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Fine structure characterization of an explosively-welded gh3535/316h bimetallic plate interface

International Journal of Minerals,Metallurgy and Materials 2021年第11期28卷 1811-1820页

作者： Jia Xiao Ming Li Jian-ping Liang Li Jiang De-jun Wang Xiang-xi Ye Ze-zhong Chen Na-xiu Wang Zhi-jun Li School of Materials Science and Engineering University of Shanghai for Science and TechnologyShanghai 200093China Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China Dalian National Laboratory for Clean Energy Dalian 116023China Ministry of Ecology and Environment Beijing 100135China Institute of Zhejiang University-Quzhou Quzhou 324004China

An explosion-welded technology was induced to manufacture the gh3535/316h bimetallic plates to provide a more cost-effective structural material for ultrahigh temperature,molten salt thermal storage *** microstructure of the bonding interfaces were extensively investigated by scanning electron microscopy,energy dispersive spectrometry,and an electron probe *** bonding interface possessed a periodic,wavy morphology and was adorned by peninsula-or island-like transition *** higher magnification,a matrix recrystallization region,fine grain region,columnar grain region,equiaxed grain region,and shrinkage porosity were observed in the transition zones and surrounding *** backscattered diffraction demonstrated that the strain in the recrystallization region of the gh3535 matrix and transition zone was less than the *** concentration occurred at the interface and the solidification defects in the transition *** dislocation substructure in 316h near the interface was characterized by electron channeling contrast imaging.A dislocation network was formed in the grains of *** microhardness decreased as the distance from the welding interface increased and the lowest hardness was inside the transition zone.

关键词： gh3535/316h bimetallic plate ultrahigh temperature molten salt explosive welding interface structure dislocation substructure

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