Mechanical Properties and Microstructural Evolution of Yb-Modified Al-20%Si Alloy

Li, Qinglin; Li, Jinbao; Li, Binqiang; Zhu, Yuqian; Liu, Dexue; Lan, Yaqi; Wang, Shu

doi:10.1007/s11665-018-3456-x

Cited by 25 publications

(11 citation statements)

References 33 publications

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“…A number of scientific investigations are reported in the literature on the effects of rare earth elements and mischmetal (MM), which is a mixture of rare earth (RE) elements found in abundance in nature with Cerium (Ce) and Lanthanum (La) together comprising approximately 90% of mischmetal. The RE metals investigated include Cerium (Ce), Lanthanum (La), Yttrium (Y) [20][21][22][23][24][25], Erbium (Er) [26][27][28][29][30], Neodymium (Nd) [31][32][33][34][35], Ytterbium (Yb) [36][37][38][39][40], Samarium (Sm) [41][42], Scandium (Sc) [43][44][45][46][47], Europium (Eu) [48,49], and Gadolinium (Gd) [50]. Among these, the effects of MM, Ce, La and mixed additions of Ce and La are reviewed.…”

Section: W Solution Heat-treatedmentioning

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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Section: W Solution Heat-treatedmentioning

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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“…Among them, Sc is the most prominent, and others like Er, La, Ce, Yb, etc. also have a good development potential [8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Effect of Er on Microstructure and Mechanical Properties of 5052 Aluminum Alloy with Big Width-To-Thickness Ratio

et al. 2020

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The effect of Er on microstructure and mechanical properties of the 5052 aluminum alloy with a big width-to-thickness ratio was investigated by a metallurgical microscope, scanning electron microscope and tensile testing machine. The results showed that the precipitates were slightly refined after Er addition and Al3Fe was transformed into Al6Fe and AlEr with/without a small amount of Fe or Si. The effect of Er on grain refinement was related to its content. When Er content was lower or higher than 0.4%, the grain would coarsen. Homogenization could refine the grain by controlling Er content and distribution in the Al matrix. Long time homogenization at high temperature would significantly reduce the strength of the 5052 aluminum alloy and 5052 aluminum alloys with low Er content, but help to improve the plasticity of those with high Er content. The ultimate tensile strength, yield strength and elongation of the as-cast 5052 aluminum alloy were 197 MPa, 117 MPa and 22.5% respectively. The strength was the highest, when Er content was 0.4 wt. % and the elongation was the best at 0.1 wt. % Er content.

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“…[ 1 , 2 , 3 ]. Among these superior properties, the excellent wear resistance of PRAMCs has increased attention towards tribological applications, especially, hypereutectic Al-Si alloy matrixes with 13–20 wt% Si, have been widely used for applications in automobile components, such as engine blocks, cylinder, heads, brake rotors and pistons, due to the merits of their light weight, high specific strength and excellent wear resistance [ 4 , 5 , 6 , 7 ]. So far various commonly used reinforcement particulates have been used, such as TiB 2 [ 8 ], B 4 C [ 9 ], SiO 2 [ 10 ], Al 2 O 3 [ 11 ], TiC [ 12 ], Si 3 N 4 [ 13 ] and SiC [ 14 ].…”

Section: Introductionmentioning

confidence: 99%

Effects of CeO2 Content on Friction and Wear Properties of SiCp/Al-Si Composite Prepared by Powder Metallurgy

et al. 2020

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SiCp/Al-Si composites with different CeO2 contents were prepared by a powder metallurgy method. The effect of CeO2 content on mechanical properties, friction and wear properties of the composites was studied. The results show that with the increase in CeO2 content from 0 to 1.8 wt%, the density, hardness, friction coefficient of the composites first increases and then decreases, the coefficient of thermal expansion (CTE) and wear rate of the composites first decreases and then increases. When the content of CeO2 was 0.6 wt%, the density and hardness of the composite reached the maximum value of 98.54% and 113.7 HBW, respectively, the CTE of the composite reached the minimum value of 11.1 × 10−6 K−1, the friction coefficient and wear rate of the composite reached the maximum value of 0.32 and the minimum value of 1.02 mg/m, respectively. CeO2 has little effect on the wear mechanism of composites, and the wear mechanism of composites with different CeO2 content is mainly abrasive wear under the load of 550 N. Compared with the content of CeO2, load has a great influence on the wear properties of the composites. The wear mechanism of the composites is mainly oxidation wear and abrasive wear under low load. With the increase in load, the wear degree of abrasive particles is aggravated, and adhesive wear occurs under higher load.

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Mechanical Properties and Microstructural Evolution of Yb-Modified Al-20%Si Alloy

Cited by 25 publications

References 33 publications

Applications of Rare Earth Metals in Al-Si Cast Alloys

Applications of Rare Earth Metals in Al-Si Cast Alloys

Effect of Er on Microstructure and Mechanical Properties of 5052 Aluminum Alloy with Big Width-To-Thickness Ratio

Effects of CeO2 Content on Friction and Wear Properties of SiCp/Al-Si Composite Prepared by Powder Metallurgy

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