Influence of hot rolling on the interface microstructure and mechanical properties of explosive welded Mg/Al composite p
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Xiaoqing Caoa) and Lifei Wang Shanxi Key Laboratory of Advanced Magnesium-Based Materials, Taiyuan 030024, China; Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China; and College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
Miao Cao Shanxi Key Laboratory of Advanced Magnesium-Based Materials, Taiyuan 030024, China; and College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
Wenxian Wang Shanxi Key Laboratory of Advanced Magnesium-Based Materials, Taiyuan 030024, China; Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China; and College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China (Received 17 October 2016; accepted 9 January 2017)
The influence of hot rolling on the evolution of the interface microstructure as well as mechanical properties of the Mg/Al explosive welding composite plates was investigated. The hardening phenomenon induced by explosive welding could be eliminated effectively through preheating treatment. An intermetallic compound layer consisting of Al3Mg2 and Mg17Al12 was observed at the Mg/Al interface after annealing at 400 °C. The composite plate then was hot rolled at 400 °C with different reduction ratios. The composite plates presented different degrees of warp and edge cracks with increasing the reduction ratio. At the reduction ratio of 30%, the coordination deformation ability of the constituent Mg and Al alloys is consistent with the composite plate. The results showed that the tensile strength and the elongation of the composite plates increased significantly after hot rolling owing to the dynamic recrystallization and the intermetallic compounds thickness decrease during hot rolling.
I. INTRODUCTION
A growing need is felt for the use of materials with special capabilities and characteristics, including high mechanical and thermal properties. A single material cannot satisfy these requirements. Therefore, due to their multifunctionality, hybrid materials have received increasing attention by various industries.1,2 Multilayered clad metal is a type of hybrid multilayered material that includes two or more dissimilar metallic alloys. These structures can make the materials have better comprehensive selective properties such as mechanical, thermal, and electromagnetic characteristics. Currently, various technologies of fabricating clad metals have been developed, such as diffusion bonding,3,4 hot rolling,5–7 resistance seam cladding,8 explosive bonding,9–12 and Contributing Editor: Jürgen Eckert a) Address all correspondence to this author. e-mail: [email protected] DOI: 10.1557/jmr.2017.27
fusion welding.13 Among them, the roll-bonding process and the explosive welding process are widely used. Explosive welding avoids the generation of intermetallic com
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