The effect of the pre-homogenization treatment on the fracture characteristics and wear properties of ECAPed Al–Cu alloys

Aal, Mohamed Ibrahim Abd El

doi:10.1016/j.msea.2012.01.101

Cited by 20 publications

(11 citation statements)

References 30 publications

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“…13 A number of experimental studies on Al-Cu alloys have been carried out over the past several years. [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28] These studies mainly involve the mechanical properties, [14][15][16][17][18][19] corrosion resistance, [20][21][22][23] wear properties, [24][25][26] activation energy, 27 fatigue properties, 28 and so on. But there is no integrated theoretical investigation on thermodynamic properties, thermal stability, and energetic reaction properties.…”

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confidence: 99%

Molecular dynamics simulations on the melting, crystallization, and energetic reaction behaviors of Al/Cu core-shell nanoparticles

Cheng¹,

Zhang²,

Zhang³

et al. 2013

Journal of Applied Physics

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Using molecular dynamics simulations combined with the embedded atom method potential, we investigate the heating, cooling, and energetic reacting of core-shell structured Al-Cu nanoparticles. The thermodynamic properties and structure evolution during continuous heating and cooling processes are also investigated through the characterization of the total potential energy distribution, mean-square-distance and radial distribution function. Some behaviors related to nanometer scale Cu/Al functional particles are derived that two-way diffusion of Al and Cu atoms, glass phase formation for the fast cooling rate, and the crystal phase formation for the low cooling rate. Two-way atomic diffusion occurs first and causes the melting and alloying. In the final alloying structure, Cu and Al atoms mixed very well except for the outmost shell which has more Al atoms. For the investigation of the thermal stability and energetic reaction properties, our study show that a localized alloying reaction between the Al core and Cu shell is very slow when the initial temperature is lower than 600 K. But a two-stage reaction may occur when the initial temperature is 700 K. The reaction rate is determined by the solid-state diffusion of Al atoms in the Cu shell at the first stage, yet the reaction rate is much faster at the second stage, due to the alloying reaction between the liquid Al core and the Cu shell. At higher temperatures such as 800 K and 900 K, the alloying reaction occurs directly between the liquid Al core and the Cu shell.

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confidence: 99%

Molecular dynamics simulations on the melting, crystallization, and energetic reaction behaviors of Al/Cu core-shell nanoparticles

Cheng¹,

Zhang²,

Zhang³

et al. 2013

Journal of Applied Physics

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“…(1 c) was manufactured from the tool steel and hardened to ~55 HRC. The samples were lubricated with zinc stearate [21]. During the PTCAP process, the tube samples were pressed into the tubular angular gap between the die and the mandrel.…”

Section: Experimental Workmentioning

confidence: 99%

Effect of PTCAP Passes on the Mechanical Properties of Copper Tubes

Alshafey

El-Aal

Ramadan

et al. 2017

Port-Said Engineering Research Journal

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Commercially pure copper samples were successfully deformed by parallel tubular channel angular pressing (PTCAP) up to different passes at room temperature. The effects of the PTCAP number of passes on the microstructure, mechanical properties, microhardness and wear resistance of the processed samples were fully investigate. The microstructure of processed samples were observed by SEM and showed notable decrease in the grain size with increase number of passes. The mechanical properties of the pure copper in each pass were studied by tensile testing and microhardness method at room temperature. In this respect, UTS, σ 0.2% and microhardness have been markedly improved from 199.03, 102.17 MPa and 67.83 HV as the annealed condition to 331.40, 293.51 MPa and 144.03 HV after the forth pass, respectively. Besides, the elongation percent were decreased while, the wear resistance improved with increased number of PTCAP passes. Ductile fracture with extensive necking zone and many big dimples occurs in annealed samples, while fine dimples were decreased with the deformation final passes of PTCAP processed samples.

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“…The influence of grain and particle sizes of metals and MMCs on their wear properties is an important research topic. Understanding the effects of decreasing grain and particle sizes on the wear properties of metals and MMCs manufactured by different methods (e.g., high-pressure torsion (HPT)) was the motivation behind previous works [11][12][13][14][15][16][17][18][19][20][21][22]. However, contradictory results between the improvement [15-19, 20, 22] and deterioration [21] of wear characteristics of HPT processed (HPTed) materials were obtained.…”

Section: Introductionmentioning

confidence: 99%

Wear properties of copper and copper composites powders consolidated by high-pressure torsion

Aal¹

2019

Friction

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The wear characteristics of Cu and Cu-SiC composite microsize powders consolidated by cold compaction combined with sintering or high-pressure torsion (HPT) were investigated. The HPT processed (HPTed) samples with bimodal and trimodal microstructures and fine Cu grains and SiC particle sizes have superior hardness, reasonable ductility level, and high wear resistance. The wear mass loss and coefficient of friction of HPTed samples were remarkably lower than that of cold-compacted and sintered samples as well as that of micro and nano Cu and Cu-SiC composites from previous studies. The sample fabrication method has an apparent influence on the wear mechanism. The wear mechanism was converted from adhesive, delamination, three-body mechanism, grooves (take off the SiC particles), and cracks into abrasive wear after HPT. Oxidization can be considered a dominant wear mechanism in all cases. The worn surface morphology and analysis support the relationship between wear mechanism and characteristics.

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The effect of the pre-homogenization treatment on the fracture characteristics and wear properties of ECAPed Al–Cu alloys

Cited by 20 publications

References 30 publications

Molecular dynamics simulations on the melting, crystallization, and energetic reaction behaviors of Al/Cu core-shell nanoparticles

Molecular dynamics simulations on the melting, crystallization, and energetic reaction behaviors of Al/Cu core-shell nanoparticles

Effect of PTCAP Passes on the Mechanical Properties of Copper Tubes

Wear properties of copper and copper composites powders consolidated by high-pressure torsion

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