Effect of Globular Microstructure on Cavitation Erosion Resistance of Aluminium Alloys

In this paper the effect of globular microstructure on the cavitation erosion resistance was assessed and compared to that of conventional dendritic one. Three different wrought aluminum alloys in as-cast conditions were investigated. The samples were completely characterized by metallographic analyses and microhardness measurements. Cavitation erosion tests were performed according to ASTM G 32 standard. The volume loss was evaluated during the test by periodical interruptions. It was identified the damaging mechanism in case of both dendritic and semisolid microstructure. It was also found that the globular microstructure increases the cavitation erosion resistance only for one of the studied alloys.

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Quantitative Evaluation of Cavitation Erosion

Journal of Fluids Engineering ◽

10.1115/1.2819644 ◽

1998 ◽

Vol 120 (1) ◽

pp. 179-185 ◽

Cited By ~ 39

Author(s):

Shuji Hattori ◽

Hiroyuki Mori ◽

Tsunenori Okada

Keyword(s):

Impact Energy ◽

Cavitation Erosion ◽

Erosion Resistance ◽

Impact Load ◽

Bubble Collapse ◽

Impact Loads ◽

Volume Loss ◽

Developed Pressure ◽

Cavitation Erosion Resistance ◽

The Impact

In order to evaluate the quantitative cavitation-erosion resistance of materials, a pressure-detector-installed specimen was developed, which can measure both the impact load produced by cavitation bubble collapse and the volume loss simultaneously. Test specimens (pressure-detection rod) used were nine kinds of metals and were exposed to vibratory cavitation. A linear relation was obtained for all materials between the accumulated impact energy ∑Fi2 calculated from the distribution of impact loads and the volume loss, independent of test conditions. Impact energy accumulated during the incubation period and the energy for a unit material removal in steady-state period were obtained from the relation. These values are very Important concerning quantitative erosion resistance evaluation. That is, when the distribution of impact loads is acquired for different cavitation conditions, the volume loss can be estimated. This idea was applied to the venturi cavitation erosion. The experimental results for venturi test corresponds well with the prediction using these impact energy values. It was concluded that the quantitative impact energy values of materials can be determined independent of the apparatus and the test condition by using the newly developed pressure-detector-installed specimen.

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Cavitation erosion resistance of the chosen aluminum alloys

MANUFACTURING TECHNOLOGY ◽

10.21062/ujep/x.2011/a/1213-2489/mt/11/1/22 ◽

2011 ◽

Vol 11 (1) ◽

pp. 22-28 ◽

Cited By ~ 2

Author(s):

Jasionowski Robert ◽

Podrez-Radziszewska Marzena ◽

Dariusz Zasada

Keyword(s):

Aluminum Alloys ◽

Cavitation Erosion ◽

Erosion Resistance ◽

Cavitation Erosion Resistance

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Cavitation erosion resistance of ZrC nanoceramic coating

Proceedings of the Institution of Mechanical Engineers Part J Journal of Engineering Tribology ◽

10.1177/1350650119873232 ◽

2019 ◽

Vol 234 (6) ◽

pp. 833-841 ◽

Cited By ~ 1

Author(s):

Hongqin Ding ◽

Shuyun Jiang ◽

Jiang Xu

Keyword(s):

Stainless Steel ◽

Electron Microscope ◽

Scanning Electron Microscope ◽

Cavitation Erosion ◽

Erosion Resistance ◽

Volume Loss ◽

Electrochemical Test ◽

316 Stainless Steel ◽

Cavitation Erosion Resistance ◽

Scanning Electron

A ZrC nanoceramic coating was prepared on the bare 316 stainless steel for improving the cavitation erosion resistance by the double glow discharge sputter technique. The phase constitution and surface microstructure of the ZrC nanoceramic coating were characterized by X-ray diffraction, scanning electron microscope, and transmission electron microscopy. A 10-µm-thick ZrC nanoceramic coating exhibited equiaxed grains with an average grain size of 9 nm. The adhesion strength and mechanical properties for the ZrC nanoceramic coating were evaluated by scratch test and nanoindentation. The hardness value of the ZrC nanoceramic coating was about four times that of the uncoated 316 stainless steel. The cavitation erosion behavior of the ZrC nanoceramic coating in tap water was characterized by the combination of an ultrasonic vibration system with an electrochemical workstation. The volume loss, erosion depth, scanning electron microscope morphology, and electrochemical test were adopted to assess the surface damage of the ZrC nanoceramic coating. The results show that the volume loss of the ZrC nanoceramic coating is 0.53 mm3, which is only 46% of the 316 stainless steel (1.14 mm3) after cavitation test, and erosion damage of the ZrC nanoceramic coating is significantly decreased as compared to the uncoated 316 stainless steel. The electrochemical test results also indicate that the ZrC nanoceramic coating shows higher corrosion resistance than the 316 stainless steel under cavitation erosion condition. Thus, the ZrC nanoceramic coating can be adopted to enhance the cavitation erosion resistance of the 316 stainless steel.

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Erosion of Powder Metallurgy Aluminum Alloys by Hot Propellant Gases

Journal of Engineering Materials and Technology ◽

10.1115/1.3443402 ◽

1977 ◽

Vol 99 (1) ◽

pp. 36-41

Author(s):

A. C. Alkidas ◽

A. M. Varney ◽

R. E. Shrader ◽

S. O. Morris ◽

M. Summerfield

Keyword(s):

High Pressure ◽

High Temperature ◽

Powder Metallurgy ◽

Aluminum Alloys ◽

Erosion Resistance ◽

Primary Mechanism ◽

Sintered Aluminum ◽

Combustible Gases ◽

Wrought Aluminum Alloys ◽

Wrought Aluminum

Experimental results are presented on the erosion of PMA (Powder Metallurgy Aluminum) alloys by a pulse of high pressure and high temperature combustible gases. The PMA alloys have been found to exhibit superior erosion resistance characteristics than wrought aluminum alloys. Of the PMA alloys tested, SAP materials (Sintered Aluminum Powder) were shown to be the best. The primary mechanism of the erosion of PMA alloys was found to be the melt and wipe off process. Combustion of aluminum that is responsible for the catastrophic erosion of wrought aluminum alloys was inhibited in PMA tests. Several hypotheses that explain erosion resistance of the PMA alloys have been postulated.

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