title: Novel strip-cast Mg/Al clad sheets with excellent tensile and interfacial bonding properties.
abstract: In order to broaden industrial applications of Mg alloys, as lightest-weight metal alloys in practical uses, many efforts have been dedicated to manufacture various clad sheets which can complement inherent shortcomings of Mg alloys. Here, we present a new fabrication method of Mg/Al clad sheets by bonding thin Al alloy sheet on to Mg alloy melt during strip casting. In the as-strip-cast Mg/Al clad sheet, homogeneously distributed equi-axed dendrites existed in the Mg alloy side, and two types of thin reaction layers, i.e., γ (Mg17Al12) and β (Mg2Al3) phases, were formed along the Mg/Al interface. After post-treatments (homogenization, warm rolling, and annealing), the interfacial layers were deformed in a sawtooth shape by forming deformation bands in the Mg alloy and interfacial layers, which favorably led to dramatic improvement in tensile and interfacial bonding properties. This work presents new applications to multi-functional lightweight alloy sheets requiring excellent formability, surface quality, and corrosion resistance as well as tensile and interfacial bonding properties.
authors.affiliation: Center for Advanced Aerospace Materials, Pohang University of Science and Technology, Pohang, 790-784, South Korea.
authors.forename: Jung-Su
authors.initials: JS
authors.lastname: Kim
authors.affiliation: Center for Advanced Aerospace Materials, Pohang University of Science and Technology, Pohang, 790-784, South Korea.
authors.forename: Dong Ho
authors.initials: DH
authors.lastname: Lee
authors.affiliation: Center for Advanced Aerospace Materials, Pohang University of Science and Technology, Pohang, 790-784, South Korea.
authors.forename: Seung-Pill
authors.initials: SP
authors.lastname: Jung
authors.affiliation: Materials Deformation Department, Light Metal Division, Korea Institute of Materials Science, Changwon, 641-010, South Korea.
authors.forename: Kwang Seok
authors.initials: KS
authors.lastname: Lee
authors.affiliation: Center for Advanced Aerospace Materials, Pohang University of Science and Technology, Pohang, 790-784, South Korea.
authors.forename: Ki Jong
authors.initials: KJ
authors.lastname: Kim
authors.affiliation: Center for Advanced Aerospace Materials, Pohang University of Science and Technology, Pohang, 790-784, South Korea.
authors.forename: Hyoung Seop
authors.initials: HS
authors.lastname: Kim
authors.affiliation: Center for Advanced Aerospace Materials, Pohang University of Science and Technology, Pohang, 790-784, South Korea.
authors.forename: Byeong-Joo
authors.initials: BJ
authors.lastname: Lee
authors.affiliation: Graduate Institute of Ferrous Technology, Pohang University of Science and Technology, Pohang 790-784, South Korea.
authors.forename: Young Won
authors.initials: YW
authors.lastname: Chang
authors.affiliation: Global Technical Center, Steel Business Division, POSCO, Seoul 135-777, South Korea.
authors.forename: Junhan
authors.initials: J
authors.lastname: Yuh
authors.affiliation: Center for Advanced Aerospace Materials, Pohang University of Science and Technology, Pohang, 790-784, South Korea.
authors.forename: Sunghak
authors.initials: S
authors.lastname: Lee