The effects of milling time and heat treatment on the micro-structural and magnetic behavior of Fe42Ni28Zr8Ta2B10C10 synthesized by mechanical alloying

2013 ◽  
Vol 335 ◽  
pp. 53-58 ◽  
Author(s):  
M.A. Nowroozi ◽  
H. Shokrollahi
Keyword(s):  
Heat Treatment ◽  
Mechanical Alloying ◽  
Milling Time ◽  
Magnetic Behavior

scholarly journals Correlations between Structural and Hardness of Fe-50%Al Coating Prepared by Mechanical Alloying

2019 ◽  
Vol 1 (2) ◽  
Author(s):  
Didik Aryanto ◽  
Toto Sudiro ◽  
Agus Sukarto Wismogroho
Keyword(s):  
Heat Treatment ◽  
Carbon Steel ◽  
Mechanical Alloying ◽  
Lamellar Structure ◽  
Milling Time ◽  
Intermetallic Phase ◽  
Low Carbon Steel ◽  
Low Carbon ◽  
Before And After ◽  
Al Coating

Fe-50%Al coatings were deposited on the surface of low-carbon steel using mechanical alloying technique atdifferent milling times. The correlation between structure and hardness of coating before and after heat treatment wasinvestigated. At the milling time of less than 180 min, the coating has an elongated lamellar structure. The size of elongatedlamellar structure decreased with increasing milling times which led to an increase in the hardness value of coating. Afterheat treatment, the coating transformed to FeAl intermetallic phase with a denser structure and uniform in the composition. Itaffected the hardness of coating. The hardness value of all samples after heat treatment was higher than coating after milling.The hardness of coating was strongly influenced by the morphology and phase of coating.

Fabrication and Microstructure of Fe-Al Intermetallic Compound Powders by Mechanical Alloying

2010 ◽  
Vol 658 ◽  
pp. 356-359
Author(s):  
Tao Jiang ◽  
Hai Yun Jin
Keyword(s):  
Heat Treatment ◽  
Phase Composition ◽  
Intermetallic Compound ◽  
Mechanical Alloying ◽  
Treatment Process ◽  
Milling Time ◽  
Heat Treatment Process ◽  
The Mean ◽  
Xrd Patterns ◽  
Fe3al Intermetallic

The Fe-Al intermetallic compound powders were fabricated by mechanical alloying and heat treatment process. In this research, the phase composition and microstructure of the Fe-Al intermetallic compound powders produced by different milling time and heat treatment at 800oC and 1000oC were investigated. The XRD patterns results showed that the Fe-Al intermetallic compound powders were fabricated by mechanical alloying for 60h. After heat treatment at 800oC and 1000oC, the Fe-Al intermetallic compound powders transformed into the Fe3Al powders. With the increase of milling time, the mechanical alloying extent of Fe-Al intermetallic compound powders would be increased remarkably, and the particles sizes decreased remarkably. The microstructure showed that the mean particles size of the Fe-Al intermetallic compound powders after milling for 60h was rather fine and about 4-5μm. The microstructures showed that mean particles size of the Fe3Al intermetallic compound powders produced by heat treatment at 800oC and 1000oC was also about 4-5μm.

Investigation of Fabrication and Microstructure of the Fe3Al Intermetallics Compounds Bulks by Hot-Pressing Process

2011 ◽  
Vol 183-185 ◽  
pp. 1707-1711
Author(s):  
Tao Jiang
Keyword(s):  
Heat Treatment ◽  
Phase Composition ◽  
Mechanical Alloying ◽  
Relative Density ◽  
Hot Pressing ◽  
Milling Time ◽  
High Relative Density ◽  
Pressing Process ◽  
The Mean ◽  
Xrd Patterns

The Fe3Al intermetallics compounds bulks were fabricated by hot-pressing process in this research. The Fe3Al intermetallics compounds powders were fabricated by mechanical alloying and heat treatment process. The phase composition and microstructure of the Fe3Al intermetallics compounds powders produced by mechanical alloying and heat treatment were investigated. The phase composition and microstructure of the Fe3Al intermetallics compounds bulks produced by hot-pressing process were investigated. The XRD patterns results showed that the Fe-Al intermetallics compounds powders were fabricated by mechanical alloying for 60h. Then the Fe3Al intermetallics compounds powders were fabricated by heat treatment at 800°C and 1000°C. The microstructure showed that the mean particles sizes of the Fe-Al intermetallics compounds powders produced by mechanical alloying decreased remarkably with the increase of milling time. The microstructure showed that the mean particles size of the Fe3Al intermetallics compounds powders produced by mechanical alloying for 60h and heat treatment was rather fine and about 4-5μm. The Fe3Al intermetallics compounds bulks were fabricated by hot-pressing process at 1100°C for 2h under the pressure of 35MPa. The XRD patterns results showed that there existed only Fe3Al intermetallics compounds phase in the sintered bulks. The Fe3Al intermetallics compounds bulks exhibited the homogenous and compact microstructure. The mean particles size of the Fe3Al intermetallics compounds was rather fine and about 2-3μm. The relative density of the Fe3Al intermetallics compounds sintered bulks was about 99.2%. So the Fe3Al intermetallics compounds bulks with the high relative density were fabricated by hot-pressing process.

Phase Changes in Fe-Si Powder Mixtures by Mechanical Alloying and Subsequent Heat Treatment

2007 ◽  
Vol 280-283 ◽  
pp. 1709-1712
Author(s):  
Y. Zhao ◽  
Qiang Shen ◽  
Chuan Bin Wang ◽  
Lian Meng Zhang
Keyword(s):  
Heat Treatment ◽  
Solid Solution ◽  
Mechanical Alloying ◽  
Milling Time ◽  
Phase Changes ◽  
Main Phase ◽  
Powder Mixtures ◽  
Treatment Processes ◽  
Heat Treated ◽  
Composition And Structure

In the present study, Fe and Si powders (3:1 in atomic proportion) were mechanical alloyed and subsequently treated under different anneal conditions. The changes of phase composition and structure during the mechanical alloying and following heat treatment processes were mainly studied. The results showed that the XRD peaks of Fe were gradually broadened and weakened with the increase of the milling time associated with the shifting from low angles to high angles, and the main phase changed into α-Fe (Si) solid solution after milling for 20h. When the product was heat treated below 400oC, the main phase remained α-Fe (Si). While it was treated above 400oC, ordered Fe3Si phase was found and the XRD peaks of Fe3Si became sharper with the further increase of the temperature.

Mechanical properties of FeAlSi powders prepared by mechanical alloying from different initial feedstock materials

2019 ◽  
Vol 107 (2) ◽  
pp. 207 ◽  
Author(s):  
Jaroslav Čech ◽  
Petr Haušild ◽  
Miroslav Karlík ◽  
Veronika Kadlecová ◽  
Jiří Čapek ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Mechanical Alloying ◽  
Young’S Modulus ◽  
Milling Time ◽  
Young's Modulus ◽  
Element Model ◽  
X Ray Diffraction ◽  
X Ray ◽  
Powder Particles ◽  
Complete Homogenization

FeAl20Si20 (wt.%) powders prepared by mechanical alloying from different initial feedstock materials (Fe, Al, Si, FeAl27) were investigated in this study. Scanning electron microscopy, X-ray diffraction and nanoindentation techniques were used to analyze microstructure, phase composition and mechanical properties (hardness and Young’s modulus). Finite element model was developed to account for the decrease in measured values of mechanical properties of powder particles with increasing penetration depth caused by surrounding soft resin used for embedding powder particles. Progressive homogenization of the powders’ microstructure and an increase of hardness and Young’s modulus with milling time were observed and the time for complete homogenization was estimated.

scholarly journals Influence of V and Heat Treatment on Characteristics of WMoNbTaV Refractory High-Entropy Alloy Coatings by Mechanical Alloying

Coatings ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 265
Author(s):  
Chun-Liang Chen ◽  
Sutrisna
Keyword(s):  
Heat Treatment ◽  
Mechanical Alloying ◽  
Annealing Treatment ◽  
High Energy ◽  
304 Stainless Steel ◽  
Homogeneous Distribution ◽  
High Entropy Alloy ◽  
Solid Solution Phase ◽  
High Entropy ◽  
Steel Substrates

Refractory high-entropy alloy (RHEA) is one of the most promising materials for use in high-temperature structural materials. In this study, the WMoNbTaV coatings on 304 stainless steel substrates has been prepared by mechanical alloying (MA). Effects of V addition and subsequent heat treatment on properties of the WMoNbTaV coatings were investigated. The results show that the RHEA coatings with nanocrystalline body-centered cubic (BCC) solid-solution phase were generated by the mechanical alloying process. The presence of the V element promotes a uniform microstructure and homogeneous distribution of composition in the RHEA coatings due to improving alloying efficiency, resulting in an increase of hardness. After the annealing treatment of the RHEA coatings, microstructure homogeneity was further enhanced; however, the high affinity of Ta for oxygen causes the formation of Ta-rich oxides. Annealing also removes strain hardening generated by high-energy ball milling and thus decreases the hardness of the RHEA coating and alters microstructure evolution and mechanical properties.

Development of Biodegradable Mg-Ti Alloy Synthesized Using Mechanical Alloying

2016 ◽  
Vol 1133 ◽  
pp. 75-79 ◽  
Author(s):  
Emee Marina Salleh ◽  
Sivakumar Ramakrishnan ◽  
Zuhailawati Hussain
Keyword(s):  
Mechanical Alloying ◽  
Milling Time ◽  
Milled Powder ◽  
Milling Process ◽  
Planetary Mill ◽  
Ti Alloy ◽  
X Ray Diffraction ◽  
Argon Flow ◽  
Diffraction Patterns ◽  
Ti Powder

The aim of this work was to study the effect of milling time on binary magnesium-titanium (Mg-Ti) alloy synthesized by mechanical alloying. A powder mixture of Mg and Ti with the composition of Mg-15wt%Ti was milled in a planetary mill under argon atmosphere using a stainless steel container and balls. Milling process was carried out at 400 rpm for various milling time of 2, 5, 10, 15 and 30 hours. 3% n-heptane solution was added prior to milling process to avoid excessive cold welding of the powder. Then, as-milled powder was compacted under 400 MPa and sintered in a tube furnace at 500 °C in argon flow. The refinement analysis of the x-ray diffraction patterns shows the presence of Mg-Ti solid solution when Mg-Ti powder was mechanically milled for 15 hours and further. Enhancements of Mg-Ti phase formation with a reduction in Mg crystallite size were observed with the increase in milling time. A prolonged milling time has increased the density and hardness of the sintered Mg-Ti alloy.

Magnetic Characteristics of CuCr2S4Nanospinels Obtained by Mechanical Alloying and Heat Treatment

2017 ◽  
Vol 53 (11) ◽  
pp. 1-5 ◽  
Author(s):  
E. Maciazek ◽  
E. Malicka ◽  
M. Karolus ◽  
J. Panek ◽  
Z. Stoklosa ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Mechanical Alloying ◽  
Magnetic Characteristics
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