Distinct Alp/Sip composites affecting its densification and mechanical behavior

Bonatti, Rodrigo S.; Siqueira, Rayane R.; Padilha, Giovana Silva; Bortolozo, Ausdinir D.; Osório, Wislei R.

doi:10.1016/j.jallcom.2018.05.055

Cited by 26 publications

(31 citation statements)

References 36 publications

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“…On the other hand, the peaks that appear at ~ 28°, 48°, 56°, 77°, and 88° indicate the presence of the eutectic Si phase in the Bragg planes (111), ( 220), (311), (331), and (422). These results are consistent with other investigations of AlSi alloys as well as sintered compounds of these [35][36][37] Weaker peaks at approximately 41°, 42°, and 69° corresponding to the (220) and ( 222) Bragg planes indicating the minority presence of Al2Cu [38]. [38].…”

Section: Microstructural Characterization Of Aluminum Alloy Castingssupporting

confidence: 92%

“…On the other hand, the peaks that appear at~28 • , 48 • , 56 • , 77 • , and 88 • indicate the presence of the eutectic Si phase in the Bragg planes (111), ( 220), (311), (331), and (422). These results are consistent with other investigations of AlSi alloys as well as sintered compounds of these [35][36][37]. Figure 5 and Table 2 show the experimental results of the XRD patterns of the four samples studied (sand mold and binder jetting mold in the outer and central zones).…”

Section: Microstructural Characterization Of Aluminum Alloy Castingssupporting

confidence: 89%

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Comparative Study on Microstructure and Corrosion Resistance of Al-Si Alloy Cast from Sand Mold and Binder Jetting Mold

Sastre

Cabezón

Abia

et al. 2021

Metals

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This investigation is focused on the corrosion evaluation of an as-cast Al-Si alloy, obtained by two different casting methods: traditional sand casting and three-printing casting, using a binder jetted mold. The experimental results are discussed in terms of chemical composition, microstructure, hardness, and corrosion behavior of two different casting parts. The microstructure and composition of the sample before and after the corrosion tests was analyzed using light microscopy (OM), scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDX) and X-ray diffraction (DRX). The corrosion of the two processed castings was analyzed using anodic polarization (PA) test and electrochemical impedance spectroscopy (EIS) in an aerated solution of 3.5% by weight NaCl, similar to the seawater environment. After the corrosion process, the samples were analyzed by inductively coupled plasma/optical emission spectrometry (ICP/OES); the composition was used to determine the chloride solution after immersion times. The sample processed by binder jetting mold showed higher corrosion resistance with nobler potentials, lower corrosion densities, higher polarization resistance, and more stable passive layers than the sample processed by sand casting. This improvement of corrosion resistance could be related to the presence of coarse silicon particles, which decrease of cathodic/anodic ratio and the number of micro-galvanic couples, and the lower amount of intermetallic β Al-Fe-Si phase observed in cast alloy solidified in binder jetting mold.

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Section: Microstructural Characterization Of Aluminum Alloy Castingssupporting

confidence: 92%

Section: Microstructural Characterization Of Aluminum Alloy Castingssupporting

confidence: 89%

Comparative Study on Microstructure and Corrosion Resistance of Al-Si Alloy Cast from Sand Mold and Binder Jetting Mold

Sastre

Cabezón

Abia

et al. 2021

Metals

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“…The mortar and pestle are also used to mixture mechanically ($5 min) all portions proposed, as previously shown. 15 Also, no polyvinyl alcohol or similar product is used. 15 In order to verify the effect of particle sizes, the ratio of the average size of the sizes (diameters) of Cu and Si powders to the Al ductile matrix is designated as the "size ratio", as reported by Hafizpour and Simchi.…”

Section: Materials and Specimen Preparationmentioning

confidence: 99%

“…The experimental investigations considering elemental powders to constitute Al composite using both ductile and hard particles are scarce. [14][15][16][17][18][19] From those reported studies, some complementary treatments or distinctive routes are considered, e.g. ball mill mixing, hot pressing, stirring and infiltration casting, [19][20][21][22][23][24][25][26] severe plastic deformation, and/or high long-term heat treatments (higher than 10 hours).…”

Section: Introductionmentioning

confidence: 99%

Distinct heat treatments and powder size ratios affecting mechanical responses of Al/Si/Cu composites

Satizabal

Caurin

Meyer

et al. 2021

Journal of Composite Materials

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The aim in this investigation is focused on the evaluation of two distinctive powder size ratios of pure elements (Al, Si and Cu) powders. Heat treatments (T4 and T6) affecting the mechanical strengths of Al/Si/Cu composites are also investigated. The novelty concerns to pure elements to constituting the composites and no melting or stir casting route are used. It is found that the densifications and tensile strengths are similar when distinct powder size ratios are used. It is also found that T4 and T6 treatments increases and decreases the mechanical strengths, respectively. The Si content indicates a deleterious effect in mechanical behavior. The T6 aging provides θ-Al2Cu incoherent with Al matrix, and the compressive strength is decreased. This suggests that the examined Al/Cu composites (using pure powders) are potential materials considering economical and environmentally friendly aspects.

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“…According to them, two factors contributing to the improvement of hardness are solid solution hardening and refinement of grain size. It has widely been reported [37][38][39][40][41] that distribution phases and morphology of alloys have important roles on the resulting properties. These are intimately associated with the operational conditions applied indistinctively of the nature and characteristic of the examined material.…”

Section: Introductionmentioning

confidence: 99%

Effect of Growth Velocity and Zn Content on Microhardness in Directionally Solidified Al-Zn Alloys

Acer¹,

Çadırlı

Erol

et al. 2018

Mat. Res.

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In this study, Al-xZn (x=1, 3, 5, 7, 10 and 20 wt. %) alloys were prepared using metals of 99.99% high purity in the vacuum atmosphere. These alloys were directionally solidified upward with a constant temperature gradient, G (10.3 K/mm) and different growth velocities (V) between 8.25 and 165 µm/s in the directional solidification apparatus. The experimental results have revealed that with the increase of the growth velocity of the melts from 8.25 µm/s to 165 µm/s, the microstructures undergo a transition from cellular/cellular dendritic morphology to coarse dendritic form for each composition (Zn content, C o). The measurements of microhardness (HV) of the specimens were performed by using a microhardness test device. The dependence of HV on V and C o was analyzed, and it has been found that with increasing the V and C o the HV increases. Relationships between HV-V and HV-C o were obtained by linear regression analysis, and the experimental results were compared with the results of previous similar works.

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Distinct Alp/Sip composites affecting its densification and mechanical behavior

Cited by 26 publications

References 36 publications

Comparative Study on Microstructure and Corrosion Resistance of Al-Si Alloy Cast from Sand Mold and Binder Jetting Mold

Comparative Study on Microstructure and Corrosion Resistance of Al-Si Alloy Cast from Sand Mold and Binder Jetting Mold

Distinct heat treatments and powder size ratios affecting mechanical responses of Al/Si/Cu composites

Effect of Growth Velocity and Zn Content on Microhardness in Directionally Solidified Al-Zn Alloys

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