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Research Papers: Friction and Wear

The Effects of Constant Kinetic Energy of Different Impacting Particles on Slurry Erosion Wear of AA 6063

[+] Author and Article Information
Bhushan D. Nandre

CSIR-National Chemical Laboratory,
Dr. Homi Bhabha Road,
Pune 411008, Maharashtra, India;
M.E.S. College of Engineering, Pune,
S. P. Pune University,
Pune 411001, Maharashtra, India
e-mail: bhushan.nandre@gmail.com

Girish R. Desale

CSIR-National Chemical Laboratory,
Dr. Homi Bhabha Road,
Pune 411008, Maharashtra, India
e-mail: gr.desale@ncl.res.in

1Corresponding author.

Contributed by the Tribology Division of ASME for publication in the JOURNAL OF TRIBOLOGY. Manuscript received March 11, 2017; final manuscript received October 13, 2017; published online December 6, 2017. Assoc. Editor: Nuria Espallargas.

J. Tribol 140(3), 031605 (Dec 06, 2017) (8 pages) Paper No: TRIB-17-1080; doi: 10.1115/1.4038355 History: Received March 11, 2017; Revised October 13, 2017

The present experimental study investigates the effect of constant kinetic energy on erosion wear of aluminum alloy 6063. Three different natural erodents (quartz, silicon carbide, and alumina) with different particle sizes are used to impact at 45 deg and 90 deg impact angles. For calculating the number of particles in the slurry pot, it is assumed that the solid particles are of spherical shape. The total numbers of impacting solid particles were kept constant by adjusting the solid concentration, velocity, and test duration. The scanning electron microscope (SEM) images of the three erodents show that the alumina particles have sharp edges with more angularity, and silicon carbide particles have subangular nature while quartz particles are blocky in shape. The mass loss per particle at 45 deg impact angle is observed higher than at normal impact angle. It may be due to the change in material removal mechanism with changing the impact angle. It is also found that the mass loss per particle from the target material having different particle size with constant kinetic energy remains constant for respective erodents. This indicates that the velocity exponent of impacting particles is around 2. The SEM images of eroded surfaces reveal the different mechanisms of material removal at 45 deg impact angle and at normal impact angle.

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Figures

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Fig. 1

Schematic diagram of experimental setup: (a) slurry pot test rig, (b) slurry pot, (c) test fixture with test specimen, (d) indexing plate, and (e) fixing arrangement for test fixture

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Fig. 2

SEM images of natural erodents (particle size 362.5 μm): (a) quartz, (b) silicon carbide, and (c) alumina

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Fig. 3

Solid particles striking at 90 deg and 45 deg impact angles

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Fig. 4

Variation in velocity and solid concentration of impacting particles for constant kinetic energy

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Fig. 5

Mass loss per particle at 45 deg and 90 deg orientation angles with different particle size

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Fig. 6

Variation in contact area due to impact of spherical and angular erodents [7]

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Fig. 7

Mechanism of material removal with different erodents at constant kinetic energy (target material: AA6063; and erodent size 362.5 μm): (a) quartz at 45 deg impact angle, (b) SiC at 45 deg impact angle, (c) alumina at 45 deg impact angle, (d) quartz at 90 deg impact angle, (e) SiC at 90 deg impact angle, and (f) alumina at 90 deg impact angle

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Fig. 8

Mechanism of material removal using different size quartz particles with constant kinetic energy at 45 deg impact angle (target material: AA6063): (a) quartz 550 μm, (b) quartz 462.5 μm, and (c) quartz 256 μm

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