为获得高强耐蚀的Mg-9Gd-4Y-1Nd-0.6Zr合金,采用光学显微镜、扫描电镜、透射电镜和电化学方法等分析了时效工艺对该合金强度和耐蚀性的影响.结果表明峰值时效合金强度很高但耐蚀性差,晶界析出相粗大且分布连续,在腐蚀溶液中镁合金由于析氢,晶界处很容易形成腐蚀通道.同时纳米尺寸的析出相和镁基体微电偶腐蚀很严重.过时效状态合金强度变化不大但耐蚀性显著增强,过时效样品晶内析出相粗大,晶界析出相分布不连续,腐蚀产物在其表面堆积导致腐蚀通道被堵塞,从而使合金耐蚀性显著提高.
参考文献
| [1] | C. Antion;P. Donnadieu;F. Perrard;A. Deschamps;C. Tassin;A. Pisch .Hardening precipitation in a Mg-4Y-3RE alloy[J].Acta materialia,2003(18):5335-5348. |
| [2] | 肖阳,张新明,陈健美,蒋浩,邓桢桢.高强耐热Mg-9Gd-4Y-0.6Zr合金的性能[J].中南大学学报（自然科学版）,2006(05):850-855. |
| [3] | XIAO Yang,ZHANG Xin-ming,CHEN Bu-xiang,DENG Zhen-zhen.Mechanical properties of Mg-9Gd-4Y-0.6Zr alloy[J].中国有色金属学会会刊（英文版）,2006(z3):1669-1672. |
| [4] | S.M. He;X.Q. Zeng;L.M. Peng .Precipitation in a Mg-10Gd-3Y-0.4Zr (wt. percent) alloy during isothermal ageing at 250 deg C[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2006(1/2):309-313. |
| [5] | P.J. Apps;H. Karimzadeh;J.F. King .Precipitation reactions in Magnesium-rare earth alloys containing Yttrium, Gadolinium or Dysprosium[J].Scripta materialia,2003(8):1023-1028. |
| [6] | Nie JF;Gao X;Zhu SM .Enhanced age hardening response and creep resistance of Mg-Gd alloys containing Zn[J].Scripta materialia,2005(9):1049-1053. |
| [7] | Xing-Wu Guo;Jian-Wei Chang;Shang-Ming He;Wen-Jiang Ding;Xishu Wang .Investigation of corrosion behaviors of Mg-6Gd-3Y-0.4Zr alloy in NaCl aqueous solutions[J].Electrochimica Acta,2007(7):2570-2579. |
| [8] | Jian-Wei Chang;Xing-Wu Guo;Peng-Huai Fu;Li-Ming Peng;Wen-Jiang Ding .Effect of heat treatment on corrosion and electrochemical behaviour of Mg-3Nd-0.2Zn-0.4Zr (wt.%) alloy[J].Electrochimica Acta,2007(9):3160-3167. |
| [9] | J.F. Nie .Effects of precipitate shape and orientation on dispersion strengthening in magnesium alloys[J].Scripta materialia,2003(8):1009-1015. |
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