Comparative analysis of niobium and vanadium carbide efficiency in the high energy mechanical milling of aluminum bronze alloy

Dias, Alexandre Nogueira Ottoboni; Oliveira, Leonardo Albergaria; Mendonça, C. S. P.; Junqueira, Mateus Morais; Melo, Mírian de Lourdes Noronha Motta; Silva, Gilbert

doi:10.1590/0370-44672017710031

Cited by 6 publications

(6 citation statements)

References 12 publications

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“…With this, these particles are considered more efficient for the destruction of the crystalline planes, which is represented by the widening of the most intense peaks and the disappearance of the less intense peaks of the XRD graphs (Figure 11). Thus, as the VC was the most efficient carbide for the reduction of the steel particles, consequently the percentage of crystalline phase for this configuration was lower [38][39][40] .…”

Section: Analysis Of the Percentage Of Crystalline Phasesmentioning

confidence: 91%

Analysis of Milling Efficiency of the Vanadis® 8 Tool Steel with Additions of Vanadium and Molybdenum Carbides

et al. 2021

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The Vanadis ® 8 is a tool steel used in the manufacture of dies, punches and tools. It has a high carbon content combined with chromium, molybdenum and vanadium, and presents good performance in its mechanical properties. Usually, its chips obtained by machining are sold to companies that use remelting. However, this technique is considered expensive and harmful to the environment. Therefore, this work aimed to analyze the efficiency of the addition of vanadium carbide (VC) and molybdenum carbide (Mo 2 C) in the high energy ball milling of the Vanadis ® 8 steel. Microstructural analysis were performed in the pure steel and with 3% of VC and Mo 2 C additions. The milling parameters used were: speed of 350 rpm, ball-to-powder weight ratio of 15:1 and times of 4, 8 and 12 hours. The results indicated that the Vanadis ® 8 steel milled with VC presented the best microstructural results in all of the conducted tests.

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Section: Analysis Of the Percentage Of Crystalline Phasesmentioning

confidence: 91%

Analysis of Milling Efficiency of the Vanadis® 8 Tool Steel with Additions of Vanadium and Molybdenum Carbides

et al. 2021

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“…These particles have attracted interest due to their exceptional mechanical, physical and chemical properties, aiming to increase the high energy milling efficiency and the mechanical strength of the material [15,16]. Vanadium carbide is an important material for industrial applications due to excellent resistance to high temperatures, and its high chemical and thermal stability, even at high temperature [17]. In some studies, it was verified that the addition of carbide in the process of the high energy milling of chips from the machining process, resulted in greater efficiency of the milling process, with a greater decrease in the size of the particles, obtaining sizes of nanometric particles [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Recycling Chips of Stainless Steel Using a Full Factorial Design

Mendonça

Capellato

Bayraktar

et al. 2019

Metals

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The aim of this study was to provide an experimental investigation on the novel method for recycling chips of duplex stainless steel, with the addition of vanadium carbide, in order to produce metal/carbide composites from a high-energy mechanical milling process. Powders of duplex stainless steel with the addition of vanadium carbide were prepared by high-energy mechanical ball milling utilizing a planetary ball mill. For this proposal, experiments following a full factorial design with two replicates were planned, performed, and then analyzed. The four factors investigated in this study were rotation speed, milling time, powder to ball weight ratio and carbide percentage. For each factor, the experiments were conducted into two levels so that the internal behavior among them could be statistically estimated: 250 to 350 rpm for rotation speed, 10 to 50 h for milling time, 10:1 to 22:1 for powder to ball weight ratio, and 0 to 3% carbide percentage. In order to measure and characterize particle size, we utilized the analysis of particle size and a scanning electron microscopy. The results showed with the addition of carbide in the milling process cause an average of reduction in particle size when compared with the material without carbide added. All the four factors investigated in this study presented significant influence on the milling process of duplex stainless steel chips and the reduction of particle size. The statistical analysis showed that the addition of carbide in the process is the most influential factor, followed by the milling time, rotation speed and powder to ball weight ratio. Significant interaction effects among these factors were also identified.

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“…Aluminum bronze has been investigated (Dias et al, 2017(Dias et al, , 2018Wang et al, 2018), due to its wide range of applications, making them preferable to other engineering materials, notwithstanding its high strength, abrasion, wear, cavitation and impact resistance. Aluminum is the principal alloying metal added to copper, which improves its mechanical and corrosion properties, in addition to other elements such as iron, nickel and manganese in varying proportions (Makhlouf et al, 2016;Nwambu et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

“…The most important parameters of the sintering cycle are sintering time and temperature, besides the sintering atmosphere, which has great influence on corrosion behavior and mechanical properties. Hydrogen, argon, and vacuum atmospheres are the correct conditions for sintering (Mariappan et al, 2011;Jabur, 2013;Ertugrul et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Analysis of the densification of a composite obtained by sintering process of aluminum bronze powders with different carbides

et al. 2019

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Aluminum bronze alloy is applied in environments that require materials of high mechanical resistance and wear, such as marine, oil & gas and aerospace ones. This study analyzes the densification of composites based on aluminum bronze with additions of the vanadium (VC) and niobium (NbC) carbides, and the influence of these carbides in the milling efficiency and improvement of the diffusion process between particles to obtain better results for density and porosity. The composites were produced by powder metallurgy from aluminum bronze powders obtained from the mechanical milling process of discarded scraps. The efficiency of the sintering process depends on parameters, such as the time and temperature of sintering, together with the size of the particles obtained from the milling process. This study aimed to obtain and characterize the composites produced by the powder metallurgy route, with NbC and VC addition and to analyze physical properties, such as density and porosity. The powder morphologies, particle sizes and samples sintered were performed by scanning electron microscopy (SEM), X ray diffraction (XRD), laser diffraction analysis and optical microscopy (OM). The results indicate that addition of VC improves the milling efficiency, when compared to NbC addition, since it promotes a greater reduction of the particle size, directly favoring the sintering process. In this case, to achieve similar particle size, twice the milling time was required when NbC was used. The density values achieve ~ 73% of reference material for VC addition and ~ 68% for NbC and porosities varying between 27% and 38%.

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Comparative analysis of niobium and vanadium carbide efficiency in the high energy mechanical milling of aluminum bronze alloy

Cited by 6 publications

References 12 publications

Analysis of Milling Efficiency of the Vanadis® 8 Tool Steel with Additions of Vanadium and Molybdenum Carbides

Analysis of Milling Efficiency of the Vanadis® 8 Tool Steel with Additions of Vanadium and Molybdenum Carbides

Recycling Chips of Stainless Steel Using a Full Factorial Design

Analysis of the densification of a composite obtained by sintering process of aluminum bronze powders with different carbides

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