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Journal of Materials Engineering and Performance

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24-09-2021

Effects of Cooling Rate on Particle Size, Morphology, and Refining Effect of In-Situ NdB₆-Al₁₁Nd₃/Al Inoculants

Authors: Jinhua Ding, Cheng Lu, Chunxiang Cui, Yijiao Sun, Jing Ding

Published in: Journal of Materials Engineering and Performance | Issue 2/2022

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Abstract

The in-situ NdB₆-Al₁₁Nd₃/Al inoculants were prepared by melt-spinning technology. The effects of cooling rate on the size and morphology of the NdB₆ particles were researched. With the decrease of cooling rate, the average particle size increases, and the particle morphologies were changed from spherical to cubic gradually. The effects of the in-situ NdB₆-Al₁₁Nd₃/Al inoculants on the evolvement of microstructure and mechanical properties of Al-5.8Cu-0.3Mn alloy were investigated in detail. The results of OM showed that the NdB₆-Al₁₁Nd₃/Al inoculants had obvious refining effect on the Al-5.8Cu-0.3Mn alloy. The inoculants prepared at the highest cooling rate showed the best refining effect. The refining mechanism was studied by HRTEM. And the analysis results indicated that the in-situ NdB₆ particles could form a good coherent interface with α-Al matrix, and thus played a role in the heterogeneous nucleation of the matrix. In addition, the excess rare-earth neodymium could also effectively refine grains and reduce the hydrogen porosities. The tensile strength of Al-5.8Cu-0.3Mn alloy was improved from 435 to 506 MPa, and the elongation was increased from 8.4 to 10.4%.

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Title: Effects of Cooling Rate on Particle Size, Morphology, and Refining Effect of In-Situ NdB6-Al11Nd3/Al Inoculants
Authors: Jinhua Ding
Cheng Lu
Chunxiang Cui
Yijiao Sun
Jing Ding
Publication date: 24-09-2021
Publisher: Springer US
Published in: Journal of Materials Engineering and Performance / Issue 2/2022
Print ISSN: 1059-9495
Electronic ISSN: 1544-1024
DOI: https://doi.org/10.1007/s11665-021-06261-7

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