title: Extraordinary high ductility/strength of the interface designed bulk W-ZrC alloy plate at relatively low temperature.
abstract: The refractory tungsten alloys with high ductility/strength/plasticity are highly desirable for a wide range of critical applications. Here we report an interface design strategy that achieves 8.5 mm thick W-0.5 wt. %ZrC alloy plates with a flexural strength of 2.5 GPa and a strain of 3% at room temperature (RT) and ductile-to-brittle transition temperature of about 100 °C. The tensile strength is about 991 MPa at RT and 582 MPa at 500 °C, as well as total elongation is about 1.1% at RT and as large as 41% at 500 °C, respectively. In addition, the W-ZrC alloy plate can sustain 3.3 MJ/m(2) thermal load without any cracks. This processing route offers the special coherent interfaces of grain/phase boundaries (GB/PBs) and the diminishing O impurity at GBs, which significantly strengthens GB/PBs and thereby enhances the ductility/strength/plasticity of W alloy. The design thought can be used in the future to prepare new alloys with higher ductility/strength.
authors.affiliation: Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China.|University of Science and Technology of China, Hefei 230026, China.
authors.forename: Z M
authors.initials: ZM
authors.lastname: Xie
authors.affiliation: Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China.|University of Science and Technology of China, Hefei 230026, China.
authors.forename: R
authors.initials: R
authors.lastname: Liu
authors.affiliation: Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China.|University of Science and Technology of China, Hefei 230026, China.
authors.forename: S
authors.initials: S
authors.lastname: Miao
authors.affiliation: Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China.|University of Science and Technology of China, Hefei 230026, China.
authors.forename: X D
authors.initials: XD
authors.lastname: Yang
authors.affiliation: Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China.|University of Science and Technology of China, Hefei 230026, China.
authors.forename: T
authors.initials: T
authors.lastname: Zhang
authors.affiliation: Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China.|University of Science and Technology of China, Hefei 230026, China.
authors.forename: X P
authors.initials: XP
authors.lastname: Wang
authors.affiliation: Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China.|University of Science and Technology of China, Hefei 230026, China.
authors.forename: Q F
authors.initials: QF
authors.lastname: Fang
authors.affiliation: Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China.|University of Science and Technology of China, Hefei 230026, China.
authors.forename: C S
authors.initials: CS
authors.lastname: Liu
authors.affiliation: Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China.
authors.forename: G N
authors.initials: GN
authors.lastname: Luo
authors.affiliation: Southwestern Institute of Physics, Chengdu, China.
authors.forename: Y Y
authors.initials: YY
authors.lastname: Lian
authors.affiliation: Southwestern Institute of Physics, Chengdu, China.
authors.forename: X
authors.initials: X
authors.lastname: Liu