摘要
A 5-layer laminated metal composite composed of ultrahigh-strength maraging steel and ductile 316L stainless steel was fabricated by hot pressing in vacuum and post-heat treatment.Microstructure characterization on hierarchical structure of the composite before and after heat treatment was made by optical microscopy,scanning electron microscopy and electron back-scattered diffraction technique,respectively.Meanwhile,the difference of mechanical performance on both sides of the interface was characterized by nano-hardness testing.Uniaxial tensile test showed that superior interfacial bonding was achieved due to the micro-‘bite’structure between the two steels without obvious defects or oxides at the interface and with coordinated deformation of the two components.Thus,a laminated metal composite consisting of two different constituents with extreme difference in strength can be well fabricated.
基金
This work was sponsored by Youth Innovation Promotion Association of Chinese Academy of Sciences(2017233)
National Natural Science Foundation of China(No.51472249)
Innovation Project of Institute of Metal Research(2015-ZD04)
National Natural Science Foundation of China Research Fund for International Young Scientists(No.51750110515).
