Microstructure and mechanical properties of aluminum alloy matrix composite reinforced with nano-particle MgO

Yar, Adem; Montazerian, Maziar; Abdizadeh, Hossein; Baharvandi, Hamid Reza

doi:10.1016/j.jallcom.2009.04.117

Cited by 189 publications

(68 citation statements)

References 15 publications

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“…Mazahery et al (2009) developed the high performance A356 -nano Al 2 O 3 composites by vortex method. Yar et al (2009) studied the microstructure and mechanical properties of aluminium alloy matrix composite reinforced with nano particle MgO by vortex method. Habibnejad-Korayem et al (2009) carried out the study on tribological behaviour of pure Mg and AZ31 magnesium alloy strengthened with Al 2 O 3 nano particles by vortex method.…”

Section: Introductionmentioning

confidence: 99%

Thermal stability of nano structured fly ash synthesized by high energy ball milling

Rao¹,

Narayanaswami²,

Prasad³

2010

Int. J. Eng. Sci. Tech

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In this paper, an attempt has been made to modify the micro sized fly ash into nano structured fly ash using High Energy Ball Mill. The smooth, glassy and an inert surface of the fly ash can be altered to a rough and more reactive state by this technique. Ball milling was carried out for the total duration of 30 hours. The sample was taken out after every 5 hours of milling for characterizing. The nano structured fly ash was characterized for its crystallite size, lattice strain and percentage of crystallinity by using X-Ray Diffractometer. It was found that for the 30 hrs milling, the crystallite size was reduced from 92 nm to 29 nm and the percentage of crystallinity got reduced from 63% to 38%. The size, shape and texture of the fresh as well as nano structured fly ash were studied using Scanning Electron Microscopy (SEM). The fresh fly ash particles are mostly spherical in shape. The shape of the 30h milled particles is irregular and the surface morphology is rough. Isothermal annealing was carried out on 30 h ball milled fly ash from 100 to 800 0 C for various times. The initial grain size of 29 nm for as-milled sample increased to 30.9 nm and 31.7 nm after annealing for 8 h at 100 and 200 0 C respectively. Whereas this trend was slightly higher for higher temperatures, this increase was in the order of 29 nm to 33.43 nm, 35.35 nm, 36.53 nm, 37.78 nm, 40.42 nm, 41.93 nm after annealing for 4 h at 300, 400, 500, 600, 700 and 800 0 C respectively. Hence, small crystallite size enhancement with good amount of residual strain recovery was observed during the isothermal annealing.

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Section: Introductionmentioning

confidence: 99%

Thermal stability of nano structured fly ash synthesized by high energy ball milling

Rao¹,

Narayanaswami²,

Prasad³

2010

Int. J. Eng. Sci. Tech

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“…Al2O3 nanoparticles act as barriers of dislocations mobility, leading to an improvement of UTS and YS [33]. In addition, mismatch of coefficient of thermal expansion (CTE) between the matrix and reinforcement phase, load transfer from matrix to reinforcement phase and Orowan strengthening mechanism also play an important role in improving the mechanical properties [34][35][36]. Al2O3 nanoparticles also acted as heterogeneous nuclei for the aluminum alloy matrix, leading to a grain-refined strengthening effect [24,37,38].…”

Section: Influence Of Stirring Temperature and Stirring Time On Mechamentioning

confidence: 99%

Microstructure, Mechanical Properties and Wear Behavior of the Rheoformed 2024 Aluminum Matrix Composite Component Reinforced by Al2O3 Nanoparticles

Jiang

Xiao

Che

et al. 2018

Metals

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Abstract:The 2024 nanocomposite reinforced with Al 2 O 3 nanoparticles was fabricated by the ultrasonic assisted semisolid stirring (UASS) method and rheoformed into a cylinder component. Microstructure, mechanical properties, and wear behavior of the rheoformed composite components were investigated. The results showed that the composite components with complete filling status and a good surface were rheoformed successfully. The deformation of semisolid slurries was mainly dominated by flow of liquid incorporating solid grains (FLS), sliding between solid grains (SSG), and plastic deformation of solid grains (PDS). Mechanical properties of the rheoformed composite components were influenced by stirring temperature, stirring time, and volume fraction of Al 2 O 3 nanoparticles. The optimal ultimate tensile strength (UTS) of 358 MPa and YS of 245 MPa were obtained at the bottom of the rheoformed composite components after a 25-min stirring of composite semisolid slurry with 5% Al 2 O 3 nanoparticles at 620 • C. Enhancement of mechanical properties was attributed to high density dislocations and dislocation tangles and uniform dispersed Al 2 O 3 nanoparticles in the aluminum matrix. Natural ageing led to the occurrence of needle-like Al 2 CuMg phase and short-rod-like Al 2 Cu phase. UTS of 417 MPa and YS of 328 MPa of the rheoformed composite components were achieved after T6 heat treatment. Improvement of mechanical properties is due to the more precipitated needle-like Al 2 CuMg phase and short-rod-like Al 2 Cu phase. Wear resistance of the rheoformed composite components was higher than that of the rheoformed matrix component. Wear resistance of the rheoformed composite component increased with an increase in Al 2 O 3 nanoparticles from 1% to 7%. A slight decrease in wear rate resulted from 10% Al 2 O 3 nanoparticles due to greater agglomeration of Al 2 O 3 nanoparticles. A combination mechanism of adhesion and delamination was determined according to worn surface morphology.

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“…Among them, aluminium alloy matrix composites attract much attention due to their lightness, high thermal conductivity, moderate casting temperature, etc. [13]. Due to the ease of formability and lightweight, aluminium has found many applications in industrial areas [1,3].…”

Section: Introductionmentioning

confidence: 99%

Joinability of Particulate Reinforced Alumix 231 Based Composite Materials Produced by Powder Metallurgy Route

Ateş¹,

Gökmen²,

Çinici³

et al. 2016

Metallofiz. Noveishie Tekhnol.

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In the present study, weldability of Alumix 231 based composite materials reinforced with Al 2 O 3 and B 4 C and produced by powder metallurgy route is investigated. Various amounts of (0, 5, 10, and 15% wt.) Al 2 O 3 and B 4 C powders are added to the pre-alloyed Alumix 231 (Al-2.5% Cu-0.5% Mg-14% Si) powders separately and then mixed in a three-dimensional mixer for 45 min. Powders are compacted and sintered in an argon atmosphere at 640C for 4 h. Produced blocks are welded by the Tungsten Inert Gas (TIG) welding at 25 V, 197 A and 14 l/min shielded gas flow in commercially pure argon atmosphere. Macro-and microexamination together with some mechanical properties of the welded area are studied. The results show that, although high amount of particles resulted in a decrease in the density, these composite materials can still be welded by the TIG welding method successfully.Исследуется свариваемость произведённых методом порошковой метал-лургии композитных материалов на основе Alumix 231, армированных Al 2 O 3 и B 4 C. Различные количества (0, 5, 10 и 15 масс.%) порошков Al 2 O 3 и B 4 C по отдельности добавлялись в предварительно сплавленные порош-ки Alumix 231 (Al-2,5% Cu-0,5% Mg-14% Si), а затем перемешивались в трёхмерном миксере в течение 45 минут. Затем порошки прессовались и спекались в атмосфере аргона при 640C в течение 4 часов. Полученные блоки сваривались вольфрамовой сваркой в атмосфере инертного газа при 25 В, 197 А и потоке инертного газа в 14 л/мин в атмосфере технически чистого аргона. Были проведены макро-и микроисследования некоторых механических свойств сварной зоны. Их результаты показали, что, хотя оказалось большое количество частиц с пониженной плотностью, эти композитные материалы могут быть успешно сварены методом вольфра-мовой сварки в атмосфере инертного газа. 1314 H. ATES, U. GOKMEN, H. CINICI, A. UZUN, H. KARAKOC, and M. TURKER у попередньо стоплені порошки Alumix 231 (Al-2,5% Cu-0,5% Mg-14% Si), а потім перемішувалися в тривимірному міксері впродовж 45 хвилин. Потім порошки пресувалися та спікалися в атмосфері арґону при 640C впродовж 4 годин. Одержані блоки зварювалися вольфрамовим зварен-ням в атмосфері інертного газу при 25 В, 197 А та потоці інертного газу у 14 л/хв. в атмосфері технічно чистого арґону. Було виконано макро-та мікродослідження деяких механічних властивостей зварної зони. Їх ре-зультати показали, що, хоча виявилася велика кількість частинок зі зниженою густиною, ці композитні матеріяли можуть бути успішно зва-рені методою вольфрамового зварювання в атмосфері інертного газу.

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Microstructure and mechanical properties of aluminum alloy matrix composite reinforced with nano-particle MgO

Cited by 189 publications

References 15 publications

Thermal stability of nano structured fly ash synthesized by high energy ball milling

Thermal stability of nano structured fly ash synthesized by high energy ball milling

Microstructure, Mechanical Properties and Wear Behavior of the Rheoformed 2024 Aluminum Matrix Composite Component Reinforced by Al2O3 Nanoparticles

Joinability of Particulate Reinforced Alumix 231 Based Composite Materials Produced by Powder Metallurgy Route

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