The microstructure and formation mechanism of core–shell-like TiAl3/Ti2Al20Ce in melt-spun Al–Ti–B–Re grain refiner

Wang, Kui; Cui, Chunxiang; Wang, Qian; Liu, Shuangjin; Gu, Cunshuai

doi:10.1016/j.matlet.2012.06.072

Cited by 43 publications

(17 citation statements)

References 14 publications

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“…The affect of TiC together with Al 3 Ti granulation on the heterogeneous nucleation of α-Al pellet has been covered together with verified by other researchers [16][17][18]. It has been reported that Ti 2 A1 20 RE can not exist stably in the aluminum alloy melt [19,20], it will dissolve and provide a lot of RE for the aluminum melt [21]. A large number of research reports have confirmed that RE has a good modification effect on eutectic Si by forming nano rare earth phase [22] or inhibiting Si twin growth [23].…”

Section: Resultsmentioning

confidence: 58%

Effects of Al-5Ti-0.62C-1.07La intermediate alloy on the microstructure and mechanical properties of A356 aluminum alloy

Ding

Zhang

et al. 2020

Mater. Res. Express

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The physical characters that belong to hypo-eutectic Al-Si alloys are affected by certain important factors including the dimension, distribution together with structure of eutectic Si crystals together with primary α-Al. In this paper, A356-x Al-5Ti-0.62C-1.07La (x=0, 4, 5, 6, 7 wt%) alloys are was prepared by mechanical stirring. The effects of Al-5Ti-0.62C-1.07La intermediate alloy on the microstructures and mechanical properties of A356 alloy are investigated. Results show that the primary α-Al was significantly refined by Al-5Ti-0.62C-1.07La intermediate alloy. The secondary dendrite arm space (SDAS) of unrefined α-Al is approximately 40 μm. When the substance of Al-5Ti-0.62C-1.07La intermediate alloy is 6 wt%, SDAS declines to 10 μm. In addition, the component part of eutectic Si turns from thick acicular/schistose to short rod-like together with a section of pellets. Adding 6 wt% Al-5Ti-0.62C-1.07La intermediate alloy, A356-T6 alloy obtained the best tensile function and hardness. The ultimate tensile strength (UTS), elongation (El) together with Vickers hardness (HV) are 183.5 MPa, 8.2% and 62.3, which is increased by 30.3%, 95.2% and 38.1%, respectively. Furthermore, the variation in mechanical properties change with the development of micro-structure.

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Section: Resultsmentioning

confidence: 58%

Effects of Al-5Ti-0.62C-1.07La intermediate alloy on the microstructure and mechanical properties of A356 aluminum alloy

Ding

Zhang

et al. 2020

Mater. Res. Express

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“…During the nucleation and growth, RE easily gathered in the front of the solid-liquid interface because of the solute redistribution. According to the report of Wang et al [10], the value of constitutional supercooling parameter of RE (Ce) was much higher than that of other elements such as Ti and Fe. Thus, a strong constitutional undercooling occurred, which decreased the growth rate of the growing interface and restricted the growth of nucleation of a-Al.…”

Section: Discussionmentioning

confidence: 95%

“…Recently, Xu et al [9] found that the addition of rare earth (RE) elements in the preparation process of AlTi-B grain refiner could decrease the size of Al 3 Ti, which improved the refining efficiency of Al-Ti-B refiner. Wang et al [10] prepared novel AlTiB-RE nanorefiners by meltspinning in a LZK-12A-type vacuum quenching furnace using the raw materials of commercial Al-5Ti-B rods and Ce-rich mischmetal. The application of novel AlTiB-RE Available online at http://link.springer.com/journal/40195 & Hu Zhang zhanghu@buaa.edu.cn 1 nanorefiners showed that the RE hindered the nucleating particles from aggregating and precipitating.…”

Section: Introductionmentioning

confidence: 99%

Cooling Rate Sensitivity of RE-Containing Grain Refiner and Its Impact on the Microstructure and Mechanical Properties of A356 Alloy

Zhang

Liu

et al. 2016

Acta Metall. Sin. (Engl. Lett.)

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The cooling rate sensitivities of AlTiB, RE and AlTiB-RE refiners were investigated using laboratory experiments and the actual industrial applications of A356 automotive wheel via low pressure die casting technology. Their impact mechanisms on the microstructure and mechanical properties of the A356 alloy were discussed. The results demonstrated that the AlTiB-RE refiner possessed most effective and synergetic refinement effects compared to the individual AlTiB or RE refiners. The AlTiB-RE refiner exhibited the least sensitivity to the cooling rate changes than the other refiners. The comprehensive properties of alloy wheel refined by the AlTiB-RE refiner were improved significantly. The tensile strength, yield strength, and elongation of wheel spoke improved by approximately 11.3%, 10.8% and 44.1%, respectively. The property difference values of the tensile strength, yield strength, and elongation in different positions of the wheel decreased from 14.8%, 31.2% and 47.7% to 8.6%, 27.1% and 30.9%, respectively.

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“…As typical rapid solidification technology, melt spinning has been paid much attention for microstructure refinement, chemical homogeneity and improvement of solid solubility [8,14,15]. In particular, it is possible to promote the formation of ultra-fine secondary phase particles when the cooling rate exceeds 10 4 K/s [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Effect of Cooling Rate on Microstructure and Grain Refining Behavior of In Situ CeB6/Al Composite Inoculant in Aluminum

Liu

Cui

Wang

et al. 2017

Metals

Self Cite

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Abstract:Melt spinning was performed to process an in situ CeB 6 /Al inoculant at different rotating speeds to investigate the influence of cooling rate on the grain refining behavior of inoculants. It has been found that a high cooling rate caused two obvious changes in the inoculant: the supersaturated solid solution of Ce in the α-Al matrix and the miniaturization of CeB 6 particles. At high cooling rates of~10 8 K/s, the Ce content is largely beyond the theoretical solid solubility of Ce in Al, and the size of the CeB 6 particles in ribbons is reduced to~100 nm. The grain refining effect of melt-spun CeB 6 /Al composite inoculant shows significant dependence on holding time of which the best value should be no more than 2 min. The excellent grain refinement of the inoculant can be attributed to the combined effect of the nano-sized refiner particles and the large undercooling caused by the sudden melting of supersaturated Al-Ce solution.

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The microstructure and formation mechanism of core–shell-like TiAl3/Ti2Al20Ce in melt-spun Al–Ti–B–Re grain refiner

Cited by 43 publications

References 14 publications

Effects of Al-5Ti-0.62C-1.07La intermediate alloy on the microstructure and mechanical properties of A356 aluminum alloy

Effects of Al-5Ti-0.62C-1.07La intermediate alloy on the microstructure and mechanical properties of A356 aluminum alloy

Cooling Rate Sensitivity of RE-Containing Grain Refiner and Its Impact on the Microstructure and Mechanical Properties of A356 Alloy

Effect of Cooling Rate on Microstructure and Grain Refining Behavior of In Situ CeB6/Al Composite Inoculant in Aluminum

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