A5079478023- Aluminum Alloys Composites Properties
- Microstructure and mechanical properties
- Metal and Thin Film Mechanics
- Additive Manufacturing Materials and Processes
- Aluminum Alloy Microstructure Properties
- Advanced materials and composites
- Advanced Welding Techniques Analysis
- Titanium Alloys Microstructure and Properties
- Intermetallics and Advanced Alloy Properties
- Metal Forming Simulation Techniques
- Additive Manufacturing and 3D Printing Technologies
- High Entropy Alloys Studies
- Nuclear Materials and Properties
- High Temperature Alloys and Creep
- Magnesium Alloys: Properties and Applications
- Structural Response to Dynamic Loads
- Advanced ceramic materials synthesis
- Supercapacitor Materials and Fabrication
- High-Temperature Coating Behaviors
- Welding Techniques and Residual Stresses
- High-Velocity Impact and Material Behavior
- Metallurgy and Material Forming
- MXene and MAX Phase Materials
- Electrocatalysts for Energy Conversion
- Material Properties and Failure Mechanisms
Marche Polytechnic University
2017-2023
Università degli Studi eCampus
2021-2022
Université Laval
2020
Friction stir welding (FSW) is the most widely used solid-state joining technique for light-weight plate and sheet products. This new considered an energy-saving, environment friendly, relatively versatile technology. FSW has been found to be a reliable in high-demand technology fields, such as high-strength aerospace aluminum titanium alloys, other metallic alloys that are hard weld by conventional fusion welding. Several studies accounted microstructural modifications induced FSW, based on...
In this work, the corrosion behavior of an AA6012 aluminum alloy, submitted to a T6 strengthening treatment (solubilization and aging), later severe plastic deformation, through equal channel angular pressing (ECAP) was studied. Some these samples were cryogenic before ECAP process. The analysis carried out at room temperature by means electrochemical characterization in 0.1 M Cl− deaerated aerated solution pH 2. For purpose, Tafel plots impedance spectroscopy tests performed. evolution...
Co-Cr alloys such as L605 are widely applied for the manufacture of medical devices, including tiny cardiovascular stents. The presence potentially toxic and allergenic release Ni, Co, Cr ions from these devices remains an unsolved concern. Surface modification by oxygen plasma immersion implantation (PIII) could be excellent technique to create a dense thin passive oxide layer on relatively complex shape device, stent, thus reducing potential metallic ions. effect PIII was investigated...
The description of the dependence steady-state creep rate on applied stress and temperature is almost invariably based Norton equation or derived power-law relationships. In hot working, does not work, therefore usually replaced with Garofalo (sinh) equation. Both these equations are phenomenological in nature can be seldom unambiguously related to microstructural parameters, such as dislocation density, although early efforts this sense led introduction “natural power law” exponent 3. an...
The effects of postprocessing annealing at 225 °C for 2 h on the creep properties AlSi10Mg alloy were investigated through constant load experiments carried out 150 °C, 175 and °C. In range experimental conditions here considered, treatment resulted in an increase minimum rate a given stress. reduction strength was higher lowest temperature, while effect progressively vanished as temperature increased and/or applied stress decreased. dependence modeled using physically-based model which took...
In recent years, a creep model that does not involve adjustable parameters has been successfully applied to coarse-grained aluminum. The main feature of this is it fully predictable. On the other hand, in case age-hardenable alloys, any physically-based should take into account changes volume fraction, size and distribution strengthening precipitates, effect grain size. With aim view, paper, original previously single phase-alloys modified describe effects consequences high-temperature...
Friction stir welds are considered reliable joints for their lack of voids, cracks and distortions. When compared to the base material, friction welding (FSW) typically exhibit finer grain structured (especially at nugget zone, NZ). Similarly, refined structure can also be obtained by severe plastic deformation (SPD) techniques, such as equal channel angular pressing (ECAP). In fact, fine structures produced within NZ FSW or processed (FSP) materials usually coarser than ones achieved ECAP....
The Equal Channel Angular Processing or pressing, i.e. the ECAP, allows to modify properties of materials at microstructure level. It consists in induction a high amount shear deformation material that leads general grain size refinement, precipitate dispersion and redistribution dislocations depending on experiment conditions. objective present investigation is understand how ECAP can influence surface bulk mechanical double aluminium alloy specimens. Each specimen was composed tubular part...
A basic model was applied to pure Ni and then a single-phase superalloy. The high temperature deformation of the superalloy, solution treated IN718, investigated by torsion testing in high-temperature regime (1000–1100 °C) where no precipitation secondary phases expected. material exhibited classical behaviour alloys which undergo dynamic recrystallization. peak-flow stress dependence on strain-rate described physically-based set constitutive equations, took into account both dislocation...
Abstract Among different welding techniques currently available in the market, friction stir (FSW) is surely considered as an effective and reliable joining technique. Friction welds are characterized by lack of voids, cracks distortions, technique does not involve any material fusion. The grained structure weld joint generally finer than base material. In particular, nugget zone (NZ) experiences a dynamic recrystallization process during FSW that guarantees stable very-fine structure....
Post-processing heat treatments of Ti-6Al-4V parts produced by additive manufacturing are essential for restoring the peculiar martensitic structure that originates from extremely high cooling rates typical this technology. In study, influence a 1050 °C annealing on alloy, manufacturing, minimum creep rate dependence applied stress and temperature, was investigated at 650 °C. Experimental data obtained after two different subcritical annealings were also considered comparison purposes. The...
In this work a W coating was deposited through PS in Ar-H2 atmosphere on substrate of CuCrZr with an interlayer consisting gradually changing fractions Cu and W. The the showed good adhesion no cracks were observed. hardness along determined by nano-indentation tests results that gradient does exist both metals. Microstructural examinations suggest depends texture, which exhibits significant differences interlayer: multiplication movement dislocations, localized plasticity under indenting...
Equal-channel angular pressing (ECAP) is known to induce significant grain refinement and formation of tangled dislocations within the grains. These are induced evolve form low-angle boundaries (i.e., cell boundaries) eventually high-angle boundaries). On other hand, precipitation sequence age hardening aluminum alloys can be significantly affected by pre-straining severe plastic deformation. Thus, ECAP expected influence T6 response alloys. In this study, a complex Al-Cu-Mg-Li-Ag-Zr-Sc...