Strain induced dynamic recrystallization nucleation of ZA21 magnesium alloy during compression process at low and medium temperatures | Zendy

Yanxia Niu | Zendy; Qichi Le | Zendy; Fangkun Ning | Zendy; Jian Hou | Zendy; Yonghui Jia | Zendy

Open Access

Strain induced dynamic recrystallization nucleation of ZA21 magnesium alloy during compression process at low and medium temperatures

Author(s) -

Yanxia Niu,

Qichi Le,

Fangkun Ning,

Jian Hou,

Yonghui Jia

Publication year - 2019

Publication title -

journal of materials research and technology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.832

H-Index - 44

eISSN - 2214-0697

pISSN - 2238-7854

DOI - 10.1016/j.jmrt.2019.10.063

Subject(s) - materials science , dynamic recrystallization , nucleation , magnesium alloy , grain boundary , recrystallization (geology) , metallurgy , alloy , grain boundary strengthening , grain size , composite material , strain rate , microstructure , hot working , thermodynamics , paleontology , physics , biology

Dynamic recrystallization (DRX) behavior of ZA21 magnesium alloy during compression process was investigated through uniaxial compression tests at 110 °C and 210 °C with an initial strain rate of 0.01 s−1. Based on OM and detailed TEM characterization, preferential nucleation position of DRX grains at different compression temperatures were identified. The DRX grains preferential nucleation position under the conditions of low and medium temperatures are in grains and at grain boundaries, respectively. This is mainly caused by the inconsistency between intragranular strength and grain boundary strength. Grain boundary strength is higher than the intragranular strength at low temperature. But the intragranular strength is higher than the grain boundary strength at medium temperature. This leads to a difference in the ability to resist deformation between them, so that the site of the DRX priority nucleation is different.

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