Effect of heat treatment on the properties of mechanically alloyed Al-based materials

2007 ◽  
Vol 49 (11-12) ◽  
pp. 574-577 ◽  
Author(s):  
S. A. Kotov ◽  
V. D. Andreeva ◽  
S. V. Ganin ◽  
B. M. Freidin ◽  
Yu. V. Kuz’mich
Keyword(s):  
Heat Treatment ◽  
Mechanically Alloyed

Intermetallic Effects on the Ductility of Sintered Aluminium

2008 ◽  
Vol 587-588 ◽  
pp. 380-384
Author(s):  
Jesus Cintas ◽  
José A. Rodríguez ◽  
Francicso Gomez Cuevas ◽  
José M. Gallardo
Keyword(s):  
Heat Treatment ◽  
Particle Size ◽  
Intermetallic Particle ◽  
Quantitative Metallography ◽  
Mechanically Alloyed ◽  
Aluminium Powder ◽  
Attrition Milling ◽  
Different Temperatures ◽  
Alloyed Aluminium ◽  
Milled Powders

Mechanically alloyed aluminium powder was prepared by attrition-milling for 10 hours in the presence of a wax. Milled powders were annealed in vacuum at different temperatures (500, 575, 600, 625 and 650°C). Compacts were consolidated starting from unannealed and from 600°Cannealed powders. Studies by SEM microfractography and quantitative metallography, to investigate the influence of Fe-Al intermetallics on compacts fracture, have been carried out. It is concluded that fracture takes place at regions where the area occupied by the intermetallics is high and intermetallics particles are big. Intermetallic particle size can be controlled by an appropriated heat treatment.

scholarly journals Influence of Preparation Process on Microstructure, Critical Current Density and Tc of MgB2/Fe/Cu Wires

2007 ◽  
Vol 546-549 ◽  
pp. 2031-2034
Author(s):  
Y.F. Wu ◽  
G. Yan ◽  
J.S. Li ◽  
Y. Feng ◽  
Shao Kai Chen ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Current Density ◽  
Rolling Process ◽  
High Energy ◽  
Transport Current ◽  
Post Heat Treatment ◽  
Mechanically Alloyed ◽  
Mgb2 Wires ◽  
Powder In Tube ◽  
Transport Current Density

The powder-in-tube MgB2 wires were prepared by high energy milling of Mg and B powder. The powder was not mechanically alloyed for 2h short milling time. However, the MgB2 grains in wires were very small (20~100nm) and resemble the dimple after post-heat treatment. The clear evidence for transcrystlline fracture was observed. It indicated that the grain connection was greatly improved and the fluxing pinning was significantly enhanced. Another point to view was no intermediate annealing during the whole rolling process. The influence of the post-heat treatment on the transport current density was studied. Despite the lower Tc of about 35K, the transport current density reached to 3×104A/cm2 at 15K and 3.5T for wires sintered at 700°C.

Intermetallic phases produced by the heat treatment of mechanically alloyed AlMo powders

1994 ◽  
Vol 185 (1-2) ◽  
pp. 77-86 ◽  
Author(s):  
M. Zdujić ◽  
D. Poleti ◽  
Lj. Karanović ◽  
K.F. Kobayashi ◽  
P.H. Shingu
Keyword(s):  
Heat Treatment ◽  
Intermetallic Phases ◽  
Mechanically Alloyed

Structural evolution during heat treatment of mechanically alloyed Al–Cu–Fe–(Si) alloys

2001 ◽  
Vol 304-306 ◽  
pp. 822-829 ◽  
Author(s):  
Ki Buem Kim ◽  
Suk Hwan Kim ◽  
Won Tae Kim ◽  
Do-Hyang Kim ◽  
Kyung-Tae Hong
Keyword(s):  
Heat Treatment ◽  
Structural Evolution ◽  
Mechanically Alloyed

Mechanically alloyed Fe-Zr-(B,Cu) alloys: effect of composition and heat treatment on the microstructure and the magnetic properties

1996 ◽  
Vol 205-207 ◽  
pp. 620-623 ◽  
Author(s):  
C. Stiller ◽  
J. Eckert ◽  
S. Roth ◽  
R. Schäfer ◽  
U. Klement ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Magnetic Properties ◽  
Mechanically Alloyed ◽  
Cu Alloys

scholarly journals Structural Evolution of Nano-sized Oxide Particles Formed in Mechanically Alloyed Fe-10Cr-5Y2O3 Powders

Metals ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 310
Author(s):  
Ga Eon Kim ◽  
Tae Kyu Kim ◽  
Sanghoon Noh
Keyword(s):  
Heat Treatment ◽  
Phase Transformation ◽  
Mechanical Alloying ◽  
Morphological Change ◽  
Ball Mill ◽  
Structural Evolution ◽  
Oxide Phase ◽  
High Energy ◽  
Mechanically Alloyed ◽  
Oxide Particles

Fe-10Cr-5Y2O3 powders were mechanically alloyed using a high energy horizontal ball-mill apparatus, and the effect of heat treatment on the behavior of nano-sized oxide particles formed in the mechanically alloyed Fe-10Cr-5Y2O3 powders was investigated. Elongated Cr-rich and Y-rich oxides were observed in the mechanically alloyed powders. During the heating of these powders above 700 °C, the elongated Cr-rich oxides were dramatically changed to a near- spherical morphology. Cubic-Y2O3, monoclinic-Y2O3 and YFeO3 phases were also found after heat treatment at 1150 °C for 1h, indicating that the Y-rich oxide phase was transformed to the cubic-Y2O3, monoclinic-Y2O3 and YFeO3 ones. It is thus concluded that both a morphological change of Cr-rich oxide and a phase transformation of Y-rich oxide during the heating of mechanically alloyed powders could be mainly attributed to extremely high energy, accumulated by the mechanical alloying process.

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