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10.3390/ma12233933
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Article

Densification Mechanism for the Precursor of AFS under Different Rolling Temperatures

by
Xi Sun
1,2,
Peng Huang
1,2,
Xiaoguang Zhang
1,2,
Nanding Han
1,2,
Jinqin Lei
3,
Yongtao Yao
4 and
Guoyin Zu
1,2,*
1
School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China
2
Key Laboratory of Lightweight Structural Materials, Liaoning province, Shenyang 110819, China
3
Northeast Light Alloy Co., Ltd., Harbin 150060, China
4
National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin 150001, China
*
Author to whom correspondence should be addressed.
Materials 2019, 12(23), 3933; https://doi.org/10.3390/ma12233933
Submission received: 1 November 2019 / Revised: 22 November 2019 / Accepted: 23 November 2019 / Published: 27 November 2019
(This article belongs to the Section Porous Materials)
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Abstract

The effect of rolling temperature on the precursor of aluminum foam sandwich (AFS) prepared by powder metallurgy through Pack Rolling method is investigated in this work. The cross-section along rolling direction of the precursors was observed. It was found that periodic corrugated morphology with micro-cracks on the composite interface as well as cracks and micro-holes among core powder particles emerged abundantly at room temperature rolling. These defects degraded with increasing rolling temperature and completely disappeared when the rolling temperature reached 400 °C. Combining with foaming ability of these precursors, the densification mechanism of core powders was discussed. Powder particles deformed with difficulty at low rolling temperature; the gap between them cannot be effectively filled through their plastic deformation. Fracture occurred in powder core layer during co-extension with the outer panel and was partly embedded by it, resulting in corrugated composite morphology at the interface. The precursors of high density and excellent bonding interface were prepared at the rolling temperature of 400 °C. A more suitable foaming condition was determined.
Keywords: aluminum foam sandwich; pack rolling; densification mechanism; composite interface morphology aluminum foam sandwich; pack rolling; densification mechanism; composite interface morphology

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MDPI and ACS Style

Sun, X.; Huang, P.; Zhang, X.; Han, N.; Lei, J.; Yao, Y.; Zu, G. Densification Mechanism for the Precursor of AFS under Different Rolling Temperatures. Materials 2019, 12, 3933. https://doi.org/10.3390/ma12233933

AMA Style

Sun X, Huang P, Zhang X, Han N, Lei J, Yao Y, Zu G. Densification Mechanism for the Precursor of AFS under Different Rolling Temperatures. Materials. 2019; 12(23):3933. https://doi.org/10.3390/ma12233933

Chicago/Turabian Style

Sun, Xi, Peng Huang, Xiaoguang Zhang, Nanding Han, Jinqin Lei, Yongtao Yao, and Guoyin Zu. 2019. "Densification Mechanism for the Precursor of AFS under Different Rolling Temperatures" Materials 12, no. 23: 3933. https://doi.org/10.3390/ma12233933

APA Style

Sun, X., Huang, P., Zhang, X., Han, N., Lei, J., Yao, Y., & Zu, G. (2019). Densification Mechanism for the Precursor of AFS under Different Rolling Temperatures. Materials, 12(23), 3933. https://doi.org/10.3390/ma12233933

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