed casting→cold rolling for producing …

During cold roll-beating forming, rolling of the rolling wheel causes plastic deformation of the work piece and causes violent friction between the rolling wheel and the work …