Pulsed laser remelting of A384 aluminum, part I: Measuring homogeneity and wear resistance

Chen, Shixuan; Richter, Brodan; Morrow, Justin D.; Sridharan, Kumar; Pfefferkorn, Frank E.; Eriten, Melih

doi:10.1016/j.jmapro.2018.03.004

Cited by 18 publications

(11 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As Si has higher melting point (1414 °C) than that of Al (660 °C), the Al phases melted before the Si during LP. Chen et al [24] also reported redistribution of Si-rich phases within the laser processed area. Furthermore, the incorporation of the insulating ceramic plate reduced the parts' cooling rates that led to the reduction of Si solubility in the liquid [35], thus increased the solute concentration.…”

Section: Assessment Of Microhardness and Microstructurementioning

confidence: 93%

“…Conversely, it was possible to polish the cast Al alloy that exhibited 66% reduction in Ra, from an initial roughness of 1.37 µm to 0.47 µm after LP. Furthermore, laser polished Al parts showed higher hardness and better wear resistance in comparison to the parent material, due to more uniform redistribution of smaller Si-rich phases within the laser processed areas [24]. Elahi et al [27] observed development of an artificial oxide layer when LP of Al surfaces in atmospheric condition that led to an improvement in the wettability of the surfaces, thereby improved the weldability of the material when joined with a dissimilar material (polyamide in this case).…”

Section: Introductionmentioning

confidence: 99%

“…Possibly because of this reason LP of the latter two materials have been more comprehensively studied [15][16][17][18][19][20]. In contrast, very limited research has been undertaken on the LP of Al alloys, where the materials were mainly forged and die cast [23,24]. Research on the LP of SLM Al parts [25] is even more inadequate.…”

Section: Introductionmentioning

confidence: 99%

“…The majority of literature on the LP of Al alloys has focussed on the evaluation of surface topography and roughness [23,[25][26][27], only a few papers has reported the effects of LP on the wear [24] and corrosion [28] resistance. Schmidt et al [26] reported pulsed Nd-YAG laser polishing of forged AlCu4MgPb alloy and cast AlSi10Mg(Fe) alloy, with varying laser feed speed, hatch spacing and energy density (by changing the defocusing distance of the laser beam).…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Pulsed laser polishing of selective laser melted aluminium alloy parts

Bhaduri

Ghara

Penchev

et al. 2021

Applied Surface Science

View full text Add to dashboard Cite

Section: Assessment Of Microhardness and Microstructurementioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Pulsed laser polishing of selective laser melted aluminium alloy parts

Bhaduri

Ghara

Penchev

et al. 2021

Applied Surface Science

View full text Add to dashboard Cite

“…Apart from these examples, laser remelting process has been applied to many different types of alloys and coatings and the effect of this process on mechanical properties as well as on properties such as wear and corrosion resistance has been investigated. [20][21][22][23][24][25] Laser remelting process can overcome the shortcomings as a promising method compared to many surface modification methods. With laser remelting, it is possible to obtain layers of adjustable thickness from a few micrometers to a few millimeters, with good metallurgical bonding.…”

Section: Introductionmentioning

confidence: 99%

Laser Remelting Power Effect on Microstructure, Hardness and Wear Behavior of AISI 1020

Erdoğan

2022

Proceedings of the Institution of Mechanical Engineers, Part C:

View full text Add to dashboard Cite

In this study, the effect of laser remelting on the microstructure, hardness, and wear properties of AISI 1020 steel was investigated. In this context, laser remelting process was carried out at different laser powers. The surface of steel was subjected to laser remelting process at 1, 1.3, and 1.8 kW powers. Thanks to the applied laser remelting surface modification, martensitic transformation was obtained in the pearlite+ferrite structure. Depending on the applied laser power, the transformation depth increased. The martensitic transformation was determined at a depth of 70 µm at the lowest laser power and 250 µm at the highest laser power. An increase up to 552 HV was achieved after the remelting process on the surface of AISI 1020 steel. Depending on the increasing laser power, the highest surface hardness values decreased. However, the hardness values obtained with increasing laser power were preserved at longer distances towards the center. In ball-on-disc tribology tests, laser remelting has been shown to reduce wear losses by up to 52%. The highest wear resistance was determined in the sample whose surface was modified with the lowest laser power. Laser remelted samples showed lower friction coefficient due to hardness and oxidation on their surfaces.

show abstract

Tribological Behavior of Cathode Plasma Electrolytic Deposited Al2Y4O9 Coating on Aluminum Alloy

et al. 2022

View full text Add to dashboard Cite

Ceramic coatings are widely used as protective barriers on the surfaces of various metals and alloys.Herein, a novel surface ceramic treatment, i.e., cathode plasma electrolytic deposition (CPED), is proposed for the surface of an Aluminum (Al) alloy. The coating, prepared in an Y(NO 3 ) 3 aqueous solution on the surface of the Al alloy, consists of Al 2 Y 4 O 9 as the major phase component, Y 2 O 3 as a minor phase component, and amorphous Al 2 O 3 in the grain boundaries. As the applied voltage and deposition time increased, the crystallization of the coatings was enhanced. When deposited at 130 V for 10 min, the contact angle of the ceramic coating reached 141.0 ± 2.6°, indicating an enhanced self-cleaning effect.The ceramic coating also exhibited excellent self-lubricating and anti-wear effects. The friction coe cient of the CPED-treated sample vs. ZrO 2 ball or bearing steel ball decreased from 0.55-0.65 to 0.26-0.31 when the load was 3 N and the reciprocating velocity was 10 mm/s. Correspondingly, the wear rate of the CPED-treated sample vs. the ZrO 2 ball or bearing steel ball was signi cantly reduced. Results indicated that CPED is effective for the formation of self-cleaning and anti-wear ceramic coatings on Al alloys.

show abstract

Pulsed laser remelting of A384 aluminum, part I: Measuring homogeneity and wear resistance

Cited by 18 publications

References 35 publications

Pulsed laser polishing of selective laser melted aluminium alloy parts

Pulsed laser polishing of selective laser melted aluminium alloy parts

Laser Remelting Power Effect on Microstructure, Hardness and Wear Behavior of AISI 1020

Tribological Behavior of Cathode Plasma Electrolytic Deposited Al2Y4O9 Coating on Aluminum Alloy

Contact Info

Product

Resources

About