Microstructure, Hot Deformation Behavior, and Recrystallization Behavior of Zn-1Fe-1Mg Alloy under Isothermal Compression

Nowadays, wrought zinc-based biodegradable alloys are favored by researchers, due to their excellent mechanical properties and suitable degradation rates. However, there are few research studies on their thermal deformation behavior at present. This study took Zn-1Fe-1Mg and explored its microstruct...

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Bibliographic Details
Published in:Materials 2021-04, Vol.14 (7), p.1735
Main Authors: Xue, Penghao, Ma, Minglong, Li, Yongjun, Li, Xinggang, Yuan, Jiawei, Shi, Guoliang, Wang, Kaikun, Zhang, Kui
Format: Article
Language:English
Subjects:
Alloys
Biocompatibility
Biodegradability
Compressive strength
Constitutive models
Deformation
Dynamic recrystallization
Experiments
Grain size
Homogenization
Intermetallic compounds
Machinability
Mechanical properties
Microstructure
Process mapping
Spheroidizing
Stress-strain curves
Temperature
Thermal simulation
Zinc
Zinc base alloys
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Summary:Nowadays, wrought zinc-based biodegradable alloys are favored by researchers, due to their excellent mechanical properties and suitable degradation rates. However, there are few research studies on their thermal deformation behavior at present. This study took Zn-1Fe-1Mg and explored its microstructural change, deformation, recrystallization behavior and processing map by means of the thermal simulation experiment, at temperatures ranging from 235 °C to 340 °C and strain rates ranging from 10 s to 10 s . The constitutive model was constructed using the Arrhenius formula. The results indicated that the evolution of microstructure included the dynamic recrystallization (DRX) of the Zn matrix, the spheroidization of the Mg Zn phase, and breaking of the FeZn phase. The subgrains observed within the deformed grain resulted mainly from continuous dynamic recrystallization (CDRX). The precipitated FeZn grains overlapped with the precipitated MgZn from the matrix, thus forming a spine-like structure at the phase interface. After compression, the alloy possessed a strong basal texture. Affected by the change of Zn twins, textural strength decreased at first and then increased as the deformation temperature rose. There was only a small unstable region in the processing map, indicating that the alloy exhibited good machinability.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma14071735