Journal
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
Volume 25, Issue 5, Pages 1974-1985Publisher
SPRINGER
DOI: 10.1007/s11665-016-2041-4
Keywords
bio-corrosion; corrosion residual strength; high strain rate rolling; microstructure; wrought magnesium alloy
Categories
Funding
- Natural Science Foundation Project of China [51571089]
- Hunan University [531107021095]
- National SIT Project
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Microstructure, bio-corrosion behavior, and corrosion residual strength in 0.9 wt.% NaCl solution of the fine-grained Mg-4Zn alloy sheet prepared by high strain rate rolling are systematically investigated. The as-rolled alloy has fine homogenous dynamic recrystallization grains with the average grain size of 4.5 mu m. It has different bio-corrosion behavior from the as-cast and is the most corrosion resistant except for pure Mg. Its in vitro strength loss is about 19% after 7 days immersion (the as-cast, 62%), and corrosion residual strength after 15 days immersion is 205 MPa. Its in vitro strength loss after 15, 30, and 60 days immersion are 24, 37, and 38% respectively. The as-rolled Mg-4Zn alloy is featured with the slighter in vitro loss of mechanical integrity due to uniform bio-corrosion and is desirable for the usage in the field of bone fixation.
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