Effects of particulate reinforcement and heat treatment on the hardness and wear properties of AA 2024-MoSi2 nanocomposites

Published on Apr 1, 2011in Materials & Design7.991
· DOI :10.1016/J.MATDES.2010.11.037
Mahmood Sameezadeh5
Estimated H-index: 5
(UT: University of Tehran),
Massoud Emamy28
Estimated H-index: 28
(UT: University of Tehran),
Hassan Farhangi11
Estimated H-index: 11
(UT: University of Tehran)
Sources
Abstract
Abstract In this study, nanocomposites of AA 2024 aluminum alloy matrix reinforced with different volume fractions of nanometric MoSi 2 intermetallic particles ranging from 0 to 5%, were produced using mechanical alloying technique. For comparison, samples without reinforcing particles and mechanical alloying and a sample with micrometric MoSi 2 particles were also synthesized. The prepared composite powders were consolidated by cold and hot pressing and then heat treated to solution and aged condition (T6). The effects of MoSi 2 particle size, volume fraction and also heat treatment on the hardness and wear properties of the composites were investigated using Brinell hardness and pin-on-disc wear tests. The results indicated that although T6 heat treatment increases the hardness of all samples compared to as hot-pressed (HP) condition, the age-hardenability (aging induced hardness improvement) decreases after mechanical alloying and with increasing MoSi 2 volume fraction due to the high dislocation density produced during mechanical alloying. With increasing the volume fraction of nano-sized MoSi 2 particles up to 3–4%, the hardness of the composites continuously increases and then declines most probably due to the particle agglomeration. The wear sliding test disclosed that the wear resistance of all specimens in T6 condition is higher than that of HP condition and increases with increasing MoSi 2 content. Scanning electron microscopic observation of the worn surfaces was conducted and the dominant wear mechanism was recognized as abrasive wear accompanied by some adhesive wear mechanism.
📖 Papers frequently viewed together
References38
Newest
#1Fatih Toptan (YTU: Yıldız Technical University)H-Index: 19
#2Ayfer Kilicarslan (YTU: Yıldız Technical University)H-Index: 5
Last. Isil Kerti (YTU: Yıldız Technical University)H-Index: 9
view all 5 authors...
Abstract Wetting problem between B 4 C and liquid Al at lower temperatures has to be overcomed for promised mechanical and physical properties, such as high hardness, high wear resistance and stiffness. In the present work, AA 1070 and AA 6063 matrix B 4 C p reinforced composites were produced by casting route at 850 °C and titanium-containing flux (K 2 TiF 6 ) was used to overcome the wetting problem between B 4 C and liquid aluminium metal. AA 6063/B 4 C p composite samples were then subjected...
Source
#1Hamid R. Lashgari (UT: University of Tehran)H-Index: 19
#2A. R. Sufizadeh (UT: University of Tehran)H-Index: 1
Last. Massoud Emamy (UT: University of Tehran)H-Index: 28
view all 3 authors...
Abstract This study was undertaken to investigate the effect of strontium (0.5%) as a modifier on the microstructure and dry sliding wear behavior of A356–10%B 4 C particulate metal matrix composite (PMMC). The composite ingots were made by stir casting process. In this work, composite were characterized by scanning electron microscope equipped with energy dispersive spectrometer (EDS), and dry sliding wear experiment were performed in a pin-on-disc wear tester against a DIN 100Cr6 steel disc at...
Source
#1Mehdi Rahimian (MUT: Malek-Ashtar University of Technology)H-Index: 9
#2Naser Ehsani (MUT: Malek-Ashtar University of Technology)H-Index: 21
Last. Hamid Reza Baharvandi (MUT: Malek-Ashtar University of Technology)H-Index: 24
view all 4 authors...
Abstract The aim of this research is to investigate the effect of the amount of reinforcement on the properties of Al–Al 2 O 3 composite. Alumina particles were mixed with Aluminum particles in the range of 0–20 wt.%. The average particle sizes for the matrix and reinforcement were 30 and 12 μm, respectively. The samples were prepared at two levels of sintering temperature for a constant sintering time of 45 min. It was illustrated that at high weight fractions of reinforcement, the relative den...
Source
#1J. Corrochano (CSIC: Spanish National Research Council)H-Index: 6
#2Marcela Lieblich (CSIC: Spanish National Research Council)H-Index: 21
Last. Joaquín Ibáñez (CSIC: Spanish National Research Council)H-Index: 21
view all 3 authors...
Abstract Six Al–Mg–Si composites reinforced with 15 vol.% of MoSi2 intermetallic particles, together with three unreinforced monolith Al–Mg–Si (AA6061) alloys have been processed by powder metallurgy to quantify the roles of alloy matrix grain size and reinforcement particle on their solutionized hardness and ageing response. In the range studied, hardness of solutionized composites follows a Hall–Petch mechanism. Moreover, it can be rationalised as the sum of the hardness of the alloy matrix wi...
Source
#1Mehrdad Khakbiz (UT: University of Tehran)H-Index: 14
#2Farshad Akhlaghi (UT: University of Tehran)H-Index: 18
Abstract This paper consists of two parts. In the first part, attrition milling of commercially available (0.7 μm) boron carbide (B 4 C) particles was optimized to prepare B 4 C nano-particles. In the second part of the study, mechanical alloying was successfully employed to synthesize metal matrix composite powders with a nanocrystalline Al 6061 alloy as the matrix and B 4 C as the reinforcement. Different amounts of B 4 C particles (5 wt.% and 10 wt.%) having various sizes of 90 nm (produced i...
Source
#1Halil Arik (Gazi University)H-Index: 8
Abstract In this study, Al–α-Si 3 N 4 metal matrix composite (MMCs) materials were produced by using powder metallurgy technique. To prepare mixture of Al and α-Si 3 N 4 powders two different methods were used by milling for 5 h in a ball mill with alumina balls and mechanically alloying for 5 h in a high-energy attritor mill. Then mixed powders were compacted under 1000 MPa pressure to produce standard transverse rupture block specimens with dimension of 6.35 × 12.70 × 31.70 mm. Compacted sampl...
Source
#1Nader Parvin (AUT: Amirkabir University of Technology)H-Index: 26
#2R. Assadifard (AUT: Amirkabir University of Technology)H-Index: 1
Last. P. Marashi (AUT: Amirkabir University of Technology)H-Index: 1
view all 5 authors...
Abstract In this paper, an Al6061–10 wt% SiC composite was prepared using the mechanical alloying route. The morphology and the structure of the prepared powder, which change with milling time, were evaluated using scanning electron microscopy (SEM) and X-ray diffraction (XRD) techniques, respectively. Moreover, the relationships among the stages of mechanical alloying (MA), relative density and hardness of both pressed and hot extruded materials were investigated. The morphological evolutions s...
Source
#1John Walker (University of Sheffield)H-Index: 18
#2Ian M. Ross (University of Sheffield)H-Index: 18
Last. Marcela LieblichH-Index: 21
view all 4 authors...
Abstract Aluminium alloy composites have been extensively investigated for use in tribo-contact applications, however little detailed literature exists on the sub-surface microstructural evolution as a result of lubricated sliding wear. In this study two un-reinforced alloys (2124 and 5056) and identical alloy composites, reinforced with 15 vol.% MoSi 2 intermetallic particles were produced by a powder metallurgy route and subject to lubricated sliding at initial Hertzian contact pressures of 0....
Source
Abstract In this work aluminum–alumina composite material was first produced by mechanical alloying method and then physical and mechanical properties of the products were investigated. For this purpose the aluminum and alumina powders were charged in horizontal ball mill and milled at different times. In order to investigate the physical and mechanical properties of the processed powders, powder metallurgy samples were produced by single action compaction of the powders. The compacted green sam...
Source
#1J.B. Fogagnolo (Charles III University of Madrid)H-Index: 16
#2Maria Helena Robert (State University of Campinas)H-Index: 14
Last. José Manuel Torralba (Charles III University of Madrid)H-Index: 30
view all 3 authors...
This work investigates the use of mechanical alloying to produce aluminium AA6061 matrix composite powders reinforced with AlN, and the relationship among the stages of mechanical alloying, the powder characteristics, and the mechanical strength and hardness of the consolidated materials. The results showed that the brittle particles accelerate the milling process by increasing the matrix deformation and enhancing the welding and the fracture of particles. Moreover, the morphology and the struct...
Source
Cited By62
Newest
In the present work, x wt% B4C (x = 2, 4, 6, 8) and 2 wt% BN reinforced aluminum 6061 metal matrix hybrid composites were synthesized by mechanical milling for 10 h. The milled powders were consolidated by cold uniaxial compaction at various compression pressure (200–800 MPa) and then sintered at various temperatures (400–600 °C). Microstructural characterization of the milled powders and the fabricated composites were performed by X-ray diffraction, scanning electron microscope, and energy disp...
Source
#1M. Prashanth (B. S. Abdur Rahman University)H-Index: 3
#2R. Karunanithi (B. S. Abdur Rahman University)H-Index: 5
Last. Subbarayan Sivasankaran (Qassim University)H-Index: 20
view all 4 authors...
Abstract The main objective of the present study is to develop AA 7017 alloy matrix reinforced with yttrium oxide (Y2O3, rare earth element) nanocomposites by mechanical alloying (MA) and hot pressing (HP) techniques for armor applications. AA 7017+10 vol. % Y2O3 nanocomposites were synthesized in a high-energy ball mill with different milling times (0, 5, 10, and 20 h) to explore the structural refinement effect. The phase analysis and homogeneous dispersion of Y2O3 in AA 7017 nanocrystallite m...
Source
Source
#3Deliang Zhang (Northeastern University (China))
Abstract Size control of β-Al3Mg2 precipitates, formation of clean Al(Mg)/Al3Mg2 interfaces and refinement of matrix microstructures are key structural factors in the development of strong Al(Mg)-Al3Mg2 composites. Here, we combine severe plastic deformation with rapid thermomechanical powder consolidation to attain a desirable synergy of these structural factors to achieve a high strength. The study demonstrates that the fabricated composite containing 1.2vol.%Al3Mg2 precipitates shows a high y...
Source
#1S Dhanalakshmi (DRDO: Defence Research and Development Organisation)
#2K ShanmugaSundaram (College of Engineering, Guindy)
Last. R. Rajendran (Techno India)H-Index: 6
view all 4 authors...
Aluminium matrix composites (AMC) are gaining wide popularity in various sectors due to their excellent properties which are synergic. Apart from strength, wear resistance of a material is also an ...
Source
#1Aluru Praveen Sekhar (Indian Institute of Engineering Science and Technology, Shibpur)H-Index: 6
#2Debdulal Das (Indian Institute of Engineering Science and Technology, Shibpur)H-Index: 24
The present study evaluated hardness, tensile properties and two-body abrasive wear behaviour of Al–Mg–Si alloy specimens artificially aged at 448 K for different durations ranging from 0.5 to 504 h. In addition to the measurements of Vickers hardness and tensile properties, wear tests of differently aged alloys were conducted against SiC abrasive paper of 220 grit size under normal load of 9.81 N with the help of a pin-on-disc tribometer. Abrasive wear characteristics were assessed in terms of ...
Source
#1Aayush Bhat (VIT University)H-Index: 1
#2Sejal Budholiya (VIT University)H-Index: 2
Last. Syafiqah Nur Azrie Safri (UPM: Universiti Putra Malaysia)H-Index: 11
view all 7 authors...
Source
#1P. Vamsi KrishnaH-Index: 17
#2A. Prasad ReddyH-Index: 7
Source
#1M. Prashanth (B. S. Abdur Rahman University)H-Index: 3
#2R. KarunanithiH-Index: 5
Last. Subbarayan Sivasankaran (Qassim University)H-Index: 20
view all 4 authors...
Abstract The present research work investigates the detailed microstructural observation and mechanical behavior of nanocrystallite Al 7017 alloy prepared by Mechanical Alloying (MA) for a different milling times (0, 5, 10, 15, and 20 h)followed by uniaxial hot-pressing. The milled powders were characterized by X-ray diffraction analysis (XRD), High-Resolution Scanning Electron Microscope (HR-SEM), High-Resolution Transmission Electron Microscope (HR-TEM), and Particle Size Analyzer (PSA). The c...
Source
#2P. VelmuruganH-Index: 2
Source
This website uses cookies.
We use cookies to improve your online experience. By continuing to use our website we assume you agree to the placement of these cookies.
To learn more, you can find in our Privacy Policy.