Adhesion of AA5182 aluminum sheet to DLC and TiN coatings at 25 °C and 420 °C

Riahi, A.R.; Alpas, A.T.

doi:10.1016/j.surfcoat.2007.07.085

Cited by 34 publications

(15 citation statements)

References 13 publications

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“…In the meanwhile, the selection of ball size and sliding distance is of great importance. In general, the contact pressure increases with decreasing ball size [29] and decreases with increasing sliding distance [30].…”

Section: Selection Of Friction Testing Techniques For the Friction Chmentioning

confidence: 95%

“…Equation (2) can be used to calculate the tangential and normal forces acting on the ball surface. shear friction stress at the initial stage may be due to the oxide layer on the disc and ball surfaces, which tends to lower the adhesion between aluminium and steel [29,30]. After the initial stage of sliding, the oxide layer may be broken up and metal-to-metal contact occurs, leading to the increases in friction stress.…”

Section: First Lap Of Wearmentioning

confidence: 99%

See 1 more Smart Citation

Identification of a friction model for the bearing channel of hot aluminium extrusion dies by using ball-on-disc tests

Wang

Zhou

Duszczyk

et al. 2012

Tribology International

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Section: Selection Of Friction Testing Techniques For the Friction Chmentioning

confidence: 95%

Section: First Lap Of Wearmentioning

confidence: 99%

Identification of a friction model for the bearing channel of hot aluminium extrusion dies by using ball-on-disc tests

Wang

Zhou

Duszczyk

et al. 2012

Tribology International

View full text Add to dashboard Cite

“…4). The low shear friction stress at the initial stage may be due to the oxide layer on the disc and ball surfaces, which tends to lower the adhesion between aluminium and steel [23,24]. After the initial stage of sliding, the oxide layer may be broken up and metal-to-metal contact occurs, leading to the increases in friction stress.…”

Section: Evolution Of Contact Area and Mean Contact Pressurementioning

confidence: 99%

“…During the extrusion of AA6063, an Al-Mg-O adhesive layer was observed in the die land area [13], which led to the sticking and chemical wear in the bearing channel of the extrusion die. In the more recent research, the adhesion between 5xxx series aluminium alloys and steel was investigated to simulate the material transfer between workpiece and tooling surface, and strong diffusion bonding was also observed [23,24]. The composition of the intermetallic compound layer at the aluminium (AA5083)-steel interface was identified as (Fe,Mn)Al 6 , Fe 4 Al 13 , Fe 2 Al 5 and Mg 2 Si [29].…”

Section: Influence Of Temperature On the Shear Friction Stressmentioning

confidence: 99%

Characteristics of the Friction Between Aluminium and Steel at Elevated Temperatures During Ball-on-Disc Tests

et al. 2009

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Appropriate specification of the frictional boundary condition for the finite-element (FE) simulation of metal-forming processes is of great importance to the trustworthiness of the results. The research reported in this communication aimed at understanding the interfacial contact between aluminium and steel at elevated temperatures and determining friction coefficients at this material mating. A series of high-temperature ball-on-disc tests were carried out with the AA7475 aluminium alloy as the material of disc and the hardened H11 steel as the material of ball. A mathematical model developed in the preceding research was employed to account for the evolution of the contact interface during ball-on-disc tests. Friction coefficients at different temperatures and over a number of laps were determined. The shear friction stresses and mean contact pressures along with the progress of the tests at 350-500°C were calculated. It was found that the friction coefficients obtained from ball-on-disc tests alone were insufficient to represent the frictional interaction between deforming aluminium and steel at elevated temperatures. The evolution of the contact interface with increasing sliding distance must be taken into consideration and the friction behaviour can be reasonably characterized by using friction stress.

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“…With regard to reducing the friction coefficient at the tool/workpiece interface, the use of lubricants can enhance the ability to produce a good quality component [11]. To increase the effect of a lubricant treatment, a variety of surface engineering methods, such as diamond-like coatings (DLC) [12][13][14] and micro-scale texturing, have been applied to tool surfaces [15,16]. The DLCs act as solid lubricants and simultaneously increase wear resistance and reduce friction [12].…”

Section: Introductionmentioning

confidence: 99%

An experimental and numerical investigation of the effect of macro-textured tool surfaces in hot stamping

et al. 2015

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This paper presents a method of increasing drawability of materials in hot stamping processes using forming tools with macro-scale textures on the tool surfaces. Firstly, a series of tool texture designs and orientations were presented and a test programme was designed for the experimental investigation. Top-hat shape drawing experiments in cold and hot stamping conditions were conducted to evaluate the effect of macro-scale tool surface textures on the material drawing. Texture directional and texture feature effects of the blankholders on the draw-ability of the material have been investigated. A finite element model of the top-hat drawing process with textured tool surfaces has been established and validated from experimental data. Further FE process modelling has been carried out and the effects of texture features and forming speed have been studied. The relationships between texture designs and material drawing results have been analysed. The developed FE model can provide a guide to design the geometry of tool textures and optimise the hot stamping process parameters.

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Adhesion of AA5182 aluminum sheet to DLC and TiN coatings at 25 °C and 420 °C

Cited by 34 publications

References 13 publications

Identification of a friction model for the bearing channel of hot aluminium extrusion dies by using ball-on-disc tests

Identification of a friction model for the bearing channel of hot aluminium extrusion dies by using ball-on-disc tests

Characteristics of the Friction Between Aluminium and Steel at Elevated Temperatures During Ball-on-Disc Tests

An experimental and numerical investigation of the effect of macro-textured tool surfaces in hot stamping

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