Impact of rare earth element la on microstructure and hot crack resistance of ADC12 alloy

Song, Xianchen; Yan, Hong; Chen, Fanhui

doi:10.1007/s11595-018-1805-0

Cited by 11 publications

(10 citation statements)

References 14 publications

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“…Niu et al [19] fused a cobalt-based powder modified by CeO 2 onto the surface of 316L stainless steel, and their results showed that the mechanical properties of the 316L stainless steel were the best when the additional content of CeO 2 was 1.5 wt %. Song et al [20] also found that when La was added as a modifying agent and its content was 0.6 wt %, the ADC12 alloy had the best inoculation effect and highest thermal crack resistance.…”

Section: Introductionmentioning

confidence: 98%

Effect of Rare Earth Oxides on Microstructure and Corrosion Behavior of Laser-Cladding Coating on 316L Stainless Steel

Wang

Chen

et al. 2019

Coatings

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The effect of rare earth oxides on the microstructure and corrosion behavior of laser-cladding coating on 316L stainless steel was investigated using hardness measurements, a polarization curve, electrochemical impedance spectroscopy (EIS), a salt spray test, X-ray diffraction, optical microscopy, and scanning electron microscopy (SEM). The results showed that the modification of rare earth oxides on the laser-cladding layer caused minor changes to its composition but refined the grains, leading to an increase in hardness. Electrochemical and salt spray studies indicated that the corrosion resistance of the 316L stainless steel could be improved by laser cladding, especially when rare earth oxides (i.e., CeO2 and La2O3) were added as a modifier.

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Section: Introductionmentioning

confidence: 98%

Effect of Rare Earth Oxides on Microstructure and Corrosion Behavior of Laser-Cladding Coating on 316L Stainless Steel

Wang

Chen

et al. 2019

Coatings

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“…The alloy containing both Ce and Ti had a relatively lower Vickers hardness and strength compared to the alloy containing individual additions of Ce or Ti. In another research, Song et al [79] reported that Ce improved the thermal stability of the Ω phase by decreasing the diffusion velocity of the Cu atoms, and hence decreasing the coarsening speed of the phase, as well as through the aggregation of Ce atoms at the Ω phase/Al matrix interface, increasing the energy barrier for the thickening of the Ω phase plates which coarsen through a ledge nucleation mechanism. The strength of the Al-Cu-Mg-Ag alloy is improved, as a result.…”

Section: Effects Of Cerium Additionsmentioning

confidence: 99%

“…It was also observed that with 1.0 wt.% Ce, the alloy produced the highest reduction in the liquidus temperature from 686.6°C to 591.9°C. [79].…”

Section: Effects Of Cerium Additionsmentioning

confidence: 99%

Applications of Rare Earth Metals in Al-Si Cast Alloys

Mahmoud¹,

Zedan²,

Samuel³

et al. 2021

Advances in High-Entropy Alloys - Materials Research, Exotic Properties and Applications

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The present article reviews a large number of research publications on the effect of mischmetal (MM), rare earth metals (RE), La or Ce, and combinations of La + Ce on the performance of Al-Si cast alloys mainly 319, 356, 380, 413, and 390 alloys. Most of these articles focused on the use of rare earth metals as a substitute for strontium (Sr) as a eutectic silicon (Si) modifier if added in low percentage (< 1 wt.%) to avoid precipitation of a significant amount of insoluble intermetallics and hence poor mechanical properties. Other points that were considered were the affinity of RE to react with Sr., reducing its effectiveness as modifier, as well as the grain refining efficiency of the added RE in any form. None of these articles mentioned the exact composition of the RE used and percentage of tramp elements inherited from the parent ore. Using high purity La or Ce proved to have no effect on the Si shape, size or distribution, in particular at low solidification rates (thick sections). However, regardless the source of the RE, its addition to Sr-modified alloys reduced the modification effect. As for grain refining, apparently a high percentage of RE (> 1 wt.%) is required to achieve a noticeable reduction in grain size, however at the cost of alloy brittleness.

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“…The mechanical properties are improved by the addition of Sr, where good UTS and breaking elongation were obtained. Studies [3][4][5][6][7] show that some rare earth (RE) elements play a role in modifying the Al-Si cast aluminum alloys. Song et al [8] investigated the impact that La had on the microstructure and hot crack resistance of an ADC12 alloy.…”

Section: Introductionmentioning

confidence: 99%

“…Previous studies [2][3][4][5][6][7][8][9][10] regarding the modification of the Al-Si alloy by mono-rare earth elements are informative. The similarity effect that the mixed rare earths had on the Al alloys is known, which alleviates the restrictions with solubility for the mono-rare earth elements, and the formation of the coarser intermetallic compounds is avoided, which improves heterogeneous nucleation.…”

Section: Introductionmentioning

confidence: 99%

Effect of (Pr+Ce) Additions on Microstructure and Mechanical Properties of AlSi5Cu1Mg Alloy

et al. 2019

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The microstructure and mechanical properties of AlSi5Cu1Mg alloy with (Pr+Ce) addition were investigated by optical microscopy (OM), energy dispersive spectroscopy (EDS), and scanning electron microscopy (SEM). The results demonstrated that the rare earth (Pr+Ce) addition refined the grain. The long needle-like eutectic Si phases turned to granual. The secondary dendrite arm spacing (SADS) of the primary α-Al phase with the AlSi5Cu1Mg+0.6 wt.% (Pr+Ce) alloy reached the minimum value, which decreased by 50.2%. The mean length and the aspect ratio of the eutectic Si decreased by 78.8% and 67.4%. The ultimate tensile strength (UTS), the microhardness, and the breaking elongation of the AlSi5Cu1Mg+0.6 wt.% (Pr+Ce) alloy reached a maximum, and increased by 21.5%, 21.7%, and 8.0% compared to the AlSi5Cu1Mg alloy. The fracture examinations manifested in cleaved surfaces and brittle fracture areas, which were seen from the AlSi5Cu1Mg+0.6 wt.% (Pr+Ce) alloy. The number of dimples slightly increased.

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Impact of rare earth element la on microstructure and hot crack resistance of ADC12 alloy

Cited by 11 publications

References 14 publications

Effect of Rare Earth Oxides on Microstructure and Corrosion Behavior of Laser-Cladding Coating on 316L Stainless Steel

Effect of Rare Earth Oxides on Microstructure and Corrosion Behavior of Laser-Cladding Coating on 316L Stainless Steel

Applications of Rare Earth Metals in Al-Si Cast Alloys

Effect of (Pr+Ce) Additions on Microstructure and Mechanical Properties of AlSi5Cu1Mg Alloy

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