何琼,许晓嫦,任鹏禾,禹灿,何浩鹏

• 1:中南大学材料科学与工程学院

摘要(Abstract)：

采用晶间腐蚀浸泡实验,研究了低温长时间加热的温度和时间对T4态6000系铝合金晶间腐蚀敏感性的影响,并通过透射电镜观察其基体和晶界析出相的特征,以研究其晶间腐蚀机理。结果表明:低温长时间加热时间一定时,随着加热温度的升高,铝合金的晶间腐蚀敏感性逐渐降低并有轻微点蚀;加热温度一定时,随着加热时间的延长,铝合金的腐蚀类型由晶间腐蚀转变为点蚀。195℃加热450 h后,铝合金析出相特征为基体弥散分布大量的β″相和Q'相,而晶界析出相呈现球状、断续分布且无沉淀析出带(PFZ)较宽,此时,合金的晶间腐蚀敏感性最低。

关键词(KeyWords)： 6000系铝合金;热处理;微观组织;晶间腐蚀

Abstract:

Keywords:

基金项目(Foundation): 国家重点基础研究发展规划(“973”计划)项目(2012CB619506)

作者(Author): 何琼,许晓嫦,任鹏禾,禹灿,何浩鹏

DOI: 10.13289/j.issn.1009-6264.2017-0077

参考文献(References)：

• [1]潘道召,王芝秀,李海,等.双级时效对6061铝合金拉伸性能和晶间腐蚀性能的影响[J].中国有色金属学报,2010,20(3):435-441.PAN Dao-zhao,WANG Zhi-xiu,LI Hai,et al.Effects of two-step ageing treatment on tensile properties and intergranular corrosion of 6061 aluminum alloy[J].The Chinese Journal of Nonferrous Metals,2010,20(3):435-441.
• [2]庄州生.飞机腐蚀:航空公司不容忽视的飞行安全隐患[N].中国民航报,2011年3月22日(次版).ZHUANG Zhou-sheng.Aircraft corrosion:Cannot be ignored flight safety hazard to airline[N].China Civil Aviation,March 22,2011(second edition).
• [3]Wang J M,Meng X D,Bai Y Y,et al.Effect of artificial aging on intergranular corrosion of 6063 Al alloy[J].Advanced Materials Research,2014(842):275-278.
• [4]Svenningsen G,Lein J E,Bjorgum A,et al.Effect of low copper content and heat treatment on intergranular corrosion of Al Mg Si(Cu)model alloy[J].Corrosion Science,2006,48(1):226-242.
• [5]邓伟林,冯可芹,王均,等.挤压比对6061铝合金耐腐蚀性能的影响[J].四川大学学报(工程科学版),2012,44(1):291-296.DENG Wei-lin,FENG Ke-qin,WANG Jun,et al.Effects of extrusion ratio on the corrosion resistance of 6061 aluminum alloy[J].Journal of Sichuan University,2012,44(1):291-296.
• [6]盛晓菲,杨文超,汪明朴,等.人工时效对6005A铝合金晶间腐蚀性能的影响[J].中国有色金属学报,2012,22(8):2174-2180.SHENG Xiao-fei,YANG Wen-chao,WANG Ming-pu,et al.Effect of artificial ageing on intergranular corrosion of 6005A Al alloy[J].The Chinese Journal of Nonferrous Metals,2012,22(8):2174-2180.
• [7]李祥亮,陈江华,刘春辉,等.T6和T78时效工艺对Al-Mg-Si-Cu合金显微结构和性能的影响[J].金属学报,2013,49(2):243-249.LI Xiang-liang,CHEN Jiang-hua,LIU Chun-hui,et al.Effects of T6 and T78 tempers on the microstructure and properties of Al-Mg-Si-Cu alloys[J].Acta Metallurgica Sinica,2013,49(2):243-249.
• [8]Braun R.Effect of thermal exposure on the microstructure,tensile properties and the corrosion behavior of 6061 aluminum alloy sheet[J].Materials and Corrosion,2005,56(3):159-165.
• [9]何健伟,王祝堂.船舶舰艇用铝及铝合金(2)[J].轻合金加工技术,2015,43(9):1-12HE Jian-wei,WANG Zhu-tang.Aluminum and its alloys for ships and naval vessels(2)[J].Light Alloy Fabrication Technology,2015,43(9):1-12.
• [10]Chen J H,Costan E,van Huis M A,et al.Atomic Pillar-based nanoprecipitates strengthen Al Mg Si alloys[J].Science,2006,312(5772):416-419.
• [11]Buha J,Lumley R N,Crosky A G,et al.Secondary precipitation in an Al-Mg-Si-Cu alloy[J].Acta Materialia,2007,55(9):3015-3024.
• [12]Ravi C,Wolverton C.First-principles study of crystal structure and stability of Al-Mg-Si(Cu)precipitates[J].Acta Materialia,2004,52(14):4213-4227.
• [13]Gaber A,Gaffar M A,Mostafa M S,et al.Precipitation kinetics of Al-1.12 Mg2Si-0.35 Si and Al-1.07 Mg2Si-0.33 Cu alloys[J].Journal of Alloys and Compounds,2007,429(1/2):167-175.
• [14]肖纪美,曹楚南.材料腐蚀学原理[M].北京:化学工业出版社,2002.
• [15]Braun R.Investigation on the long-term stability of 6013-T6 sheet[J].Materials Characterization,2006,56(2):85-95.
• [16]Braun R.Investigation on microstructure and corrosion behavior of 6xxx series aluminum alloys[J].Materials Science Forum,2006(519/521):735-740.

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