Aluminium matrix composites (AMCs) by DMLS

Manfredi, Diego; Canali, Riccardo; Krishnan, Manickavasagam; Ambrosio, Elisa Paola; Calignano, Flaviana; Pavese, Matteo; Miranti, Lorenzo; Belardinelli, Simone; Biamino, Sara; Fino, Paolo

doi:10.1201/b15961-47

Cited by 7 publications

(8 citation statements)

References 1 publication

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“…However, the water-pump has yet to be tested in a race car. Manfredi et al 156 examined the possibility of creating lightweight structural parts for robotics applications and built a first finger exoskeleton.…”

Section: Other Metalsmentioning

confidence: 99%

Review of selective laser melting: Materials and applications

Yap

Chua

Dong

et al. 2015

Applied Physics Reviews

1,782

647

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It is well known that adding small amounts of Ti and B into aluminium casting alloys increase the fluidity, feedability, strength, fatigue resistance and pressure tightness. These occur because of Ti and B within the master alloys create heterogeneous nucleation sites by forming such intermetallic compounds as TiB 2 , Al 3 Ti and AlB 2. It is also known that the solidification time is influential on the formation of final grain size of aluminium cast parts. However the combining effects of both grain refining and solidification time has not been studied properly. Therefore, in this work, the effects of the grain refining and solidification time have been investigated on a sand-cast Al-4wt%Cu alloy. To determine solidification time effect, a tests mould having different section thickness has been used.

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Section: Other Metalsmentioning

confidence: 99%

Review of selective laser melting: Materials and applications

Yap

Chua

Dong

et al. 2015

Applied Physics Reviews

1,782

647

View full text Add to dashboard Cite

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“…Furthermore, MgAl 2 O 4 is crystallographically compatible with aluminium on a specific set of planes, suggesting that a good interface can form between matrix and reinforcement, thanks to the lattice mismatch of the MgAl 2 O 4 (100) plane with the Al (100) plane, which is only 0.25% [16,17]. For these peculiar features, a previous investigation of AlSi10Mg powder with 1 wt % of nanoMgAl 2 O 4 ceramic particles was carried out, obtaining nanocomposites with lower hardness and densification level than the alloy [18]. In addition, it was demonstrated that also a lower filler content does not imply a positive effect on the mechanical performances of the AlSi10Mg alloy [19].…”

Section: Introductionmentioning

confidence: 99%

Development and Characterisation of Aluminium Matrix Nanocomposites AlSi10Mg/MgAl2O4 by Laser Powder Bed Fusion

Marchese

Aversa

Lorusso

et al. 2018

Metals

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Recently, additive manufacturing techniques have been gaining attention for the fabrication of parts from aluminium alloys to composites. In this work, the processing of an AlSi10Mg based composite reinforced with 0.5% in weight of MgAl 2 O 4 nanoparticles through laser powder bed fusion (LPBF) process is presented. After an initial investigation about the effect of process parameters on the densification levels, the LPBF materials were analysed in terms of microstructure, thermo-mechanical and mechanical properties. The presence of MgAl 2 O 4 nanoparticles involves an increment of the volumetric energy density delivered to the materials, in order to fabricate samples with high densification levels similar to the AlSi10Mg samples. However, the application of different building parameters results in modifying the size of the cellular structures influencing the mechanical properties and therefore, limiting the strengthening effect of the reinforcement.

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“…No evident correlation between density and hardness was found, which is in agreement with other studies. [ 16 ] The AM sample after T6 heat treatment showed the lowest density but the highest hardness of approximately twice that of the as‐produced GC sample, despite their comparable density.…”

Section: Resultsmentioning

confidence: 99%

“…Stainless steel, [5] Ti, [6] Co, [7] Ni, [8] and Al [9] alloys have been widely investigated in the literature, and Cu, [10] Mg, [11] and Au [12] alloys are attracting increased interest. The LPBF technique can be applied in the fields of aerospace, [13] aviation, [14] and automotive [15] industries, as well as the production of robotic components, [16] orthopedic implants, [17] or simple prototypes. [18] Regarding the automotive field, according to the new target to reduce CO 2 passenger car emissions from 2025 to 2030, established by EU regulations, [19] there is a need to further reduce car weight to minimize harmful emissions and improve fuel economy.…”

Section: Introductionmentioning

confidence: 99%

Wear Behavior of AlSi10Mg Alloy Produced by Laser‐Based Powder Bed Fusion and Gravity Casting

et al. 2021

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Herein, the sliding wear behavior of AlSi10Mg samples realized using laser‐based powder bed fusion (LPBF) is investigated via pin‐on‐disc (PoD) tests, before and after T6 heat treatment. The changes in the microstructure, density, and hardness induced by heat treatment are correlated with the tribological behavior of the alloy. Furthermore, short wear tests are conducted and the resulting wear tracks are investigated through scanning electron microscopy (SEM), equipped with an energy‐dispersive spectroscopy (EDS) microprobe to elucidate how the wear mechanisms evolve with sliding distance. For comparison, gravity cast (GC) AlSi10Mg samples are also characterized and tested. The as‐built additive manufacturing (AM) sample exhibits the lowest wear rate and coefficient of friction because of its high hardness and relative density, whereas the heat‐treated sample shows the worst behavior in comparison with the GC samples. The results suggest a significant influence of porosity on the wear behavior of AM alloys.

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Aluminium matrix composites (AMCs) by DMLS

Cited by 7 publications

References 1 publication

Review of selective laser melting: Materials and applications

Review of selective laser melting: Materials and applications

Development and Characterisation of Aluminium Matrix Nanocomposites AlSi10Mg/MgAl2O4 by Laser Powder Bed Fusion

Wear Behavior of AlSi10Mg Alloy Produced by Laser‐Based Powder Bed Fusion and Gravity Casting

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