Erosive wear behaviour of aluminium based composites

Fang, Qiannan; Sidky, P.S.; Hocking, M. G.

doi:10.1016/s0261-3069(97)00081-2

Cited by 32 publications

(27 citation statements)

References 16 publications

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“…Figures 2a and 2b show that, as the erosive mass increased, the mass loss also increased, in compatibility with previous investigations [31][32][33][34][35]. It is well known that there is a dramatic difference in the response of ductile and brittle materials when the mass loss in erosion is measured as a function of the angle of impact.…”

Section: Resultssupporting

confidence: 89%

“…Material removal takes place more easily at a relatively low impact angle (60°) owing to ploughing and cutting by theAl 2 O 3 particle flow. At a higher impingement angle (90°), however, the impact of theAl 2 O 3 particle flow on the specimen surface may result in work hardening of the surface, higher subsurface deformation, less efficient ploughing and cutting, and thus, less material removal, as also observed by previous researchers [32,41]. Erosion mainly occurs by propagation and intersection of cracks caused by impacting particles.…”

Section: Resultsmentioning

confidence: 64%

“…Some of the particles remove a chip as in metal cutting, while others leave material piled up at the sides of the crater. This uplifted material is presumably removed relatively easily by the impact of subsequent particles, as stated by other researchers [32,39]. As the impact at 60° proceeds, these piled up areas will eventually be detached and removed from the substrate, making this detachment the dominant mass loss mechanism.…”

Section: Eroded Surface Morphology: Figures 3 Andmentioning

confidence: 74%

“…Al 9 Co 2 ) is more susceptible to the action of the vertical component of the impact force, thus being mainly responsible for the lower erosion resistance of the Al-Co alloys at 90° impact angle as compared to the resistance at 60° impact angle. Moreover, the depth of damage accumulation is largest in the alloys subjected to erosion at 90°, where the impact energies are almost totally absorbed through straining of the subsurface material [32].…”

Section: Resultsmentioning

confidence: 99%

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Solid Particle Erosion of Aluminum In-Situ Reinforced with a Cobalt Aluminide

Lekatou¹

2017

Mater. Sci. Eng. Adv. Res

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The present effort studies the comparative solid particle erosion behaviour of Al-Co alloys of various compositions in the AlAl 9 Co 2 side of the Al-Co phase diagram. The alloys have been prepared by vacuum arc melting. The main concept behind the selection of the Al-Al 9 Co 2 region of the Al-Co phase diagram was the attainment of a two-phase structure (Al + Al 9 Co 2 ) that could combine the beneficial attributes of Al 9 Co 2 , as a Complex Metallic Alloy in-situ reinforcement, with the ductility/toughness of Al, as a matrix to the brittle intermetallic.Hypereutectic Al-Co alloys of various Co contents (7, 10, 15 and 20 wt.% Co), as well as monolithic commercially pure Al, were prepared by vacuum arc melting. The alloys were subjected to solid particle erosion testing at two impact angles (60° and 90°). The test results were interpreted based on weight change measurements and scanning electronic microscopy. It was revealed that the governing mechanisms change as the impact angle and the reinforcement volume fraction change. It was shown that factors affecting the brittle/ductile character of the material, such as Al 9 Co 2 volume fraction, Al 9 Co 2 coarseness, Co dissolved in Al, play a primary role on the erosion response of the alloys. The Al-Co alloys showed higher wear rates than Al. The wear rate increased with Co and, consequently, Al 9 Co 2 increasing. The surface characteristics and degradation mechanisms are being discussed.

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Section: Resultssupporting

confidence: 89%

Section: Resultsmentioning

confidence: 64%

Section: Eroded Surface Morphology: Figures 3 Andmentioning

confidence: 74%

Section: Resultsmentioning

confidence: 99%

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Solid Particle Erosion of Aluminum In-Situ Reinforced with a Cobalt Aluminide

Lekatou¹

2017

Mater. Sci. Eng. Adv. Res

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“…Among others jet type slurry device, this type of test rig is quite popular, it has been used by in Ref. [2,3,5,7,11,[40][41][42][43][44][45]. a) b) Fig.…”

Section: Jet Type Apparatusmentioning

confidence: 99%

Slurry Erosion – Design of Test Devices

Buszko

Krella

2017

Advances in Materials Science

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Degradation of material caused by impacts of a solid particle (erodent) suspended in a liquid is called slurry erosion and is a major problem in the hydropower and maritime industry. Slurry erosion depends on many factors, e.g. liquid and erodent velocity, size, shape, angle of impact, hardness and number of erodents, and strength of a target material. The various types of test devices have been designed to investigate an effect of mentioned parameters on material resistance. In the paper are described main types of the test apparatus showing their main advantages and disadvantages. Some results of slurry erosion resistance of few groups of materials are also presented.

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Erosive Wear Mechanism of New SiC/SiC Composites by Solid Particles

Suh

Hinoki

2010

Tribol Lett

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A solid-particle erosive wear test by impinging silicon carbide (SiC) powders was carried out at room temperature over a range of median particle sizes of 425-600 lm, speed of 100 m/s and impact angle of 90°a nd assessed by wear measurements and scanning electron microscopy. Erosive wear behaviour was examined on newly fabricated nano-powder infiltration and transient eutectoid (NITE) SiC/SiC composites and two commercial composites by the chemical vapour infiltration (CVI) and NITE fabrication route. Microstructural observation was performed to examine the correlation between erosive wear behaviours and fabrication impurities. Conspicuous defects were observed in the prototype materials as the forms of porosity, fibre deformation, residual oxide, pyrolytic carbon (PyC) deformation, PyC cleavage, among others. Erosive wear behaviour was rather serious in the prototype of fabricated composites, which employ pre-SiC fibre and phenolic resin. Two dominant erosive wear mechanisms were observed: delamination of constituents, mainly caused by erosive crack propagation, and fragmentation and detachment of constituents, which usually resulted from erosive impact. A unit size of delamination was the most decisive factor affecting wear volume. The bonding strength of each constituent was mostly affected by various forms of porosities. Therefore, the fundamental cause and subsequent results must be carefully elucidated. The correlation of microstructural defect and wear behaviour was investigated with the aim of reducing dominant wear by improving fabrication conditions. The final product of the cost-effective composite had a 2.5-fold higher resistance than the commercial CVI composite. Consequently, by controlling fabrication impurities, we have been successful in developing and improving a new fabrication technique; consequently, the known defects are rarely observed in final product. A schematic wear model of erosive wear mechanisms is proposed for the newly fabricated SiC/SiC composites under particle erosion.

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Erosive wear behaviour of aluminium based composites

Cited by 32 publications

References 16 publications

Solid Particle Erosion of Aluminum In-Situ Reinforced with a Cobalt Aluminide

Solid Particle Erosion of Aluminum In-Situ Reinforced with a Cobalt Aluminide

Slurry Erosion – Design of Test Devices

Erosive Wear Mechanism of New SiC/SiC Composites by Solid Particles

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