杨淼,刘耀辉,金宏哲,宋雨来

• 1:吉林大学汽车材料教育部重点实验室材料科学与工程学院
• 2:北华大学工程训练中心

摘要(Abstract)：

研究了铸造AM50镁合金固溶处理后的组织及腐蚀力学性能的变化规律。结果表明,固溶处理后,由于大量Al固溶进α-Mg中,AM50镁合金相组成主要为α-Mg固溶体。此外,固溶处理没有改变AM50镁合金的断裂机制,仍为准解理断裂。受最大蚀坑深度和固溶强化理论影响,在腐蚀时间为24 h前,镁合金固溶处理后的腐蚀剩余强度高于铸态;而在72 h至336 h之间,固溶处理后的镁合金剩余强度低于铸态;在432 h时,固溶处理后的合金剩余强度重新高于铸态合金。铸态和固溶处理后AM50镁合金的腐蚀速率均呈现出先大后小的规律,这种现象主要由镁合金在NaCl溶液中的腐蚀原理决定的。

关键词(KeyWords)： 固溶处理;镁合金;腐蚀剩余强度

Abstract:

Keywords:

基金项目(Foundation): 吉林省科技发展计划项目(201201032)

作者(Author): 杨淼,刘耀辉,金宏哲,宋雨来

DOI: 10.13289/j.issn.1009-6264.2012.07.020

参考文献(References)：

• [1]Zhu X,Yang H,Lei M.Corrosion resistance of Al ion implanted AZ31 magnesium alloy at elevated temperature[J].Surface and CoatingsTechnology,2007,201(15):6663-6666.
• [2]Song R,Blawert C,Dietzel W,et al.A study on stress corrosion cracking and hydrogen embrittlement of AZ31 magnesium alloy[J].MaterialsScience and Engineering,A,2005,399(1-2):308-317.
• [3]Ballerini G,Bardi U,Bignucolo R,et al.About some corrosion mechanisms of AZ91D magnesium alloy[J].Corrosion Science,2005,47(9):2173-2184.
• [4]Li L,Cheng Y,Wang H,et al.Anodization of AZ91 magnesium alloy in alkaline solution containing silicate and corrosion properties of anodizedfilms[J].Transactions of Nonferrous Metals Society of China,2008,18(3):722-727.
• [5]陈先华,王敬丰,汤爱涛,等.杂质元素对镁合金组织与性能的影响及其对应措施[J].材料导报,2010,24(2):37-41.Chen Xian-hua,Wang Jing-feng,Tang Ai-tao,et al.Impurity effect on microstructure and properties of magnesium alloys and neutralizing methods[J].Material Review,2010,24(2):37-41.
• [6]Ishizaki T,Shigematsu I,Saito N.Anticorrosive magnesium phosphate coating on AZ31 magnesium alloy[J].Surface and Coatings Technology,2009,203(16):2288-2291.
• [7]Wang Q,Liu Y,Zhu X,et al.Study on the effect of corrosion on the tensile properties of the 1.0wt.%Yttrium modified AZ91 magnesium alloy[J].Materials Science and Engineering A,2009,517(1-2):239-245.
• [8]苏鸿英.镁合金的应用前景和局限性[J].世界有色金属,2011(2):69.Su Hong-ying.The application prospects and limitations of magnesium alloys[J].World Nonferrous Metals,2011(2):69.
• [9]Li C,Liu Y,Wang Q,et al.Study on the corrosion residual strength of the 1.0wt%Ce modified AZ91 magnesium alloy[J].MaterialsCharacterization,2010,61(1):123-127.
• [10]Yang L,Wei Y,Hou L,et al.Corrosion behaviour of die-cast AZ91D magnesium alloy in aqueous sulphate solutions[J].Corrosion Science,2010,52(2):345-351.
• [11]Chen J,Wang J,Han E,et al.States and transport of hydrogen in the corrosion process of an AZ91 magnesium alloy in aqueous solution[J].Corrosion Science,2008,50(5):1292-1305.

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