Performance of low-friction coatings in the dry drilling of automotive Al–Si alloys

Wain, N.; N.R.Thomas,; Hickman, Stephen H.; Wallbank, J.; Teer, D.G.

doi:10.1016/j.surfcoat.2005.08.016

Cited by 40 publications

(18 citation statements)

References 8 publications

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“…114 Tool damage is caused mainly by the formation of an adhesion layer and a built-up-edge (BUE) entailing a reduction in tool life. 115 Thus, cutting fluids play an important role in the machining process since they contribute to: (i) the reduction of friction in tool-workpiece contact; (ii) the removal of chips from the tool rake face; (iii) the drop in temperature in the contact zone; and (iv) the limitation of the diffusion of chemical species from the tool towards the chip and vice versa. 116 The use of cutting fluids, however, seriously degrades the quality of the environment and increases the costs of machining, thus lubrication represents about 16-20% of the product cost.…”

Section: Dry Drilling Of Aluminum Alloysmentioning

confidence: 99%

Machinability aspects of heat-treated Al-(6-11)%Si cast alloys :

Zedan¹

2010

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Section: Dry Drilling Of Aluminum Alloysmentioning

confidence: 99%

Machinability aspects of heat-treated Al-(6-11)%Si cast alloys :

Zedan¹

2010

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“…The microstructure (presented in Figure 2) consisted of both Al-rich α-phase and intermetallic eutectic phase. According to Teer and co-workers (Teer et al, 2005) …”

Section: Methodsmentioning

confidence: 99%

Influence of Hydraulic and Interference-fit Tool Holders on Tool Wear and Hole Quality in the Drilling of Al-Si Cylinder Heads

Martins

Carneiro

Brito

et al. 2012

MER

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The present work compares the performance hydraulic and interference-fit tool holders in the machining of Al-Si cylinder head components produced by pressure casting for the automotive industry by analyzing tool wear as well as geometry, roughness and tolerance of the produced holes. Uncoated WC + Co cutting tools were applied and the drilling operations were carried out at a Hüller computer numerical controlled machining center. Tool wear was characterized by applying optical and scanning electron microscopy and geometry of the holes was followed for parts 1 to 11500. The investigations revealed that, while no significant difference in tool wear could be detected, better results with respect to hole diameter, roundness and surface roughness were obtained for the drills fixed by thermal interference.

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“…Graphit-iC ® coating showed exceptional results; the coating improved the tool life by 400% and reduced adhesion, thus reducing the number of undersized holes during machining applications. 8 In another application, in order to prevent potential damage to contacting components caused by fretting, low friction coatings were used. Thermally sprayed dry film lubrication (DFL) coatings and solid coatings deposited by a mechano-chemical process were characterized by performance properties like the coefficient of friction (COF) and the remnant relative thickness.…”

Section: As Lubricants In Applicationsmentioning

confidence: 99%

Surface characterization of novel alumina-based composites for energy efficient sliding systems

Paluri

Ingole

2011

JOM

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How would you……describe the overall signifi cance of this paper?The overall signifi cance of this paper is to increase the energy effi ciency, sustainability and applicability of sliding systems by improving the surface properties. This article focuses on development of selflubricating materials with superior surface properties for reduced friction and wear applications.…describe this work to a materials science and engineering professional with no experience in your technical specialty? This article mainly focuses on developing a novel alumina based composite which improves the energy effi ciency of a sliding system. The surface properties of the composites were improved by in-situ forming inter-metallic compounds. These phases are stable at higher temperatures. These in-situ phases have hexagonal crystal structure that contributes to low friction due to lower shear in the basal plane. …describe this work to a layperson? Friction plays an important role in daily life such as walking, skiing, writing, vehicles travelling on roads, other applications such as automobile engines, biomedicine, etc. which involve moving parts. It directly infl uences the performance and service life of a system. Development of a new class of materials with superior surface properties will improve the energy effi ciency and endurance which will result in low maintenance costs and prolonged service life. Friction, wear, and lubrication have direct infl uence on performance, reliability, and service life of devices that contain moving components. These are universal in applications of energy conversion, power generation, energy harvesting in the broader fi elds such as agriculture, transportation, drug delivery, and bioengineering. The useful life of these systems and their energy efficiency can be improved by improving the surface properties (performances) of sliding systems. Further, the applications of sliding systems are limited in extreme environments such as high temperature and space application etc. due to their limited surface properties. Therefore, development of a new class of materials with superior surface properties will improve the energy effi ciency, sustainability, and applicability. This paper focuses on development of self-lubricating materials with superior surface properties for reduced friction and wear applications.

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Performance of low-friction coatings in the dry drilling of automotive Al–Si alloys

Cited by 40 publications

References 8 publications

Machinability aspects of heat-treated Al-(6-11)%Si cast alloys :

Machinability aspects of heat-treated Al-(6-11)%Si cast alloys :

Influence of Hydraulic and Interference-fit Tool Holders on Tool Wear and Hole Quality in the Drilling of Al-Si Cylinder Heads

Surface characterization of novel alumina-based composites for energy efficient sliding systems

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