Tribological properties of selective laser melted Al 12Si alloy

Rathod, Hemant J.; Nagaraju, T. Vamsi; Prashanth, Konda Gokuldoss; Ramamurty, Upadrasta

doi:10.1016/j.triboint.2019.04.038

Cited by 58 publications

(31 citation statements)

References 50 publications

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“…The low melting point of this alloy provides good castability due to its low density and good wear properties, AlSi 12 is quite attractive for applications in automotive and aerospace industries. It can be used for cryogenic applications as it can retain its strength at low temperatures such as at high altitudes [ 106 ]. The mechanical properties of SLM-printed AlSi 12 are summarized in Table 5 .…”

Section: Mechanical Properties Of Slm-printed Aluminium Alloysmentioning

confidence: 99%

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Mechanical Properties of SLM-Printed Aluminium Alloys: A Review

et al. 2020

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Selective laser melting (SLM) is a powder bed fusion type metal additive manufacturing process which is being applied to manufacture highly customised and value-added parts in biomedical, defence, aerospace, and automotive industries. Aluminium alloy is one of the widely used metals in manufacturing parts in SLM in these sectors due to its light weight, high strength, and corrosion resistance properties. Parts used in such applications can be subjected to severe dynamic loadings and high temperature conditions in service. It is important to understand the mechanical response of such products produced by SLM under different loading and operating conditions. This paper presents a comprehensive review of the latest research carried out in understanding the mechanical properties of aluminium alloys processed by SLM under static, dynamic, different build orientations, and heat treatment conditions with the aim of identifying research gaps and future research directions.

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Section: Mechanical Properties Of Slm-printed Aluminium Alloysmentioning

confidence: 99%

“…Rathod et al [ 106 ] investigated the effect of scanning strategy and heat treatment on the tribological properties of the SLM AlSi 12 parts and compared with cast alloy. The process of annealing lead to Si precipitation resulting in the reduction of hardness.…”

Section: Mechanical Properties Of Slm-printed Aluminium Alloysmentioning

confidence: 99%

Mechanical Properties of SLM-Printed Aluminium Alloys: A Review

et al. 2020

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“…In this context, the literature mainly investigated parts that were manufactured by laser powder bed fusion (L-PBF), also referred to as selective laser melting (SLM) [8][9][10][11][12][13]. Using this method, Al-Si and Ti6Al4V alloys, and 316L steel were printed and tested with or without further changes to the surfaces themselves [8][9][10][11][12][13]. Moreover, hybrid additive manufacturing methods consisting of laser cladding, milling, ultrasonic surface rolling [14], and different coating systems [15,16] were used to improve the tribological performance of additively manufactured materials.…”

Section: Introductionmentioning

confidence: 99%

Tribological Performance of Additively Manufactured AISI H13 Steel in Different Surface Conditions

et al. 2021

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Additive manufacturing of metallic tribological components offers unprecedented degrees of freedom, but the surface roughness of most as-printed surfaces impedes the direct applicability of such structures, and postprocessing is necessary. Here, the tribological performance of AISI H13 steel samples was studied. These were additively manufactured through laser powder bed fusion (L-PBF), also referred to as selective laser melting (SLM). Samples were tested in four different surface conditions: as-printed, polished, ground and polished, and laser-surface-textured (LST) with round dimples. Friction experiments were conducted in a pin-on-disk fashion against bearing steel disks under lubrication with an additive-free mineral base oil for sliding speeds between 20 and 170 mm/s. Results demonstrated that, among the four surface treatments, grinding and polishing resulted in the lowest friction coefficient, followed by the as-printed state, while both polishing alone and laser-surface texturing increased the friction coefficient. Surprisingly, direct correlation between surface roughness and friction coefficient, i.e., the rougher the surface was, the higher the friction force, was not observed. Wear was minimal in all cases and below what could be detected by gravimetrical means. These results highlight the need for an adequate post-processing treatment of additively manufactured parts that are to be employed in tribological systems.

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“…In addition, Wang et al have showed successful fabrication of Al-Cu material and Zhao et al have showed the successful fabrication of Cu-Ni-Sn samples from elemental powders using SLM [ 42 , 43 ]. These reports show that not only elemental powders may be used for fabricating parts by SLM but also the parts with a refined microstructure may be obtained due to high cooling rates observed during the SLM process [ 44 , 45 , 46 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Substrate Plate Heating on the Microstructure and Properties of Selective Laser Melted Al-20Si-5Fe-3Cu-1Mg Alloy

Jia

et al. 2021

Materials

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The Al-20Si-5Fe-3Cu-1Mg alloy was fabricated using selective laser melting (SLM). The microstructure and properties of the as-prepared SLM, post-treated SLM, and SLM with substrate plate heating are studied. The as-prepared SLM sample shows a non-uniform microstructure with four different phases: fcc-αAl, eutectic Al-Si, Al2MgSi, and δ-Al4FeSi2. With thermal treatment, the phases become coarser and the δ-Al4FeSi2 phase transforms partially to β-Al5FeSi. The sample produced with SLM substrate plate heating shows a relatively uniform microstructure without a distinct difference between hatch overlaps and track cores. Room temperature compression test results show that an as-prepared SLM sample reaches a maximum strength (862 MPa) compared to the heat-treated (524 MPa) and substrate plate heated samples (474 MPa) due to the presence of fine microstructure and the internal stresses. The reduction in strength of the sample produced with substrate plate heating is due to the coarsening of the microstructure, but the plastic deformation shows an improvement (20%). The present observations suggest that substrate plate heating can be effectively employed not only to minimize the internal stresses (by impacting the cooling rate of the process) but can also be used to modulate the mechanical properties in a controlled fashion.

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Tribological properties of selective laser melted Al 12Si alloy

Cited by 58 publications

References 50 publications

Mechanical Properties of SLM-Printed Aluminium Alloys: A Review

Mechanical Properties of SLM-Printed Aluminium Alloys: A Review

Tribological Performance of Additively Manufactured AISI H13 Steel in Different Surface Conditions

Effect of Substrate Plate Heating on the Microstructure and Properties of Selective Laser Melted Al-20Si-5Fe-3Cu-1Mg Alloy

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