Influence of process control agent on interdiffusion between Al and Mg during mechanical alloying

1999 ◽  
Vol 290 (1-2) ◽  
pp. 279-283 ◽  
Author(s):  
Li Lu ◽  
Y.F. Zhang
Keyword(s):  
Process Control ◽  
Mechanical Alloying ◽  
Control Agent ◽  
Process Control Agent

scholarly journals Role of Sn as a Process Control Agent on Mechanical Alloying Behavior of Nanocrystalline Titanium Based Powders

Materials ◽  
2020 ◽  
Vol 13 (9) ◽  
pp. 2110
Author(s):  
Izabela Matuła ◽  
Maciej Zubko ◽  
Grzegorz Dercz
Keyword(s):  
Process Control ◽  
Mechanical Alloying ◽  
Control Agent ◽  
Milling Process ◽  
Nanocrystalline Phase ◽  
X Ray Diffraction ◽  
Process Control Agent ◽  
Backscattered Electrons ◽  
Nanocrystalline Titanium

In this study, the effects of Sn as a process control agent (PCA) on the final powder sizes, morphology, homogenization and alloying process of a new titanium alloy were investigated. Two kinds of powders, Ti10Ta8Mo and Ti10Ta8Mo3Sn (wt %), were prepared using a mechanical alloying process. For the Ti10Ta8Mo3Sn (wt %) alloy, the Sn element was used as PCA to enhance the milling process in the planetary ball mill. The milling process of both compositions was carried out with 200 rpm for 10, 15, 20, 40, 60, 80 and 100 h. The results confirmed that using Sn as a process control agent can result in a relatively good size distribution and better yield performance compared to samples without Sn addition. The phase analysis using X-ray diffraction proved the formation of the α nanocrystalline phase and the partial phase transformation from α to nanocrystalline β phases of both alloy compositions. The Scaning Electron Micoscope- Backscattered Electrons SEM-BSE results confirmed that the use of Sn as the PCA can provide a better homogenization of samples prepared by at least 60 h of ball milling. Furthermore, the presence of Sn yielded the most uniform, spheroidal and finest particles after the longest milling time.

scholarly journals Effects of Process Control Agent Amount, Milling Time, and Annealing Heat Treatment on the Microstructure of AlCrCuFeNi High-Entropy Alloy Synthesized through Mechanical Alloying

Metals ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1493
Author(s):  
Negar Yazdani ◽  
Mohammad Toroghinejad ◽  
Ali Shabani ◽  
Pasquale Cavaliere
Keyword(s):  
Solid Solution ◽  
Process Control ◽  
Mechanical Alloying ◽  
Milling Time ◽  
Control Agent ◽  
High Entropy Alloy ◽  
Process Control Agent ◽  
Mechanically Alloyed ◽  
X Ray ◽  
High Entropy

This study was conducted to investigate the characteristics of the AlCrCuFeNi high-entropy alloy (HEA) synthesized through mechanical alloying (MA). In addition, effects of Process Control Agent (PCA) amount and milling time were investigated using X-ray diffraction analysis (XRD), scanning electron microscopy (SEM), and energy dispersive X-ray spectroscopy (EDS). The results indicated that the synthesized AlCrCuFeNi alloy is a dual phase (FCC + BCC) HEA and the formation of the phases is strongly affected by the PCA amount. A high amount of PCA postponed the alloying process and prevented solid solution formation. Furthermore, with an increase in the PCA amount, lattice strain decreased, crystallite size increased, and the morphology of the mechanically alloyed particles changed from spherical to a plate-like shape. Additionally, investigation of thermal properties and annealing behavior at different temperatures revealed no phase transformation up to 400 °C; however, the amount of the phases changed. By increasing the temperature to 600 °C, a sigma phase (σ) and a B2-ordered solid solution formed; moreover, at 800 °C, the FCC phase decomposed into two different FCC phases.

Effect of process control agent on alloying and mechanical behavior of L21 phase Ni–Ti–Al alloys

2019 ◽  
Vol 740-741 ◽  
pp. 130-136 ◽  
Author(s):  
Jun Shi ◽  
Aofeng Zheng ◽  
Zehui Lin ◽  
Rong Chen ◽  
Jugong Zheng ◽  
...  
Keyword(s):  
Process Control ◽  
Mechanical Behavior ◽  
Control Agent ◽  
Al Alloys ◽  
Process Control Agent

ROLE OF PROCESS CONTROL AGENT ON MECHANICAL ALLOYING OF NANO STRUCTURED TiAl-BASED ALLOY

2008 ◽  
Vol 22 (18n19) ◽  
pp. 2933-2938 ◽  
Author(s):  
H. BAHMANPOUR ◽  
S. HESHMATI-MANESH
Keyword(s):  
Process Control ◽  
Stearic Acid ◽  
Milled Powder ◽  
High Energy ◽  
Control Agent ◽  
X Ray Diffraction ◽  
Process Control Agent ◽  
Crystallite Sizes ◽  
Energy Ball ◽  
Milled Powders

High energy ball milling was performed on a mixture of titanium and aluminum elemental powders with a composition of Ti -48(at.%) Al . Stearic acid was added to this powder mixture as a process control agent (PCA) to study its effect on the microstructure evolution and crystallite size of the milled powder after various milling times. Phase compositions and morphology of the milled powders were evaluated using X-ray diffraction and scanning electron microscopy. Crystallite sizes of milled powders were determined by Cauchy-Gaussian approach using XRD profiles. It was shown that addition of 1wt.% of stearic acid not only minimizes the adhesion of milling product to the vial and balls, but also reduces its crystallite sizes. It has also a marked effect on the morphology of the final product.

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