Fabio Gatamorta
@uerj.br
Department of Mechanical Engineering
UERJ - University of the state of Rio de Janeiro
Experienced Professor with a demonstrated history of working in the higher education industry. Strong education professional with a Doctorate focused in Materials and Process on UNICAMP - Campinas University. More than 23 years experience working in University of Campinas (Brazil) with Production and Characterization of syntactic foams and low density metal matrix composites. • Hands on experience in equipment design and construction. • Grasp of both technical and practical presentations at symposiums and fairs on materials; • Understanding of hydraulic and pneumatic systems, and thermal analyses; • Experience in machining, forging and casting of ferrous and non-ferrous metals; • Experience abroad, having lived 2 months in France;
RESEARCH, TEACHING, or OTHER INTERESTS
Mechanical Engineering, Mechanics of Materials, Industrial and Manufacturing Engineering, Engineering
Scopus Publications
Scopus Publications
Fabio Gatamorta, Dhurata Katundi, Olga Klinkova, Emin Bayraktar, and Ibrahim Miskioglu
Springer Nature Switzerland
Eduardo José Bernardes, Fabio Gatamorta, Isabella Carvalho Lancini, Ibrahim Miskioglu, and Emin Bayraktar
Springer Nature Switzerland
Georges Zambelis, Fabio Gatamorta, Özgür Aslan, Ibrahim Miskioglu, and Emin Bayraktar
Springer Nature Switzerland
Fabio Gatamorta, Olga Klinkova, Özgür Aslan, Ibrahim Miskioglu, and Emin Bayraktar
Springer Nature Switzerland
Fabio Gatamorta, Noé Cheung, Dhurata Katundi, Ibrahim Miskioglu, and Emin Bayraktar
Springer Nature Switzerland
Cagatay Kasar, Özgür Aslan, Fabio Gatamorta, Ibrahim Miskioglu, and E. Bayraktar
CRC Press
Fabio Gatamorta, Ibrahim Miskioglu, Dhurata Katundi, and Emin Bayraktar
Springer International Publishing
Utku Kaftancıoglu, Georges Zambelis, Fabio Gatamorta, Ibrahim Miskioglu, and Emin Bayraktar
Springer International Publishing
Ibrahim Miskioglu, Georges Zambelis, Fabio Gatamorta, Ozgur Aslan, and Emin Bayraktar
Springer International Publishing
H. M. Enginsoy, E. Bayraktar, F. Gatamorta, D. Katundi, and I. Miskioglu
Springer International Publishing
F. Gatamorta, H. M. Enginsoy, E. Bayraktar, and I. Miskioglu
Springer International Publishing
E. Bayraktar, D. Katundi, F. Gatamorta, I. Miskioglu, and H. Murat Enginsoy
Springer International Publishing
E. Bayraktar, F. Gatamorta, H. M. Enginsoy, J. E. Polis, and I. Miskioglu
Springer International Publishing
F. Gatamorta, H. M. Enginsoy, E. Bayraktar, I. Miskioglu, and D. Katundi
Springer International Publishing
H. M. Enginsoy, E. Bayraktar, I. Miskioglu, F. Gatamorta, and D. Katundi
Springer International Publishing
H. M. Enginsoy, F. Gatamorta, E. Bayraktar, I. Miskioglu, and A. Larbi
Springer International Publishing
J. P. Paschoal, R. C. Moraes, E. Bayraktar, J. Sartori, R. Silva, and F. Gatamorta
Springer International Publishing
R. C. Moraes, J. P. Paschoal, E. Bayraktar, R. Silva, R. Costa, and F. Gatamorta
Springer International Publishing
H.M. Enginsoy, E. Bayraktar, D. Katundi, F. Gatamorta, and I. Miskioglu
Elsevier BV
Abstract Recycled AA7075 aluminum alloy and pure electrolytic copper were used as the matrix to manufacture new aluminum-copper metal matrix composites (ACMMCs). Powder metallurgy methods were used and the green compacts were finalized by sintering only and sinter + forging. Experimental and numerical investigation of recycled hybrid metal matrix composites manufactured by the two methods was performed. Al–Cu matrix combined with the reinforcements ZnO, Nb2Al and SiC. Two basic formulations were used where the contents Nb2Al and SiC was kept constant and the content of ZnO were 15 wt% and 30 wt%, respectively. The effects of these reinforcements used in the hybrid metal matrix composite structure on the mechanical and physical properties were investigated. The Nb2Al, SiC ratios used in the structure (chemical interaction in the internal structure, the effects on static-dynamic compression and wear behaviors) were kept constant, in particular the ZnO component (interactions with other components and their effects on electrical properties) were investigated. Micro-hardness analyses, surface scratch tests, quasi-static and dynamic compression tests were conducted. Also, electrical conductivity of the composites were determined. The effect of the composite's formulations and production method on the results were investigated. It was found when ZnO content was reduced the yield stress and ultimate strength values increased, but their resistance to impact loading reduced. Also, sinter + forged samples exhibited higher yield stress and ultimate strength than the just sintered samples. The damage and microstructural analyses were performed by Scanning Electron Microscope (SEM). Moreover, a non-linear numerical model was utilized to simulate quasi-static compression and dynamic compression (low velocity impact) behaviors of the composites for both formulations and manufacturing methods. Finite element simulations were performed using the ABAQUS™/Explicit dynamic finite element software. It was determined that there was a satisfactory agreement between experimental and finite element model results.
E. Bayraktar, I. Miskioglu, D. Katundi, and F. Gatamorta
Springer International Publishing
Aluminum based hybrid composites were produced from recycled AA7075 chips with the addition of TiC (d ≤ 3–5 micron), MoS2 and Al2O3 fiber. In the two groups of composites produced, the content of MoS2 and Al2O3 were fixed as 2 wt % and 3 wt % respectively, whereas TiC content was at two levels (5–10%). The combined method of powder metallurgy route, sintering followed by forging, was used to manufacture these composites. These composites are targeted for aeronautical and automotive industries for components subjected to static as well as cyclic and dynamic loading. In addition to mechanical properties, machinability of these composites is of importance hence, MoS2 was included in the formulation. Micro hardness, 3 point bending, low velocity impact and nanoindentation (creep and wear) tests were performed on samples manufactured by just sintering and sintering followed by forging. The results showed that, in generals, the samples that were forged after sintering yielded better properties. The microstructure analyses (matrix/interface) have been carried out by Scanning Electron Microscope (SEM).
F. Gatamorta, Ibrahim Miskioglu, E. Bayraktar, and M. L. N. M. Melo
Springer International Publishing
In this work, an alternative aluminium matrix composite (AMCs) was designed from the recycled chips of the aluminium, Alumix 431 given by Brazilian aeronautic company, through combined method of powder metallurgy followed by Sintering + Forging. We aimed for the application for the connection pieces to transfer motion mainly used in automotive and aeronautical area as an alternative replacement for conventional alloys used in this area. First of all, A typical matrix was developed from recycled aluminium (AA 431) chips by high energy milling in a planetary ball mill with an inert argon atmosphere to prevent oxidation of the powders and this matrix was reinforced basically with TiC (5 wt % and 10 wt %) and molybdenum and copper (Mo 4 wt %, Cu 4 wt %) as a secondary reinforcements respectively. Mechanical and physical properties were evaluated through micro-hardness, static compression and 3 point bending (PB) tests and impact-drop weight tests were carried out. The microstructure analyses have been carried out by Scanning Electron Microscope (SEM).
F. Gatamorta, Dhurata Katundi, E. Bayraktar, L. M. P. Ferreira, and M. L. N. M. Melo
Springer International Publishing
In this work, magnetic shape memory composites (MSMCs) was designed as an alternative replacement of actuators. A special recycled fresh scrap pure electrolytic copper was obtained from the French aeronautic society and milling of Cu-chips was carried out by high energy milling in a planetary ball milling with an inert argon atmosphere to prevent oxidation of the powders. Composite design has been carried out through combined method of powder metallurgy and sinter Forging. Firstly, Cu matrix was doped with fine powder reinforcements (Ni, Mn-Al and Fe3O4 magnetic iron oxide) in different ratios. After that, the ball milling was carried out during the 4 h. Mechanical and physical properties of these composites were analyzed. Magnetic permeability and deformation rate was also measured. The microstructure analyses have been carried out by Scanning Electron Microscope (SEM).
H.M. Enginsoy, F. Gatamorta, E. Bayraktar, M.H. Robert, and I. Miskioglu
Elsevier BV
Abstract In this study powder metallurgy and thixoforming methods are used together to manufacture aluminum alloy based composite materials reinforced with Nb2Al particles and glass bubbles (GB). Fresh scrap recycled aluminum chips, AA7075 received mainly from Brazilian aeronautic industry, are used as the raw material. Processing parameters of the manufacturing techniques were optimized and the distribution of the reinforcing particles as well as their interfaces with the matrix were analyzed. The mechanical properties of the newly designed composite material were determined by compression and bending tests. Very detailed interface analysis and microstructure and fracture surface evaluations were performed by Scanning Electron Microscopy (SEM). The results indicate that the proposed combined powder metallurgy and thixoforming method yields metal matrix composites with good mechanical properties. A non-linear finite element model (three dimensional) was used to simulate the bending and compression behaviour of Al-Nb2Al composites. A subroutine, VUHARD, was written to use with ABAQUS to analyze the effect of thixoforming and sintering on the micro and macrostructure of the manufactured materials. Different ratios of reinforcing particulates (Nb2Al, Glass Bubbles) used in the experimental specimens were used in Representative Volume Element (RVE) for the microstructure modeling. Numerical models for the macrostructure were created using these micro-structures. It has been observed that there is a good agreement between numerical analysis and experimental results. Proposed process offers an original method for the production of newly designed composite material from recycled waste aluminum that can have a major impact on the energy consumption in the aluminum industry, and when enhanced with the numerical tools for simulation it can lead to the development of better performing materials for the aviation industry.
Claudiney Mendonça, Patricia Capellato, Emin Bayraktar, Fábio Gatamorta, José Gomes, Adhimar Oliveira, Daniela Sachs, Mirian Melo, and Gilbert Silva
MDPI AG
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.
Fábio Gatamorta, C. S. P. Mendonça, M. M. Junqueira, E. Bayraktar, B. G. Andrade, M. de L. M. Melo, and G. Silva
Springer International Publishing
The present paper discusses response surface methodology as an efficient approach for predictive model building and optimization of the high energy milling process from the chip duplex stainless steel with a carbide vanadium addition willing to obtain the smaller particle size. The process parameters studied was milling time of 10 h and 50 h. Rotations were performed at 250 and 350 rpm. Vanadium carbide was added from 0% to 3% in weight, and a mass/ball ratio of 1/10 and 1/20. An analysis of particle size and a scanning electronic microscopy were used to measure and characterize particle size. With addition of carbide in milling process resulted on a reduction of particle size compared to the material without carbide added around 66%. The results predicted using factorial regression model showed high values of regression coefficients (R2 = 0.952) indicating good agreement with experimental data. The minimum value of particle size was obtained for following optimal conditions: rotation of 325 rpm, time of 42 h, ball/mass 18:1 and carbide 2, 67%wt. The particle size of fabricated powders after 50 h of milling with 3% vanadium carbide addition was about 186 times lower than that the initial chips.