刘 亚,文九巴,李 欢,姚 怀,贺俊光.固溶温度对Mg-Zn-Gd-Y-Zr生物可降解合金组织及性能影响[J].稀有金属材料与工程,2021,50(8):2850~2858.[Liu Ya,Wen Jiuba,Li Huan,Yao Huai,He Junguang.Effect of solution treatment on microstructure and properties of biodegradable Mg-Zn-Gd-Y-Zr magnesium alloy[J].Rare Metal Materials and Engineering,2021,50(8):2850~2858.]
固溶温度对Mg-Zn-Gd-Y-Zr生物可降解合金组织及性能影响
投稿时间:2020-08-24  修订日期:2020-09-21
中文关键词:  生物镁合金  微观组织  腐蚀  力学性能
基金项目:河南省高校科技创新人才支持计划项目(17HASTIT026);国家自然科学基金资助项目(U1804146);河南省高等学校重点科研项目(20A430010)
中文摘要:
      利用OM、SEM、TEM等手段研究了固溶处理对Mg-Zn-Gd-Y-Zr合金组织的影响,并对合金的耐腐蚀性能及力学性能进行了测试。结果表明:固溶处理有效改善铸态合金的组织不均匀性,在460-510 ℃温度范围固溶处理后,合金的晶粒尺寸随温度升高而逐渐增大,第二相尺寸减小并趋于球形。当固溶温度高于490 ℃时,有少量Zn2Zr3相析出,且随温度的升高,析出相有增多及粗化趋势。在490 ℃固溶8 h后,合金的组织均匀,耐蚀性相对较好,腐蚀较为均匀,失重腐蚀速率为0.472±0.048 mm/a,抗拉强度、屈服强度及延伸率分别为196.2±3.5 MPa、111.1±6.4 MPa和18.9±1.3%。试验研究了合金腐蚀后的力学性能,表明:490 ℃×8 h试样在模拟体液中浸泡后,力学性能在1-7天内急剧下降,7-14天下降较为缓慢,随浸泡时间的延长断裂形式从准解理断裂转变为脆性断裂。
Effect of solution treatment on microstructure and properties of biodegradable Mg-Zn-Gd-Y-Zr magnesium alloy
英文关键词:Biological magnesium alloy  Microstructure  Corrosion  Mechanical properties
英文摘要:
      The effect of solution treatment on the microstructure of Mg-Zn-Gf-Y-Zr alloy was studied by OM, SEM and TEM, and the corrosion resistance and mechanical properties of the alloy were tested. The results show that the solution treatment can effectively improve the inhomogeneity structure of the as-cast alloy. The grain size of the alloy increases with the increase of solution treatment temperature in the range of 460-510 ℃, and the second phase dissolves and tends to be spherical. When the solution temperature is greater than 490 ℃, a small amount of Zn2Zr3 phase is precipitated and the precipitation phase tends to increase and coarsening with the increase of temperature. The T4-490 sample exhibits uniform microstructure, good corrosion resistance and mechanical properties. The corrosion rate of the weight loss test is 0.472±0.048mm /a, and the tensile strength, yield strength and elongation were 196.2±3.5 MPa, 111.1±6.4 MPa and 18.9±1.3%, respectively. The tensile properties of T4-490 sample after immersed in SBF decreased sharply within 1-7 days, and decreased more slowly within 7-14 days. With the extension of soaking time, the fracture form changes from quasi cleavage fracture to brittle fracture.
作者单位E-mail
刘 亚 河南科技大学材料科学与工程学院 liuya_021@163.com 
文九巴 河南科技大学材料科学与工程学院  
李 欢 河南科技大学材料科学与工程学院  
姚 怀 河南科技大学材料科学与工程学院  
贺俊光 河南科技大学材料科学与工程学院  
摘要点击次数: 74
全文下载次数: 64
查看全文  查看/发表评论    HTML
关闭