Effect of rare earth Y and Al–Ti–B master alloy on the microstructure and mechanical properties of 6063 aluminum alloy

Ding, Wanwu; Zhao, Xiangen; Chen, Taili; Zhang, Haixia; Liu, Xiaoxiong; Cheng, Yan; Lei, Dongkai

doi:10.1016/j.jallcom.2020.154685

Cited by 94 publications

(33 citation statements)

References 26 publications

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“…Therefore, more and more liquid atoms reach the nucleation work through energy fluctuations, which improves the nucleation rate N according to Equation (2). In addition, during solidification of weld pool, rare-earth Y is enriched in the front of the solid-liquid interface due to the limitation of diffusion [ 31 ], the inter metallic compounds with high points containing rare-earth Y are dispersed at grain boundaries [ 31 ], which hinders the growth of the Mo 2 FeB 2 nucleus and refines the Mo 2 FeB 2 grain size. At the same time, Ce, Y active elements increase the fluidity of the liquid metal [ 32 ] and reduce the component supercooling during solidification as well as decrease the component segregation [ 33 ] to homogenize the structure.…”

Section: Resultsmentioning

confidence: 99%

Effect of Rare Earth on Microstructure and Wear Resistance of In-Situ-Synthesized Mo2FeB2 Ceramics-Reinforced Fe-Based Cladding

et al. 2020

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Mo2FeB2 ceramics-reinforced Fe-based cladding with various rare earth (RE) concentrations were prepared by the carbon arc surfacing process. The effects of RE content on the microstructure, phase composition, hardness and wear resistance of the cladding were systematically discussed. Meanwhile, the area fraction and grain size of Mo2FeB2 phase were exactly measured. Moreover, the refining mechanism of rare earth Y was analyzed. Results revealed that the claddings consisted of Mo2FeB2, FeCr, MoB and CrB. Adding the rare-earth Y decreased the grain sizes of Mo2FeB2 phase. Furthermore, grain-refining effects of Mo2FeB2 phase were significant when the RE content was 2% and hard phases evenly distributed in the cladding. In addition, the maximum microhardness value of claddings was about 1078 HV. The claddings with 2% RE contents had better wear resistance, which was equivalent to a sintered sample.

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Section: Resultsmentioning

confidence: 99%

Effect of Rare Earth on Microstructure and Wear Resistance of In-Situ-Synthesized Mo2FeB2 Ceramics-Reinforced Fe-Based Cladding

et al. 2020

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“…The fine and uniformly distributed TiAl 3 phase and the dispersed and isolated TiB 2 particles are all helpful in improving the refining effect of the refiner [29,30]. TiB 2 particles inoculated into the melt through the Al-Ti-B master alloys are able to enhance the heterogeneous nucleation of α-Al grains [31][32][33]. However, TiB 2 particles are small in size and easy to aggregate into clusters, which are difficult to separate when added into the melt metal.…”

Section: Discussionmentioning

confidence: 99%

Effects of Ultrasonic Bending Vibration Introduced by an L-Shaped Ultrasonic Rod on the Microstructure and Properties of a 1060 Aluminum Alloy Strip Formed by Twin-Roll Casting

et al. 2020

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In order to achieve the industrial application of ultrasonic energy in the continuous casting and rolling production of aluminum alloy, a new type of L-shaped ultrasonic rod was used to introduce an ultrasonic bending vibration into the aluminum melt in the launder during the horizontal twin-roll continuous casting and rolling process of a 1060 aluminum alloy. The effects of the ultrasonic bending vibration on the microstructure and properties of the 1060 aluminum alloy cast rolling strip and its subsequent cold rolling strip were studied experimentally, and the effect of the ultrasonic-assisted refining with different amounts of Al-Ti-B refiner was explored. The results show that under the same addition amount of Al-Ti-B refiner, the ultrasonic bending vibration can refine the grains of the cast rolling strip, make the distribution of precipitates more uniform, reduce the slag inclusion defects, and improve the mechanical properties to a certain extent. The microstructure and properties of the ultrasonic cast rolling strip with 0.18 wt% Al-Ti-B refiner or 0.12 wt% Al-Ti-B refiner are better than those of the conventional cast rolling strip, but the microstructure and properties of the ultrasonic cast rolling strip with 0.09 wt% Al-Ti-B refiner are slightly worse than those of the conventional cast rolling strip. Moreover, after cold rolling, the effect of the ultrasonic bending vibration on the improvement of the microstructure and properties of the aluminum alloy strip is inherited. A comprehensive analysis shows that the use of ultrasonic energy in this paper cannot completely replace the effect of the Al-Ti-B refiner, but it can reduce the addition amount of the Al-Ti-B refiner by 1/3.

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“…In the recent years, a number of works have studied the effect of rare earth elements additions on precipitation strengthening and properties of aluminum alloys. [ 12–24 ]…”

Section: Figurementioning

confidence: 99%

“…[ 15 ] It is shown that the addition of Y leads to an increase in the thermal stability of the alloys during annealing at temperatures of 250, 300, and 370 °C and removes the negative effect of the Fe and Si impurities. [ 18–20 ]…”

Section: Figurementioning

confidence: 99%

Effects of Er Additions on the Microstructure, Mechanical Properties, and Electrical Conductivity of the Al‐0.4Fe‐0.05Si Alloy

et al. 2020

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Aluminum alloy has been widely used in the fields of modern industry and high-voltage transmission due to its high specific strength, high performance-price ratio, and lightweight. The replacement of copper wire by aluminum wire has become an irreversible trend. [1-4] Fe and Si are present as impurities in aluminum alloys because the Al-Fe intermetallic is in the form of needles, flakes, and lath shapes and Si exists in the form of solid solution, which deteriorate the mechanical properties and electrical conductivity of the alloys seriously. [5-8] During the AA8011 alloy twin-roll casting process, the beta phase of AlFeSi, which has a needle-like morphology and adversely affects the formability, segregates in the center of the strip with a thickness of 10-15 μm. [9] When the addition of Al-TiC in Al-Si-Fe-Cu reaches 0.6 wt%, the average apparent length of the coarse second phase decreases to 15.37 μm. [10] The addition of Ni to Al-Fe-Si alloys can increase the electrical conductivity by 3%, but the addition of Mn and Cr will reduce the electrical conductivity by 5-10%. [11] Alloying is one of the important ways to reduce the harmful effects of Fe on the properties of aluminum alloys and improve the mechanical and electrical properties of alloys. In the recent years, a number of works have studied the effect of rare earth elements additions on precipitation strengthening and properties of aluminum alloys. [12-24] The added amount of La is even lower than 100 ppm, which can reduce the more effective heterogeneous nucleation conditions of eutectic silicon caused by P impurities. [12-14] The addition of La as low as 0.06 wt% is sufficient to achieve the ideal α-Al grain refinement, eutectic silicon modification, and improve the alloy plasticity. [12] The ultimate tensile strength (UTS) does not change with the increase in Ce concentration. [15-17] When the Ce content is increased to 0.6 wt%, the elongation of A356 alloy is improved, and the modification efficiency and elongation are the best with the content of Ce increasing to 0.1 wt%. [15] It is shown that the addition of Y leads to an increase in the thermal stability of the alloys during annealing at temperatures of 250, 300, and 370 C and removes the negative effect of the Fe and Si impurities. [18-20] Previous work has proved that the addition of Er in aluminum alloy also has a good effect on the improvement in precipitated phase morphology and properties. Zhang et al. studied the growth process and precipitation-strengthening mechanism of Al 3 Er phase in Al-0.045 at% Er alloy during isothermal aging at 300-400 C. [21] From the strength plateaus in radius of 1.4-2.4 nm, the anti-phase boundary (APB) energy of Al 3 Er precipitates was deduced to be 0.60 AE 0.03 J m À2. [21] The effect of adding Er on the crystallization properties and microstructure of Al-2 wt%Fe cast alloy by means of cooling curve thermal analysis was reported. [22] With the content of Er from 0.1 to 0.5 wt%, the supersaturated Er segregated at the α-Al/Al 3 Fe phase interface after solidifi...

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Effect of rare earth Y and Al–Ti–B master alloy on the microstructure and mechanical properties of 6063 aluminum alloy

Cited by 94 publications

References 26 publications

Effect of Rare Earth on Microstructure and Wear Resistance of In-Situ-Synthesized Mo2FeB2 Ceramics-Reinforced Fe-Based Cladding

Effect of Rare Earth on Microstructure and Wear Resistance of In-Situ-Synthesized Mo2FeB2 Ceramics-Reinforced Fe-Based Cladding

Effects of Ultrasonic Bending Vibration Introduced by an L-Shaped Ultrasonic Rod on the Microstructure and Properties of a 1060 Aluminum Alloy Strip Formed by Twin-Roll Casting

Effects of Er Additions on the Microstructure, Mechanical Properties, and Electrical Conductivity of the Al‐0.4Fe‐0.05Si Alloy

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