scholarly journals Solid particle erosion response of aluminum reinforced with tungsten carbide nanoparticles and aluminide particles

2018 ◽  
Vol 188 ◽  
pp. 03002
Author(s):  
Ekaterini Chantziara ◽  
Konstantinos Lentzaris ◽  
Angeliki G. Lekatou ◽  
Alexander E. Karantzalis
Keyword(s):  
Solid Particle ◽  
Aluminum Matrix ◽  
Morphological Characteristics ◽  
Aluminum Matrix Composites ◽  
Solid Particle Erosion ◽  
Matrix Composites ◽  
Particle Erosion ◽  
Main Concept ◽  
Mechanical Stirring ◽  
Impact Angles

The main concept behind this work is to further enhance the attractive properties of aluminum by fabricating Al - WC composites and evaluating them in terms of their solid particle erosion response. Aluminum Matrix Composites (AMCs) were produced by the addition of submicron sized WC particles (up to 2.5vol %) into a melt of Al1050. Casting was assisted by the use of K2TiF6 as a wetting agent and mechanical stirring in order to minimize particle clustering. Extensive presence of in-situ intermetallic phases (Al4W, Al5W, Al12W, Al3(Ti,W), Al3Ti) was observed in the cast products. Particle distribution was reasonably uniform comprising both clusters and isolated particles. Solid particle erosion experiments were carried out for impact angles of 30°, 60° and 90°, using angular Al2O3 particles as the eroding medium and under 5 bar spraying pressure. The erosion rate was calculated by measuring the mass loss and the eroded surfaces were examined with SEM-EDX. Increased erosion resistance was observed for low particle additions (≤ 1.0 vol%WC). Finally, a possible erosion mechanism was proposed based on the material’s microstructural and morphological characteristics.

scholarly journals Effect of Wetting Agent and Carbide Volume Fraction on the Wear Response of Aluminum Matrix Composites Reinforced by WC Nanoparticles and Aluminide Particles

2017 ◽  
Vol 62 (2) ◽  
pp. 1235-1242 ◽  
Author(s):  
A. Lekatou ◽  
N. Gkikas ◽  
A.E. Karantzalis ◽  
G. Kaptay ◽  
Z. Gacsi ◽  
...  
Keyword(s):  
Sliding Wear ◽  
Volume Fraction ◽  
Aluminum Matrix ◽  
Wetting Agent ◽  
Salt Flux ◽  
Ex Situ ◽  
Aluminum Matrix Composites ◽  
Matrix Composites ◽  
Mechanical Stirring ◽  
Wear Response

AbstractAluminum matrix composites were prepared by adding submicron sized WC particles into a melt of Al 1050 under mechanical stirring, with the scope to determine: (a) the most appropriate salt flux amongst KBF4, K2TiF6, K3AlF6and Na3AlF6for optimum particle wetting and distribution and (b) the maximum carbide volume fraction (CVF) for optimum response to sliding wear. The nature of the wetting agent notably affected particle incorporation, with K2TiF6providing the greatest particle insertion. A uniform aluminide (in-situ) and WC (ex-situ) particle distribution was attained. Two different sliding wear mechanisms were identified for low CVFs (≤1.5%), and high CVFs (2.0%), depending on the extent of particle agglomeration.

scholarly journals Improved Erosion Resistance by HVOF Sprayed 10%Al2O3-COCrAlTaY Coating on Ti-31

2020 ◽  
Vol 8 (5) ◽  
pp. 1605-1610 ◽  
Keyword(s):  
Solid Particle ◽  
Material Removal ◽  
Research Work ◽  
Solid Particle Erosion ◽  
Particle Erosion ◽  
Air Jet ◽  
Ductile Mode ◽  
Erosion Test ◽  
Impact Angles ◽  
Brittle Mode

In this present research work the solid particle erosion test carried on uncoated samples (Ti-31), and HVOF sprayed 10%Al2O3 -CoCrAlTaY on Ti-31 are made. Erosion test are done with impact angles of 30º, 60º and 90º. Solid particle erosion studies were carried out using air jet erosion test rig as per ASTM G76-02 standard.All the three angles of uncoated alloys exhibit erosion damage under ductile mode and less amount of erosive loss compared HVOF coated samples. The HVOF sprayed coated Ti-31 at various impact angles is brittle mode. The mechanism of material removal during erosion of brittle materials is explained by using SEM micrographs.

Evaluation of Solid Particle Erosion Damage on E-Glass/Epoxy Composites Using Acoustic Emission Activity

2005 ◽  
Author(s):  
N. H. Yang ◽  
H. Nayeb-Hashemi
Keyword(s):  
Acoustic Emission ◽  
Solid Particle ◽  
Residual Strength ◽  
Epoxy Composites ◽  
Distribution Model ◽  
Solid Particle Erosion ◽  
Particle Erosion ◽  
Damage Mechanisms ◽  
Erosion Damage ◽  
Impact Angles

The effect of solid particle erosion on the strength properties of E-glass/epoxy composite was investigated. Solid particle erosion with SiC particles 400 μm to 500 μm in diameter was simulated on 12 ply [45°/−45°/0°/45°/−45°/0°]s E-glass/epoxy composites with constant particle velocity of 42.5 m/s at impact angles of 90°, 60°, and 30° for 30, 60, 90 and 120 seconds. Damaged and undamaged specimens were subjected to tensile tests while monitoring their acoustic emission (AE) activity. An erosion damage parameter was defined as a function of the particle impact angle and erosion duration to determine the residual tensile strength of the composite. Scanning electron microscope (SEM) images of the erosion damaged specimens revealed the same damage mechanism occurred at different impact angles. The distribution of AE events by event duration, ring down counts and energy distribution were used to characterize the different damage mechanisms that occurred during tensile loading of damaged and undamaged specimens. The results showed AE activity could be used to distinguish between different damage mechanisms within the composite, such as fiber/matrix debonding, delamination and fiber fracture. The Weibull probability distribution model and the AE stress delay parameter model were developed to relate the AE activity to the erosion damage and residual strength. The results showed both the Weibull probability model and the stress delay model could be used to predict residual strength of the composites.

The solid particle erosion of polymer matrix composites

Wear ◽  
1994 ◽  
Vol 171 (1-2) ◽  
pp. 149-161 ◽  
Author(s):  
Manish Roy ◽  
B. Vishwanathan ◽  
G. Sundararajan
Keyword(s):  
Solid Particle ◽  
Polymer Matrix ◽  
Polymer Matrix Composites ◽  
Solid Particle Erosion ◽  
Matrix Composites ◽  
Particle Erosion
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