Microstructure, mechanical and biodegradable properties of a Mg–2Zn–1Gd–0.5Zr alloy with different solution treatments
来源期刊：Rare Metals2019年第6期
论文作者：Jun-Xiu Chen Ming Gao Li-Li Tan Ke Yang
文章页码：532 - 542
摘 要：Solution treatment is a useful way to improve the degradation resistance of Mg alloys.In this work,effects of solution treatment temperature on mechanical and biodegradable properties of an extruded Mg–2Zn–1Gd–0.5Zr alloy were studied.Microstructure analysis,tensile test, three-point bending test, immersion test and electrochemical test were performed.The results showed that increasing solution temperature decreases the mechanical properties of the alloy.However, three-point bending test revealed that the solution-treated alloy at 510 ℃ could maintain 95% of its maximum bending force(Fmax) during the 28-day immersion period.After treatment at 510 ℃ for 5 h, all the second phases were dissolved into the alloy, the galvanic corrosion was inhibited, and the alloy exhibited good corrosion resistance with a corrosion rate of 0.35 mm·year-1 in Hank’s solution.
Jun-Xiu Chen1,2，Ming Gao1,2，Li-Li Tan1，Ke Yang1
1. Institute of Metal Research, Chinese Academy of Sciences2. School of Materials Science and Engineering, University of Science and Technology of China
摘 要：Solution treatment is a useful way to improve the degradation resistance of Mg alloys.In this work,effects of solution treatment temperature on mechanical and biodegradable properties of an extruded Mg–2Zn–1Gd–0.5Zr alloy were studied.Microstructure analysis,tensile test, three-point bending test, immersion test and electrochemical test were performed.The results showed that increasing solution temperature decreases the mechanical properties of the alloy.However, three-point bending test revealed that the solution-treated alloy at 510 ℃ could maintain 95% of its maximum bending force(Fmax) during the 28-day immersion period.After treatment at 510 ℃ for 5 h, all the second phases were dissolved into the alloy, the galvanic corrosion was inhibited, and the alloy exhibited good corrosion resistance with a corrosion rate of 0.35 mm·year-1 in Hank’s solution.
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