Journal Published Online: 15 September 2020
Volume 49, Issue 6

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

CODEN: JTEVAB

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
Key Laboratory of Nonferrous Metals, Ministry of Education, Changsha, Hunan Province, China
Yang, Shuangjun
School of Materials Science and Engineering, Central South University, Changsha City, Hunan Province, China
Wang, Zhen
School of Materials Science and Engineering, Central South University, Changsha City, Hunan Province, China
Pages: 10
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Stock #: JTE20200272
ISSN: 0090-3973
DOI: 10.1520/JTE20200272