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Investigation of Microstructure Evolution and Phase Selection of Peritectic Cuce Alloy During High-Temperature Gradient Directional Solidification

Xu, Yiku; Huang, Zhaohao; Chen, Yongnan; Xiao, Junxia; Hao, Jianmin; Hou, Xianghui; Liu, Lin

Investigation of Microstructure Evolution and Phase Selection of Peritectic Cuce Alloy During High-Temperature Gradient Directional Solidification Thumbnail


Authors

Yiku Xu

Zhaohao Huang

Yongnan Chen

Junxia Xiao

Jianmin Hao

Xianghui Hou

Lin Liu



Abstract

In this work, a CuCe alloy was prepared using a directional solidification method at a series of withdrawal rates of 100, 25, 10, 8, and 5 ?m/s. We found that the primary phase microstructure transforms from cellular crystals to cellular peritectic coupled growth and eventually, changes into dendrites as the withdrawal rate increases. The phase constituents in the directionally solidified samples were confirmed to be Cu2Ce, CuCe, and CuCe + Ce eutectics. The primary dendrite spacing was significantly refined with an increasing withdrawal rate, resulting in higher compressive strength and strain. Moreover, the cellular peritectic coupled growth at 10 ?m/s further strengthened the alloy, with its compressive property reaching the maximum value of 266 MPa. Directional solidification was proven to be an impactful method to enhance the mechanical properties and produce well-aligned in situ composites in peritectic systems.

Citation

Xu, Y., Huang, Z., Chen, Y., Xiao, J., Hao, J., Hou, X., & Liu, L. (2020). Investigation of Microstructure Evolution and Phase Selection of Peritectic Cuce Alloy During High-Temperature Gradient Directional Solidification. Materials, 13(4), Article 911. https://doi.org/10.3390/ma13040911

Journal Article Type Article
Acceptance Date Feb 15, 2020
Online Publication Date Feb 19, 2020
Publication Date Feb 19, 2020
Deposit Date Feb 23, 2020
Publicly Available Date Mar 29, 2024
Journal Materials
Electronic ISSN 1996-1944
Publisher MDPI
Peer Reviewed Peer Reviewed
Volume 13
Issue 4
Article Number 911
DOI https://doi.org/10.3390/ma13040911
Keywords CuCe alloy; directional solidification; primary spacing; phase selection; cellular peritectic coupled growth
Public URL https://nottingham-repository.worktribe.com/output/4000649
Publisher URL https://www.mdpi.com/1996-1944/13/4/911

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