Wear mechanism maps for metal matrix composites

Wilson, Scott; Alpas, A.T.

doi:10.1016/s0043-1648(97)00142-7

Cited by 236 publications

(72 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…These oxide thin films were more in the case of SiCp reinforced composites than the base alloy. The benefits of SiCp reinforcement were evident in lower wear loss of the nanocomposites when oxidation was present [33,34]. The change in wear loss was low, up to 15 N loads and it was high above 20 N normal loads on pin material.…”

Section: Effect Of Normal Load On Wear Lossmentioning

confidence: 97%

Dry sliding wear behaviour of ultrasonically-processed AA6061/SiCp nanocomposites

Reddy¹,

Krishna²,

Rao³

2017

Int. J. Automot. Mech. Eng.

View full text Add to dashboard Cite

The present study focused on the wear performance of AA6061/ SiCp (1, 1.5 and 2 wt. %) of nanocomposites at dry sliding condition. The nanocomposite specimens were fabricated through ultrasonic assisted stir casting technique. The wear experiments were conducted under normal atmospheric conditions using a pin-on-disc apparatus. Three different applied normal loads on nanocomposite pin (10 N, 15 N, and 20 N); at various sliding velocities of (1 m/s, 1.5 m/s, and 2 m/s); and at sliding distances of (1000 m, 2000 m, and 3000 m) were considered. The influences of applied normal load on nanocomposite pin, wt. % of SiCp reinforcement particles, sliding velocity, and sliding distance on both friction coefficient and wear loss were studied. The changes of wear loss and friction coefficient with varying applied normal loads, sliding velocities, and sliding distances were plotted. It was observed that the wear loss increased linearly with increasing sliding distance and sliding velocity. This was due to the increase of oxidation layer on the pin surface. The average friction coefficient at sliding velocity 1 m/s for 1 wt. % of SiCp, 1.5 wt. % of SiCp, and 2 wt. % of SiCp reinforced nanocomposites at sliding distance 3000 m, at 20 N normal loads was 0.29, 0.43, and 0.46, respectively. The average friction coefficient at 2 m/s sliding velocity for the same load and sliding distance was 0.26, 0.27, and 0.28, respectively. The increase of SiCp reinforcement in the matrix increased the friction coefficient due to its cubic crystal structure. The increase of sliding velocity and sliding distances reduced the friction coefficient. The worn surfaces of the samples were examined using SEM and EDX analyses. SEM micrograph analysis of the wear surfaces of the nanocomposites exhibited the abrasion wear and oxidative wear with severe plastic deformation. The shallower scratches, circular grooves, and deeper grooves were identified at different conditions on the worn surfaces.

show abstract

Section: Effect Of Normal Load On Wear Lossmentioning

confidence: 97%

Dry sliding wear behaviour of ultrasonically-processed AA6061/SiCp nanocomposites

Reddy¹,

Krishna²,

Rao³

2017

Int. J. Automot. Mech. Eng.

View full text Add to dashboard Cite

show abstract

“…The friction coefficient between two surfaces, according to friction theories, is an intrinsic constant of material, but this is confirmed only for a particular speed line, contact pressure, lubrication state, etc. [6,7,8]. The analysis of the tribological behavior of these coupling materials (composite/iron cast materials) follows the evolution of friction coefficient, depending on different loading parameters (pressure, sleeding speed).…”

Section: The Phenomenological Analysis Of the Nature Of The Frictionmentioning

confidence: 99%

The Phenomenological Analysis of the Nature of the Friction, From Theoretical and Experimental Point of View of Al-Al2o3-Graphite Composite /Cast Iron „pin on Disc” Sliding System

2017

IJOMAM

View full text Add to dashboard Cite

-The theoretical and experimental researches on developing of friction coupling materials that are part of the disc-pad braking systems of vehicle and analysis the tribological behavior of them, has been in the spotlight of the specialists in this field in the past decades. Explaining the phenomena that occur at the level of friction surfaces in relative motion have become increasingly complex and often contradictory. Consequently, in this paper was studied the dry sliding wear behavior and friction coefficient evolution of Al-Al2O3-Graphite composite /cast iron system. The proposed theoretical model analyze how the friction coefficient is influenced by different factors as: (a) the adhesion coefficient, (b) the deformation of the material during friction and (c) the inclination angle of the microasperity resulting from the friction process for metal-metal or metal-ceramic coupling in general and aluminum based composite / cast iron couple in particular. For the experimental part we used AlZn6MgCu as aluminium matrix (in cast and age hardening state) reinforced with different proportion of graphite and/ or Al2O3 ceramic particles.The composite samples are tribological tested on cast iron disc (300HB hardness) at room temperature using a pin on disc machine, at contact pressure of 3.5 and 7.5 x 10 -1 MPa and sleeding speed of 3.8 m/s under dry sliding conditions.

show abstract

“…Wilson and Alpas (1997) [21] constructed empirical wear transition maps to delineate the load velocity conditions under which wear transitions occurred in an A356 AI alloy and an A356 Al20%SiC composite. They performed experiments in dry sliding conditions, using a block-on-ring (SAE 52100) configuration, within a load range of 0.2-400 N and a sliding velocity range of 0.2-5.0 m s −1 .…”

Section: Brief Overview Of Literaturementioning

confidence: 99%

Wear Modeling and Wear Mapping: A Review

2017

IJMTER

View full text Add to dashboard Cite

Abstract-Researches on the wear of metals have brought new understanding and advanced major concepts of tribology. The availability of new testing methods and instruments have made possible the detailed study of the microstructure, nanostructure, and compositions of contact surfaces. Earlier work was concentrated on the mechanics of solid contact, understanding the true area of contact, asperity plasticity, and transfer during sliding. The scanning electron microscope and the atomic force microscope have provided fascinating insights and detailed information on surface structure. There have also been developments in computational modelling of wear by finite element methods, molecular dynamics, and fracture mechanics. Many wear models and equations in the literature have been developed. No single predictive equation or group of limited equations have been found for general and practical use. Various regimes of mechanical and corrosive wear for any particular pair of rubbing materials can be shown on a single wear map plotted on axes of normalised pressure and sliding velocity. In principle the map can be divided into areas corresponding to different wear regimes, with boundaries of sliding speed and contact pressure beyond which a purely mechanical view of wear would be grossly in error, owing to the effects of oxidation.

show abstract

Wear mechanism maps for metal matrix composites

Cited by 236 publications

References 12 publications

Dry sliding wear behaviour of ultrasonically-processed AA6061/SiCp nanocomposites

Dry sliding wear behaviour of ultrasonically-processed AA6061/SiCp nanocomposites

The Phenomenological Analysis of the Nature of the Friction, From Theoretical and Experimental Point of View of Al-Al2o3-Graphite Composite /Cast Iron „pin on Disc” Sliding System

Wear Modeling and Wear Mapping: A Review

Contact Info

Product

Resources

About