Tribological Properties of Aluminum Alloy treated by Fine Particle Peening/DLC Hybrid Surface Modification

Amano, Yuki; Nanbu, Hiroshi; Kameyama, Yutaka; Komotori, Jun

doi:10.1051/epjconf/20100626011

Cited by 2 publications

(1 citation statement)

References 14 publications

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“…The favourable effect of SP treatment of structural elements exposed to the corrosive environment was determined by [12][13][14], although roughened surfaces after SP have a higher specific surface and thus it increases corrosion potential [15]. There are studies on severe shot peening [16], fine particle shot peening [17,18], comparing conventional SP with another surface treatments [2,15,[19][20][21]35] and multiple re-shot peening [22].…”

Section: Introductionmentioning

confidence: 99%

Archives of Metallurgy and Materials

Byczkowska

Sawicki

Januszewicz

et al. 2018

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Conventional shot peening (SP) is cheap surface treatment widely used to enhance fatigue life of mechanical components [3,4]. Basically, it is shooting small particles (shots) on the surface of the sample. However, the process itself is so complex that a lot of companies are not able to optimally employ it due to the amount of parameters that must be controlled all at the same time.The duplex process consists in two stages of shot-peening treatment. The first one consist of shot-peening with spherical cast steel shots or cut wire shots. During the second stage the samples processed in stage one were subject to shot-peening with glass beads.In this work, RSA-501 aluminium alloy was shot peened using shots of different material and diameter and tested using a measurement of residual stresses and surface roughness. Tests and studies conducted so far on RSA-501 aluminium alloy demonstrate that bombardment by a treatment medium in the form of glass beads or shots of various shapes and diameters induces permanent plastic deformation of the surface layer. The roughness achieved after the shot-peening process was determined for each treatment medium. The largest value of Ra parameter was achieved for cut wire shots and this result is consistent with the above-mentioned theoretical knowledge. This medium is the most aggressive one to the surface being treated primarily due to the sharp edges of shots. The duplex process was successful in obtaining higher values of compressive stresses in surface layer than values achievable in conventional single-stage shot peening process.

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Section: Introductionmentioning

confidence: 99%

Archives of Metallurgy and Materials

Byczkowska

Sawicki

Januszewicz

et al. 2018

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Applicability of Interrupted Micro Cutting Process “Tilling” as Surface Texturing

Usami

Sato

Kanda

et al. 2017

KEM

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Tribological properties of textured surfaces fabricated using a discontinuous microcutting process were investigated. Aluminum cast alloy (AC8A) discs were used for the specimens. The texturing process was carried out using a CNC machining center with a cutting edge with a novel geometry. The resulting surface morphology consisted of micro dimples with a diameter of 200-300 μm and a depth of 5-10 μm, with controlled area fractions of 10 and 40% and a top region finished with a milling cut. The tribological properties were evaluated using a ring-on-disc type testing apparatus under lubricated conditions, and showed that the friction coefficient of the textured surfaces was low and stable from the beginning of the experiment. A dependence of the friction coefficient on the area fraction was also found. Further reductions in the friction coefficient were achieved on a textured surface with a polished top region. It can be concluded that the proposed discontinuous micro cutting process is an effective means of fabricating a micro texture for the reduction and stabilization of frictional resistance.

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Tribological Properties of Aluminum Alloy treated by Fine Particle Peening/DLC Hybrid Surface Modification

Cited by 2 publications

References 14 publications

Archives of Metallurgy and Materials

Archives of Metallurgy and Materials

Applicability of Interrupted Micro Cutting Process “Tilling” as Surface Texturing

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