Microstructure and corrosion behavior of Al-TiB2/TiC composites processed by hot rolling

Jinfeng Nie; Fang Wang; Yuyao Chen; Qingzhong Mao; Huabing Yang; Zhiwei Song; Xiangfa Liu; Yonghao Zhao

Results in Physics (Sep 2019)

Microstructure and corrosion behavior of Al-TiB2/TiC composites processed by hot rolling

Jinfeng Nie,
Fang Wang,
Yuyao Chen,
Qingzhong Mao,
Huabing Yang,
Zhiwei Song,
Xiangfa Liu,
Yonghao Zhao

Affiliations

Jinfeng Nie: Nano and Heterogeneous Materials Center, School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China; Corresponding authors.
Fang Wang: Nano and Heterogeneous Materials Center, School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
Yuyao Chen: Nano and Heterogeneous Materials Center, School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
Qingzhong Mao: Nano and Heterogeneous Materials Center, School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
Huabing Yang: Key Laboratory for Liquid–Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan 250061, China
Zhiwei Song: Nano and Heterogeneous Materials Center, School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
Xiangfa Liu: Key Laboratory for Liquid–Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan 250061, China
Yonghao Zhao: Nano and Heterogeneous Materials Center, School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China; Corresponding authors.

Journal volume & issue: Vol. 14

Abstract

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The microstructure and corrosion behavior of Al-5 wt.% TiB2/TiC composites after hot rolling treatment were investigated by scanning electron microscope, immersion tests, potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) in 3.5 wt.% NaCl solution. The results show that corrosion of α-Al phase initiates at the interfaces between the matrix and the agglomeration clusters of TiB2 and TiC particles. After hot rolling deformation, the dispersive distribution of reinforcement particles and the grain refinement of the Al matrix suppressed the rapid expansion of corrosion pits, which become smaller and shallower, indicating that the corrosion resistance of Al-TiB2/TiC composites has been enhanced by hot rolling treatment. Keywords: Al alloys, TiC, TiB2, Microstructure, Corrosion, Rolling

Published in Results in Physics

ISSN: 2211-3797 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Science: Physics
Website: http://www.journals.elsevier.com/results-in-physics/

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