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    Volume 49, Issue 6 (September 2020)

    Microstructure Evolution of Peak-Aged ZK60 Magnesium Alloy under High Strain Rate Deformation

    (Received 24 April 2020; accepted 21 July 2020)

    Published Online: 15 September 2020

    CODEN: JTEVAB

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    Abstract

    The microstructure evolution of peak-aged ZK60 magnesium alloy under high strain rate deformation was studied by the radial collapse of a thick-walled cylinder technique and transmission electron microscope. The results showed that the rod-like β1 phase was the main precipitated phase in the peak-aged ZK60 magnesium alloy, and precipitate-free regions were present along the grain boundaries. A large number of twins and dislocations were produced in the sample within 4.0 μs after high strain rate loading, and a number of thin and long rod-like β1 phases were observed within the dislocated tangle of the deformed sample. The length and diameter of the rod-like phases in the samples were gradually reduced, and some of the rod-like phases were converted into spherical phases with increasing strain rate, which indicated that the original precipitated phases were partly dissolved after high strain rate loading. The microhardness of the samples increased from HV80.12 to HV101.20 as the strain rate increased.

    Author Information:

    Yang, Yang
    School of Materials Science and Engineering, Central South UniversityKey Laboratory of Nonferrous Metals, Ministry of Education, Changsha CityChangsha, Hunan Province

    Yang, Shuangjun
    School of Materials Science and Engineering, Central South University, Changsha City, Hunan Province

    Wang, Zhen
    School of Materials Science and Engineering, Central South University, Changsha City, Hunan Province


    Stock #: JTE20200272

    ISSN:0090-3973

    DOI: 10.1520/JTE20200272

    Author
    Title Microstructure Evolution of Peak-Aged ZK60 Magnesium Alloy under High Strain Rate Deformation
    Symposium ,
    Committee B07