A5079039801- Aluminum Alloys Composites Properties
- Aluminum Alloy Microstructure Properties
- Microstructure and mechanical properties
- Advanced Welding Techniques Analysis
- MXene and MAX Phase Materials
- Advanced ceramic materials synthesis
- Additive Manufacturing and 3D Printing Technologies
- Advanced materials and composites
- Bauxite Residue and Utilization
- Solidification and crystal growth phenomena
- Magnesium Alloys: Properties and Applications
- Metal Alloys Wear and Properties
- Material Properties and Applications
- Tribology and Wear Analysis
- Welding Techniques and Residual Stresses
- Metallurgical Processes and Thermodynamics
- Electromagnetic wave absorption materials
- Metal and Thin Film Mechanics
- Additive Manufacturing Materials and Processes
- Metallurgy and Material Forming
- Pigment Synthesis and Properties
- Microstructure and Mechanical Properties of Steels
- Materials Engineering and Processing
University of Bologna
2014-2020
The optimisation of heat treatment parameters for Al–Cu–(Mg–Ag) cast alloys (2xxx) having different microstructural scales was investigated. Thermo-Calc software used to design optimal alloy compositions. Differential scanning calorimetry (DSC), electron microscopy and wavelength-dispersive spectroscopy technique were employed determine proper solution temperature homogenisation time as well incidence incipient melting. Proper artificial ageing each identified using DSC analysis hardness...
The aim of the present work is study T6 heat treatment A354 (Al-Si-Cu-Mg) casting alloy. was optimized by maximizing mechanical strength alloy while keeping cost effective, reducing time and temperature. Due to presence low melting compounds, a double stage solution proposed. first aimed at homogenization dissolution phase second higher temperature evaluated foster Cu/Mg rich intermetallics keep as possible. Microstructural investigations were performed through optical electronic microscopy,...
Cast aluminum alloys are widely used in the automotive field for production of complex engine parts. However, mechanical properties heat-treatable (e.g., Al–Si–Mg or Al–Si–Cu–Mg) negatively affected by prolonged exposure to temperatures higher than about 200 °C. To date, several researchers have proposed addition alloying elements, such as Sc Hf, enhancing high temperature behavior cast Al alloys, while Mo has not been investigated. The present study aimed assess effects on microstructure,...
Al-Si-Cu alloys are the most widely used materials for high-pressure die casting processes. In such alloys, Fe content is generally high to avoid soldering issues, but it considered an impurity since generates acicular intermetallics (β-Fe) which detrimental mechanical behavior of alloys. Mn and Cr may act as modifiers, leading formation other Fe-bearing particles characterized by less harmful morphologies, tend settle on bottom furnaces crucibles (usually referred sludge). This work aimed...
The effect of Zr addition on overaging and tensile behavior in a 2618 Al–Cu–Mg–Ni–Fe alloy has been investigated this study. chemical composition the base alloy, containing ~0.1 wt % Zr, was modified by adding to reach target content 0.25 %. Cast bars were T6 heat-treated according industrial parameters, involving soaking at 525 °C for 8 h, quenching hot water (50 °C), artificial aging 200 20 h. Both + alloys overaged 250 300 up 192 evaluate decrease hardness with high temperature exposure...
Al-Si-Mg alloys are commonly employed for the production of automotive castings. In view recent stringent emissions standards and consequent engine downsizing, these components must withstand higher temperatures stresses than in past. this regard, heat treatable quaternary Al-Si-Cu-Mg gained particular interest years, due to their superior mechanical properties thermal stability. The present research activity was addressed evaluate influence cooling rate on microstructure consequently room...
This study focuses on the role of Mo addition mechanical properties an Al-Si-Cu-Mg alloy in as-cast and heat-treated condition at ambient elevated temperature. Addition 0.4 to 0.6 wt.% forms Mo-bearing dispersoid particles which have a relatively high melting point improve temperature tensile strength. Ductility suffered presence particles. Trace up has negligible influence yield strength hardness conditions 250 °C.
The high temperature tensile behaviour of the A354 casting aluminum alloy was investigated also evaluating influence secondary dendrite arm spacing (SDAS). Cast specimens were produced through a gradient solidification equipment, obtaining two different classes SDAS, namely 20-25 µm (fine microstructure) and 40-50 (coarse microstructure). After hot isostatic pressing T6 heat treatment, samples underwent mechanical characterization both at room (200 °C). Results tests hardness measurements...
The present study aims at evaluating the gas bubbling method, based on use of dry air as a gaseous phase, for production Al metal matrix nanocomposites through proper gas-liquid reaction. In particular, 2 O 3 reinforcement particles were in-situ synthesized in molten commercially pure oxidation technique. Dry was injected melt order to induce controlled matrix. SEM-EDS analysis produced samples revealed presence alumina particles, ranging from nanoto micrometric size, demonstrating...