Fabrication of Al/Mg/Al Composites via Accumulative Roll Bonding and Their Mechanical Properties

Jinfeng Nie; Mingxing Liu; Fang Wang; Yonghao Zhao; Yusheng Li; Yang Cao; Yuntian Zhu

doi:10.3390/ma9110951

Fabrication of Al/Mg/Al Composites via Accumulative Roll Bonding and Their Mechanical Properties

Materials (Basel). 2016 Nov 23;9(11):951. doi: 10.3390/ma9110951.

Authors

Jinfeng Nie¹, Mingxing Liu², Fang Wang³, Yonghao Zhao⁴, Yusheng Li⁵, Yang Cao⁶, Yuntian Zhu^{7

8}

Affiliations

¹ Nano Structural Materials Center, School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China. niejinfeng@njust.edu.cn.
² Nano Structural Materials Center, School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China. lmxshenlan@163.com.
³ Nano Structural Materials Center, School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China. xiaofengn@163.com.
⁴ Nano Structural Materials Center, School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China. yhzhao@njust.edu.cn.
⁵ Nano Structural Materials Center, School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China. liyusheng@njust.edu.cn.
⁶ Nano Structural Materials Center, School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China. cao_yang_leo@hotmail.com.
⁷ Nano Structural Materials Center, School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China. ytzhu@ncsu.edu.
⁸ Department of Materials Science and Engineering, North Carolina State University, Raleigh, NC 27695, USA. ytzhu@ncsu.edu.

Abstract

Al(1060)/Mg(AZ31)/Al(1060) multilayered composite was successfully produced using an accumulative roll bonding (ARB) process for up to four cycles at an elevated temperature (400 °C). The microstructure evolution of the composites and the bonding characteristics at the interfaces between Al and Mg layers with increasing ARB cycles were characterized through optical microscopy, field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM). It was found that the grains of Al and Mg layers were significantly refined and Al₃Mg₂ and Al₁₂ Mg₁₇ intermetallic compound layers formed at the Al/Mg bonding interfaces. The strength increased gradually and the ultimate tensile strength (UTS) reached a maximum value of about 240 MPa at the third pass. Furthermore, the strengthening mechanism of the composite was analyzed based on the fracture morphologies.

Keywords: AZ31 magnesium alloy; Al/Mg alloy multilayered composite; accumulative roll bonding (ARB); intermetallic compound; mechanical properties; microstructures.