Rotation-assisted Abrasive Fluidised Bed Machining of AlSi10Mg parts made through Selective Laser Melting Technology

Hassanin, Andrea El; Troiano, Maurizio; Scherillo, Fabio; Silvestri, Alessia Teresa; Contaldi, Vincenzo; Solimene, Roberto; Scala, Fabrizio; Squillace, Antonino; Salatino, Piero

doi:10.1016/j.promfg.2020.04.113

Cited by 35 publications

(4 citation statements)

References 11 publications

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“…Moreover, other technologies typically used in other contexts were subjected to a feasibility study in the surface finishing context, given their higher capability of access into complex parts features in comparison with the previously mentioned techniques. Examples of these processes are the Fluidized Bed and Hydrodynamic cavitation technologies [16][17][18][19]. However, in general, mechanical based surface treatments present strong limitations related to the physical access of tools and abrasive media into complex parts shapes such as the ones achievable with AM.…”

Section: Post-process Surface Finishing Techniques For Metal Additive...mentioning

confidence: 99%

CO2 laser polishing of laser-powder bed fusion produced AlSi10Mg parts

Hassanin

Obeidi

Scherillo

et al. 2021

Surface and Coatings Technology

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Section: Post-process Surface Finishing Techniques For Metal Additive...mentioning

confidence: 99%

CO2 laser polishing of laser-powder bed fusion produced AlSi10Mg parts

Hassanin

Obeidi

Scherillo

et al. 2021

Surface and Coatings Technology

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“…When inspecting ball screw and ball nut assembly of flaps jackscrew actuator after 10,000 flight hours of operation, we identified fretting corrosion damage in the form of discoloration, ball-caused brinelling, metal chipping [32][33][34][35][36].…”

Section: Analysis Of Damage To the Parts Of A Ball-screw Mechanismmentioning

confidence: 99%

Improving the wear resistance of heavy-duty elements in tribomechanical systems by a combined laser-thermochemical processing method

Киндрачук

Духота

Тіsov

et al. 2021

EEJET

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This paper reports an analysis of the state of tribological support in the aviation industry. The use of surface strengthening technologies to extend the resource of friction node parts has been prioritized. Modern combined technologies of nitriding and laser treatment of steel surfaces have been reviewed. The mechanism has been elucidated that damages steel 30H2NVFA in the jackscrew actuator of transport aircraft flaps, which occurs due to insufficient surface hardness of the material after a generally accepted heat treatment. Auger electron spectroscopy analysis revealed a high concentration of oxygen on the surface: up to 41.4 at. %; the friction surface carbonation has been detected, especially significant at the surface of the pitting damage. A comprehensive technology of surface strengthening by nitriding+laser selective hardening has been suggested. The radiation power was 1 KW, the diameter of the focus spot was 2.5 mm, and the pitch between the focus spot centers was 2.5 mm. The total area of laser processing was 70 %. The steel temperature exceeded Ас3 and corresponded to the hardening temperature range. The depth of the nitrided layer increased to 400 µm, the maximum hardness on the surface was 1,350–1,380 HV0.2. The formation of a solid nitrided layer with a thickness of 200‒250 µm was observed, as well as a transition zone composed of column-shaped iron nitrides, which are introduced into the matrix material. As a result, a sharp gradient in the mechanical properties disappears. The tests confirmed that the wear resistance of the comprehensively treated surface was 2.1 times higher under dry friction conditions, and 4.5 times higher when lubricated with the "Era" grease (RF), compared with the 30H2NVFA steel nitrided by the conventional technology. In addition, there was no fragile destruction of the surface; the interaction with oxygen reduced significantly

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“…Industry and designers are constantly requesting lighter, more resistant, better adaptable materials to reduce fuel consumption in automotive and aerospace sectors, to better combine dissimilar materials, to enhance the surface properties or to produce lighter structures [1][2][3][4][5][6][7][8][9][10]. This necessity is met in many cases by using advanced composite materials [11][12][13][14][15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Calibration of the Elasto-Plastic Properties of Friction Stir Welded Blanks in Aluminum Alloy AA6082

Tucci

Andrade‐Campos

Thuillier

et al. 2022

KEM

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In recent years remarkable efforts have been devoted to the study of the formability of tailored blanks processed by friction stir welding (FSW) by means of numerical and experimental approaches. This study aims to perform an inverse analysis to calibrate the constitutive law of FSW blanks produced with different parameters. The evaluated mechanical behavior will be employed in future studies to investigate the formability of such elements by single point incremental forming. This study analyzes friction stir welded blanks in aluminum alloy AA6082-T6 produced with different advancing velocities and tool rotational speeds. Coupons for tensile testing have been cut and collected from the FSW blanks. The longitudinal dimension of the coupons was perpendicular to the tool advancing direction, with the welding centerline located at the middle point of the coupon. From the same welded blanks further coupons have been collected to conduct microhardness testing of the cross-section in the welding zone. Data from digital image correlation (DIC) have been adopted to detect the zones of local variation of the mechanical properties related to the peculiar microstructure determined by friction stir welding. In particular, the data were used as input to feed an iterative numerical routine to calibrate the constitutive law variable as a function of the distance from the welding centerline.

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Rotation-assisted Abrasive Fluidised Bed Machining of AlSi10Mg parts made through Selective Laser Melting Technology

Cited by 35 publications

References 11 publications

CO2 laser polishing of laser-powder bed fusion produced AlSi10Mg parts

CO2 laser polishing of laser-powder bed fusion produced AlSi10Mg parts

Improving the wear resistance of heavy-duty elements in tribomechanical systems by a combined laser-thermochemical processing method

Calibration of the Elasto-Plastic Properties of Friction Stir Welded Blanks in Aluminum Alloy AA6082

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