Quick Search:       Advanced Search
姚怀,文九巴,熊毅,贺俊光,刘亚.挤压温度对固溶态Mg-2.0Zn-0.5Zr-3.0Gd合金微观组织及耐腐蚀性能的影响[J].稀有金属材料与工程(英文),2019,48(6):1982~1989.[Yao Huai,Wen Jiuba,Xiong Yi,He Junguang and Liu Ya.Effect of the extrusion temperature on the microstructure and corrosion resistance of solution-treated Mg-2.0Zn-0.5Zr-3.0Gd alloy[J].Rare Metal Materials and Engineering,2019,48(6):1982~1989.]
Effect of the extrusion temperature on the microstructure and corrosion resistance of solution-treated Mg-2.0Zn-0.5Zr-3.0Gd alloy
Download Pdf  View/Add Comment  Download reader
Received:December 08, 2017  Revised:December 24, 2017
DOI:
Key words: magnesium alloys  microstructure  biocorrosion property  extrusion
Foundation item:河南省高校科技创新人才支持计划项目(项目号17HASTIT026);河南省科技攻关计划项目(项目号152102210077);河南省教育厅科技计划项目(项目号16A430005)
Author NameAffiliation
Yao Huai,Wen Jiuba,Xiong Yi,He Junguang and Liu Ya  
Hits: 14
Download times: 7
Abstract:
      Effects of the extrusion temperature on the microstructure of solution-treated Mg-2.0Zn-0.5Zr-3.0Gd alloys were investigated by the metallographic microscope, the scanning electron microscope and the transmission electron microscope. Moreover, the mass-loss measurement and electrochemical corrosion technique were used to investigatethe corrosion behaviors of the alloys in the simulated body fluid. The obtained results showed that the extruded alloys were composed of large deformation grains and dynamic recrystallization grains, while the precipitated phases consisted of nanoscale rod-like (Mg, Zn)3Gd and granular Mg2Zn11 phase.With an increase of the extrusion temperature in the range of 340 ℃ to 360 ℃, the volume fraction of dynamic recrystallized microstructure of the extruded alloys gradually raised, but the corrosion rates progressively decreased. When the extrusion temperature was 360 ℃, the alloy had a full dynamic recrystallization, and had a better corrosion resistance with a static corrosion rate of 0.527 mm/y, and behaved with a uniform corrosion. When the temperature increased to 380 ℃, a portion of the dynamic recrystallized grains grew abnormally, which resulted in an increase of the corrosion rate with increasing the extrusion temperature.