scholarly journals STUDY OF ALUMINUM ALLOY ROLLING OIL ANTIFRICTION PROPERTIES BY ULTIMATE REDUCTION METHOD

2021 ◽  
pp. 63-67
Author(s):  
V.A. Leventsov ◽  
A.N. Leventsov
Keyword(s):  
Aluminum Alloy ◽  
Reduction Method ◽  
Antifriction Properties ◽  
Rolling Oil

scholarly journals Tribological Properties of Ni-P/Si3N4 Nanocomposite Layers Deposited by Chemical Reduction Method on Aluminum Alloy AW-7075

Materials ◽  
2020 ◽  
Vol 13 (24) ◽  
pp. 5797
Author(s):  
Kazimierz Czapczyk
Keyword(s):  
Aluminum Alloy ◽  
Abrasive Wear ◽  
Reduction Method ◽  
Chemical Reduction ◽  
Contact Method ◽  
7075 Aluminum Alloy ◽  
Chemical Reduction Method ◽  
Phase Layer ◽  
Dispersion Phase ◽  
7075 Alloy

The article presents the results of tribological tests of Ni-P/Si3N4 nanocomposite and Ni-P nickel layers deposited on the AW-7075 aluminum alloy by chemical reduction method, and the AW-7075 alloy without coating. Nanocomposite layers were produced using Si3N4 siliconnitride in the form of a polydisperse powder whose particle sizes ranged from 20 to 25 nm. The influence of the content of the dispersion phase layer material on the abrasive wear, which was determined as the “ball on disc” method, was analyzed. Surface topography was examined by the contact method using a profilometer. The purpose of introducing Si3N4 particles into the Ni-P layer was to increase the wear resistance of AW-7075 aluminum alloy parts with an embedded nanocomposite coating. Based on the obtained test results, it was found that the Ni-P/Si3N4 layers are more resistant to wear than the Ni-P layers and the AW-7075 alloy layers, and are a good barrier against abrasive wear at various loads and environmental conditions.

Interactions Between Rolling Oil Emulsions and Aluminum Alloy Surfaces

1984 ◽  
Vol 27 (3) ◽  
pp. 203-206 ◽  
Author(s):  
F. E. Lockwood ◽  
K. Bridger ◽  
M. E. Tadros
Keyword(s):  
Aluminum Alloy ◽  
Rolling Oil ◽  
Oil Emulsions

The influence of thickness of Ni-P layers produced on AW-7075 aluminum alloy on their adhesion and mechanical properties

2018 ◽  
Vol 23 (1) ◽  
pp. 18-26
Author(s):  
Kazimierz Czapczyk ◽  
Stanisław Legutko ◽  
Piotr Siwak ◽  
Karol Grochalski ◽  
Anna Mazurek
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
Light Microscopy ◽  
Layer Thickness ◽  
Reduction Method ◽  
Chemical Reduction ◽  
Mechanical Tests ◽  
7075 Aluminum Alloy ◽  
Chemical Reduction Method ◽  
7075 Alloy

The article presents the results of mechanical tests of Ni-P layers deposited by the chemical reduction method on the AW-7075 aluminum alloy. The effect of layer thickness on hardness and microhardness of Vickers, which was determined by the DSI method, and their adhesion to the substrate by scratch method were investigated. The morphology was obtained using light microscopy and the topography of the examined layers using a contact profilometer. Different thicknesses were used to determine their effect on adhesion of the leyers to AW-7075 alloy. The results allowed to state that Ni-P layers of higher thickness are characterized by higher hardness and Young's modulus values than thinner Ni-P layers, and also show better adhesion to the AW-7075 alloy.

scholarly journals Modification of surface layer in aluminum alloys by electroerosion coating

2016 ◽  
Vol 1 (4) ◽  
pp. 14-21
Author(s):  
А. Норман ◽  
A. Norman ◽  
В. Смоленцев ◽  
V. Smolentsev ◽  
В. Золотарев ◽  
...  
Keyword(s):  
Surface Layer ◽  
Aluminum Alloy ◽  
Cast Iron ◽  
Aluminum Alloys ◽  
Coating Process ◽  
Fusion Temperature ◽  
Friction Units ◽  
Antifriction Properties ◽  
Iron Coatings ◽  
Active Substances

The mechanism of plating on low-melting alloys (for example, aluminum) cast-iron coatings having a high fusion temperature is considered. By means of this method one achieves in light aluminum alloy parts higher performance attributes to which belong reliable protection of parts with a coating against aggressive influence of chemically active substances. Besides, antifriction properties of parts operating in friction units are improved. The technological modes are developed and a coating process is designed. The example of the method offered is shown.

Effect of Increasing Salinity to Corrosion Resistance of 5052 Aluminum Alloy in Artificial Seawater

2019 ◽  
Vol 961 ◽  
pp. 107-111
Author(s):  
Agung Setyo Darmawan ◽  
Waluyo Adi Siswanto ◽  
Pramuko Ilmu Purboputro ◽  
Agus Dwi Anggono ◽  
Masyrukan ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Aluminum Alloy ◽  
Corrosion Rate ◽  
Reduction Method ◽  
Sea Water ◽  
Salt Spray ◽  
Test Chamber ◽  
Nacl Solution ◽  
Corrosion Medium ◽  
Water Salt

The purpose of this research is to investigate the corrosion resistance of 5052 aluminum alloy to increasing salinity in sea water. Salt spray chamber was used to measure and compare the corrosion rate of 5052 aluminum alloy with weight reduction method. The experiment was conducted by varying the three concentrations of NaCl solution to compare the corrosion rate of the metal. The test specimens used were aluminum alloy 5052 with length of 6 cm, width of 4 cm and thickness of 0.7 cm. The tests were carried out for 48 hours, aggressive NaCl solutions with concentrations of 3.5%, 4% and 5% were used as an artificial sea water corrosion medium and the temperature in the test chamber was maintained at 35 °C. Corrosion rate for 3.5% NaCl solution, 4% NaCl solution and 5% NaCl solution were 0.197 mm/year, 0.541 mm/year and 0.558 mm/year, respectively. The higher concentration leads to greater corrosion rate.

Techniques for Transmission Electron Microscopy of Fiber-Matrix Interfaces in Aluminum Alloy-Boron Composites by Ion Erosio

1971 ◽  
Vol 29 ◽  
pp. 204-205
Author(s):  
G. G. Shaw
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Aluminum Alloy ◽  
Electron Beam ◽  
Pure Aluminum ◽  
Ion Milling ◽  
Transmission Electron ◽  
Fiber Matrix ◽  
Ion Erosion ◽  
Row Of Fibers

The morphology and composition of the fiber-matrix interface can best be studied by transmission electron microscopy and electron diffraction. For some composites satisfactory samples can be prepared by electropolishing. For others such as aluminum alloy-boron composites ion erosion is necessary.When one wishes to examine a specimen with the electron beam perpendicular to the fiber, preparation is as follows: A 1/8 in. disk is cut from the sample with a cylindrical tool by spark machining. Thin slices, 5 mils thick, containing one row of fibers, are then, spark-machined from the disk. After spark machining, the slice is carefully polished with diamond paste until the row of fibers is exposed on each side, as shown in Figure 1.In the case where examination is desired with the electron beam parallel to the fiber, preparation is as follows: Experimental composites are usually 50 mils or less in thickness so an auxiliary holder is necessary during ion milling and for easy transfer to the electron microscope. This holder is pure aluminum sheet, 3 mils thick.

Type -Reduction Method on Fuzzy Critical Path

2019 ◽  
Vol 7 (1) ◽  
pp. 256-259
Author(s):  
P.Balasowandari ◽  
Dr. V.Anusuya
Keyword(s):  
Reduction Method ◽  
Critical Path ◽  
Type Reduction
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