Effects of La on Microstructure and Corrosion Behavior of AlSi5Cu1Mg Alloy

Yu, Bao-biao; Yan, Hong; Zhu, Jiqing; Liu, Jianlong; Li, Huogen; Nie, Qiao

doi:10.1007/s40195-018-0782-9

Cited by 14 publications

(8 citation statements)

References 23 publications

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“…The corrosion resistance of an AlSi5Cu1Mg alloy with different La additions (0.3%, 0.6%, and 0.9%) was examined [12]. It was highlighted that the optimal La addition was 0.6 % reducing the corrosion rate by 40% (from 54 to 22 µAcm 2 ) with respect to the La-free alloy as showed in Table S3.…”

Section: Influence Of Addition Of Rare Earths On Corrosion Resistancementioning

confidence: 99%

“…The effect of the corrosion resistance of Er and Zr on an A-356 alloy obtained by permanent metal mold was studied by Colombo et al [13]. By performing immersion corrosion tests, they observed that the addition of Er decreased the corrosion rate from 45.8 µg/cm 2 d to 4.2 µg/cm 2 d and they associated this improvement with the modification of the morphology of eutectic silicon from The corrosion resistance of an AlSi5Cu1Mg alloy with different La additions (0.3%, 0.6%, and 0.9%) was examined [12]. It was highlighted that the optimal La addition was 0.6 % reducing the corrosion rate by 40% (from 54 to 22 µAcm 2 ) with respect to the La-free alloy as showed in Table S3.…”

Section: Influence Of Addition Of Rare Earths On Corrosion Resistancementioning

confidence: 99%

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Corrosion of Cast Aluminum Alloys: A Review

Labari

Biezma

Rivero

2020

Metals

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Research on corrosion resistance of cast aluminum alloys is reviewed in this article. The effect of the main microstructural features of cast aluminum alloys such as secondary dendrite arm spacing (SDAS), eutectic silicon morphology, grain size, macrosegregation, microsegregation, and intermetallic compounds is discussed. Moreover, the corrosion resistance of cast aluminum alloys obtained by modern manufacturing processes such as semi-solid and additive manufacturing are analyzed. Finally, the protective effects provided by different coatings on the aluminum cast alloys—such as anodized, plasma electrolytic oxidation (PEO), and laser—is reviewed. Some conclusions and future guidelines for future works are proposed.

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Section: Influence Of Addition Of Rare Earths On Corrosion Resistancementioning

confidence: 99%

Section: Influence Of Addition Of Rare Earths On Corrosion Resistancementioning

confidence: 99%

Corrosion of Cast Aluminum Alloys: A Review

Labari

Biezma

Rivero

2020

Metals

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“…Yang et al [4] reported that the addition of Be to the A357 alloy improved the microstructure of the β-Al 5 FeSi and Si phases, which increased the corrosion resistance of the alloy. Yu et al [5] reported that the addition of rare earth La refined the microstructure of the AlSi5Cu1Mg alloy, which improved the corrosion resistance in 3.5 wt% NaCl solution.…”

Section: Introductionmentioning

confidence: 99%

“…Our previous work [13] showed that the addition of 0.6 wt% (Pr+CePr+Ce) had the best refinement effect on the microstructure of AlSi5Cu1Mg alloy. The corrosion resistance of the alloy depends on the morphology of the microstructure [5,14]. In this paper, our aim is to investigate the effect of (Pr+Ce) addition and T6 heat treatment on microhardness and corrosion of AlSi5Cu1Mg alloy.…”

Section: Introductionmentioning

confidence: 99%

Effect of (Pr + Ce) addition and T6 heat treatment on microhardness and corrosion of AlSi5Cu1Mg alloy

Zou

Yan

et al. 2020

Mater. Res. Express

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The effects of T6 heat treatment and 0.6 wt% (Pr+Ce) addition on microstructure, microhardness, and corrosion of AlSi5Cu1Mg alloy were investigated. Optical microscopy and scanning electron microscopy revealed that the T6 heat treatment and the addition of 0.6 wt% (Pr+Ce) effectively refined the α-Al and eutectic Si phases, which were uniformly distributed with Al 2 Cu phase in the alloy. Microhardness, weight loss, hydrogen evolution, Tafel polarization, and EIS tests showed that the combination of T6 heat treatment and 0.6 wt% (Pr+Ce) addition resulted in the best corrosion resistance and microhardness of the alloy. The microhardness of the AlSi5Cu1Mg+0.6 wt% (Pr+Ce)/T6 (115 HV) was 27.8% higher than that of the matrix (90 HV). At the same time, the corrosion current density of the alloy also reached the minimum value (38.4 μA cm −2 ). The T6 heat treatment and the addition of (Pr+Ce) can significantly decrease the average grain size, change the redistribution of the precipitated Al 2 Cu phase, refine the Si phase, and increase the pitting formation position, thus reducing the sensitivity of exfoliation corrosion.

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“…The sole addition of Bi is reported to be favorable in obtaining the modified eutectic phase [10]; nevertheless, the addition of Bi along with Sr exhibited the poisoning effect and reduced the modification effectiveness to some extent [11]. Moreover, some other studies [12][13][14][15] claimed that the inclusion of La significantly modifies the microstructure, mechanical, and corrosion resistance properties of Al-Si alloys. Ahmad R [16] investigated the modification role Ce addition; whereas, Jiang et al [17] evaluated the collective effect of rare earth (La and Ce) elements and declared that a suitable amount of rare earth mixture alters almost all microstructure features and improves mechanical properties considerably.…”

Section: Introductionmentioning

confidence: 99%

Concurrent effects of various B additions on grain refinement, Fe intermetallics morphologies, and ductility evolution of Al-7.5Si-0.55 Mg (A357) cast alloy

et al. 2020

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Simultaneous effects of boron (B) additions on grain refinement, morphological changes in Fe-intermetallic compounds, and consequent variations in mechanical responses of the cast Al-7.50Si-0.55 Mg (A357) alloys are evaluated in this research work. The contents B are varied from 0.002 to 0.40 wt. % and subsequent changes in the grain size and Feintermetallics morphologies are assessed through polarized light images, optical micrography, and scanning electron microscopy. A small addition of B (0.04 wt. %) yields identical refinement result (620 µm) as noted for commercial grain refiner Al-5Ti-1B (642 µm); whereas, the higher amount (0.40 wt. % of B) reduces the grain size up to 44% (360 µm). In as-cast state, the structure of the π-Fe phase is transmuted from plate/needle-type to Chinese-script particles for increased quantities (0.10 ~ 0.40 wt. %) of B. Contrarily, the heat-treatment (T6) causes the depletion of Mg and B from the π-Fe phase Chinese-script morphologies and disintegrates them by creating segregated regions of Fe particles. These agglomerated areas of Fe particles act as stress concentration points during tensile loading and considerably decrease the ductility values from 6.7 to 1.8%. Therefore, it implies that great care must be taken while developing B containing grain refiners.

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Effects of La on Microstructure and Corrosion Behavior of AlSi5Cu1Mg Alloy

Cited by 14 publications

References 23 publications

Corrosion of Cast Aluminum Alloys: A Review

Corrosion of Cast Aluminum Alloys: A Review

Effect of (Pr + Ce) addition and T6 heat treatment on microhardness and corrosion of AlSi5Cu1Mg alloy

Concurrent effects of various B additions on grain refinement, Fe intermetallics morphologies, and ductility evolution of Al-7.5Si-0.55 Mg (A357) cast alloy

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