The Rotational Extrusion Alloying Al-Ti Composite

2012 ◽  
Vol 268-270 ◽  
pp. 92-95
Author(s):  
Wei Ping Xu ◽  
Li Ming Ke ◽  
Li Xing
Keyword(s):  
Ball Mill ◽  
High Speed ◽  
Welding Process ◽  
High Energy ◽  
Stable Phase ◽  
Friction Stir ◽  
Pole Figures ◽  
High Energy Ball Mill ◽  
Energy Ball ◽  
Extrusion Technology

The Rotating Extrusion Alloying (REA) is a process which combined friction stir welding process and extrusion technology. In the REA process, dissimilar metals are mixed, cracked, and subjected to high speed, severe pressing deformation, and therefore rapidly alloy at a low temperature. The Al-Ti alloy has been prepared by REA. The result shows that during REA process, the original materials and the products after synthesis present high energy ball mill and from sintering the compound are avoided, and the contamination to the compound due to the contact with the surrounding atmosphere and high energy balls disappear. REA technology can be alloyed Al-Ti material. Its phases are mainly composed of Al and Al3Ti, which are distributed more evenly in the aluminum. After heat treatment, its phases’ types and pole figures have no significant change, but there is a trend of transition to the non-equilibrium stable phase. Small-angle grain boundaries decrease or even disappear.

The Rotational Extrusion Alloying

2013 ◽  
Vol 664 ◽  
pp. 521-524
Author(s):  
Wei Ping Xu ◽  
Li Ming Ke ◽  
Li Xing
Keyword(s):  
Heat Treatment ◽  
Friction Stir Welding ◽  
Low Temperature ◽  
High Speed ◽  
Welding Process ◽  
Stable Phase ◽  
Dissimilar Metals ◽  
Friction Stir ◽  
Pole Figures ◽  
Extrusion Technology

The Rotating Extrusion Alloying (REA) is a process which combined friction stir welding process and extrusion technology. In the REA process, dissimilar metals are mixed, cracked, and subjected to high speed, severe pressing deformation, and therefore rapidly alloy at a low temperature. The result shows that REA technology can be alloyed Al-Ti material. Its phases are mainly composed of Al and Al3Ti, which are distributed more evenly in the aluminum. After heat treatment, its phases’ types and pole figures have no significant change, but there is a trend of transition to the non-equilibrium stable phase. Small-angle grain boundaries decrease or even disappear.

A Study of Exchange-Coupling Effect on Nd2Fe14B / α-Fe Forming Core/Shell Shape

2007 ◽  
Vol 119 ◽  
pp. 147-150 ◽  
Author(s):  
Chang Woo Kim ◽  
Young Hwan Kim ◽  
Don Keun Lee ◽  
In Chul Jeong ◽  
Hae Woong Kwon ◽  
...  
Keyword(s):  
Exchange Coupling ◽  
Ball Mill ◽  
Coupling Effect ◽  
Chemical Reduction ◽  
High Energy ◽  
Shell Shape ◽  
Core Shell ◽  
High Energy Ball Mill ◽  
Energy Ball ◽  
Mill Process

We report the core/shell type as the interesting one of the various techniques to prepare exchange-coupled permanent magnet. In this study, the exchange-coupled Nd2Fe14B/α-Fe was prepared by high energy ball mill process and chemical reduction. Nd15Fe77B8 powder prepared by high energy ball mill process was coated with α-Fe nanoparticle by chemical reduction. α-Fe nanoparticle on the ball milled Nd15Fe77B8 was synthesized by chemical reduction with borohydride as a reducing agent in aqueous solution. After annealing, Nd2Fe14B/α-Fe forming core/shell shape has exchange-coupling effect and was identified by using XRD, FE-SEM, VSM, TMA and EDX.

Technological Aspects of Fe-Al-Si Intermetallic Alloy Preparation by Mechanical Alloying

2019 ◽  
Vol 810 ◽  
pp. 101-106 ◽  
Author(s):  
Petr Haušild ◽  
Jaroslav Čech ◽  
Veronika Kadlecová ◽  
Miroslav Karlík ◽  
Filip Průša ◽  
...  
Keyword(s):  
Mechanical Alloying ◽  
Ball Mill ◽  
High Energy ◽  
Intermetallic Alloy ◽  
Alloyed Powder ◽  
Temperature Oxidation ◽  
High Energy Ball Mill ◽  
Speed Up ◽  
Energy Ball ◽  
Kinetics Of

In this paper, recently developed ternary FeAl20Si20 (wt.%) alloy with promising high-temperature oxidation and wear resistance was prepared by mechanical alloying in a high-energy ball mill. The possibility to speed-up the mechanical alloying process by replacing aluminium (and partly silicon) elemental powder by the pre-alloyed powder (AlSi30) with relatively fine dispersion of Si in the Al-Si eutectic was examined. The microstructure, phase composition and mechanical properties after various time of mechanical alloying were characterized. The effect of using the pre-alloyed powders on kinetics of mechanical alloying is compared with the results obtained on batches prepared from elemental powders.

Synthesis of Al5083 Alloy by High Energy Ball Mill and Densification through Equal Channel Angular Pressing (ECAP)

2019 ◽  
Vol 969 ◽  
pp. 68-72
Author(s):  
K. Chandra Sekhar ◽  
Balasubramanian Ravisankar ◽  
S. Kumaran
Keyword(s):  
Electron Microscopy ◽  
Electron Microscope ◽  
Ball Mill ◽  
High Energy ◽  
Mechanically Alloyed ◽  
Channel Angle ◽  
Angular Pressing ◽  
High Energy Ball Mill ◽  
Energy Ball ◽  
Scanning Electron

An attempt was made to synthesis Al-5083alloy through high energy ball milling and densification through ECAP. The elemental powders consisting of Al5083 was milled for 5, 10 and 15 hrs using Retsch high energy ball mill (PM400). The physical and structural properties of mechanically alloyed particulates were characterised by diffraction methods and electron microscopy. The 15hrs nanocrystalline structured particulates of Al5083 alloy shows crystallite size of 15nm. Scanning Electron Microscope (SEM) reveals the morphology of alloy which is irregular shaped. The size of alloyed particulates also measured using SEM and found to be 7μm for 15hrs of milling. The 15hr milled alloy particulates were densified by ECAP through 90o die channel angle. Maximum densification of 92% and highest hardness of 63HRB was achieved for sample consolidated with route-A for two passes along with sintering.

Dispersion of silicon carbide nanoparticles in a AA2024 aluminum alloy by a high-energy ball mill

2014 ◽  
Vol 586 ◽  
pp. S68-S72 ◽  
Author(s):  
C. Carreño-Gallardo ◽  
I. Estrada-Guel ◽  
C. López-Meléndez ◽  
R. Martínez-Sánchez
Keyword(s):  
Silicon Carbide ◽  
Aluminum Alloy ◽  
Ball Mill ◽  
High Energy ◽  
Silicon Carbide Nanoparticles ◽  
High Energy Ball Mill ◽  
Energy Ball

High energy ball-mill behavior of titania+hydroxyapatite composite nano-powders

2010 ◽  
Vol 61 (11) ◽  
pp. 1290-1293 ◽  
Author(s):  
Jung G. Lee ◽  
S.M. Hong ◽  
J.J. Park ◽  
M.K. Lee ◽  
S.J. Hong ◽  
...  
Keyword(s):  
Ball Mill ◽  
High Energy ◽  
High Energy Ball Mill ◽  
Hydroxyapatite Composite ◽  
Energy Ball

scholarly journals Effect of process variables on synthesis of MgB2by a high energy ball mill

2016 ◽  
Vol 8 ◽  
pp. 01007
Author(s):  
Haldun Kurama ◽  
Savaş Erkuş ◽  
Hakan Gaşan
Keyword(s):  
Ball Mill ◽  
High Energy ◽  
Process Variables ◽  
High Energy Ball Mill ◽  
Energy Ball
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