期刊
MATERIALS
卷 15, 期 22, 页码 -出版社
MDPI
DOI: 10.3390/ma15227986
关键词
Mg-Bi-Ca alloy; hot deformation; constitutive model; dynamic recrystallization kinetics; microstructure; mechanical properties
类别
资金
- National Natural Science Foundation of China [52204407]
- Natural Science Foundation of Jiangsu Province [BK20220595]
- Postgraduate Research & Practice Innovation Program of Jiangsu Province [SJCX22_1720]
- Innovative Science and Technology Platform Project of Cooperation between Yangzhou City and Yangzhou University, China [YZ2020266]
The flow behavior of the solution-treated Mg-3.2Bi-0.8Ca (BX31, wt.%) alloy during hot compression was systematically investigated. A strain-related Arrhenius constitutive model and dynamic recrystallization (DRX) kinetic model were established, and both models showed high predictability for flow curves and DRX behavior. Hot processing maps were used to determine suitable hot working conditions, and extrusion parameters of 573 K and 0.5 mm/s were selected. The as-extruded alloy exhibited a smooth surface, fine DRX structure with weak off-basal texture, and good strength-ductility synergy.
The flow behavior of the solution-treated Mg-3.2Bi-0.8Ca (BX31, wt.%) alloy was systematically investigated during hot compression at different deformation conditions. In the present study, the strain-related Arrhenius constitutive model and dynamic recrystallization (DRX) kinetic model were established, and the results showed that both two models had high predictability for the flow curves and the DRX behavior during hot compression. In addition, the hot processing maps were also made to confirm a suitable hot working range. Under the assistance of a hot processing map, the extrusion parameters were selected as 573 K and 0.5 mm/s. After extrusion, the as-extruded alloy exhibited a smooth surface, a fine DRX structure with weak off-basal texture and good strength-ductility synergy. The newly developed strong and ductile BX31 alloy will be helpful for enriching low-cost, high-performance wrought Mg alloy series for extensive applications in industries.
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