A5033863023- Metallic Glasses and Amorphous Alloys
- Aluminum Alloys Composites Properties
- High Entropy Alloys Studies
- Aluminum Alloy Microstructure Properties
- Quasicrystal Structures and Properties
- High-Temperature Coating Behaviors
- Microstructure and mechanical properties
- Metal Alloys Wear and Properties
- Phase-change materials and chalcogenides
- Hydrogen Storage and Materials
- Glass properties and applications
- Additive Manufacturing Materials and Processes
- Intermetallics and Advanced Alloy Properties
- Microstructure and Mechanical Properties of Steels
- Advanced materials and composites
- Magnesium Alloys: Properties and Applications
- Shape Memory Alloy Transformations
- Solidification and crystal growth phenomena
- Metal and Thin Film Mechanics
- Mineralogy and Gemology Studies
- Ammonia Synthesis and Nitrogen Reduction
- Material Properties and Applications
- Material Dynamics and Properties
- Magnetic Properties and Applications
- Titanium Alloys Microstructure and Properties
Universidade Federal de São Carlos
2015-2024
Universidade Estadual de Campinas (UNICAMP)
2019
Science et Ingénierie des Matériaux et Procédés
2018
Materia (United States)
2009-2017
Universidade Federal do Rio Grande do Norte
2014
Ibero-American University Puebla
2012
Ibero American University
2012
Universidade do Estado da Bahia
2012
University of Florida
2000-2001
FH Aachen
1986-1989
Wear resistant highly amorphous Fe60Cr8Nb8B24 (at.%) coatings of about 280 μm thickness were prepared through high velocity oxygen fuel (HVOF) thermal spray process onto API 5L X80 steel substrate. Feedstock powders produced by gas atomization with low purity precursors modifying AISI 430 stainless additions niobium (Fe-Nb) and boron (Fe-B). It was found that the mostly some embedded FeNbB Fe2B borides. The formation a large fraction phase attributed to cooling rates molten droplets combined...
High Entropy Alloys (HEAs) are new classes of structural metallic materials that show remarkable property combinations. Yet, often times interesting compositions still found by trial and error. Here we an "Effective Atomic Radii for Strength" (EARS) methodology, together with different semi-empirical first-principle models, can be used to predict the extent solid solution strengthening discover design HEAs unprecedented properties. We have designed a Cr
Abstract MgH 2 is a promising material for solid‐state hydrogen storage due to its high gravimetric and volumetric capacity relatively low cost. Severe plastic deformation (SPD) processing techniques are being explored as an alternative high‐energy ball‐milling (HEBM) in order obtain more air resistant materials reduce times. In this work, Mg, , –Fe mixtures were severely mechanically processed by different such high‐pressure torsion (HPT), extensive cold forging, rolling. A very significant...
Abstract Quasicrystalline alloys and their composites have been extensively studied due to complex atomic structures, mechanical properties, unique tribological thermal behaviors. However, technological applications of these materials not yet come age still require additional developments. In this review, we discuss the recent advances that made in last years toward optimizing fabrication processes properties Al‐matrix reinforced with quasicrystals. We detail high‐strength rapid‐solidified...
Coatings of a Fe43.2Co28.8B19.2Nb4Si4.8 alloy on AISI 1020 steel substrates were produced by laser cladding. By properly selecting the processing parameters adherent tracks with negligible dilution could be obtained. For conditions used clad material presents graded structure consisting 5 layers different microstructures, resulting from prevalent solidification path. Solidification starts epitaxial growth Fe–Co δ-ferrite heating substrate near fusion line into stability temperature range....
In this research work the microstructure and wear resistance of boron-modified stainless steel coatings were investigated. The produced by Plasma Transferred Arc (PTA) with powders supermartensitic superduplex 1 3 wt.% B addition, respectively. deposition was carried out on AISI 4140 substrate. Microstructural characterization revealed dendritic growth in both cases; however, amount borides formed quite different, around 14% for 32% B. Thermodynamic calculations used to predict phase...
This letter proposes a criterion to quantitatively correlate chemical composition with crystallization behaviors of Al-based glass-former alloys. By extending multicomponent systems the topological instability model Egami and Waseda [J. Non-Cryst. Solids 64, 113 (1984)], we introduce “lambda (λ) criterion” according which amorphous alloys λ>0.1 exhibit glassy behavior, whereas λ<0.1 are nanocrystalline. Nanoglassy occur when λ≈0.1. A large number experimental findings in...
Selective laser melting (SLM) is an additive manufacturing process used to produce parts with complex geometries layer by layer. This rapid solidification method allows fabricating samples in a non-equilibrium state and refined microstructure. In this work, fabricate 3 mm diameter rods of Cu-based shape memory alloy. The phase formation, thermal stability mechanical properties were investigated correlated. Samples relative density higher than 92% without cracks obtained. A single monoclinic...