固溶前预变形对6013型铝合金晶粒取向和组织性能的影响
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摘要
采用光学显微镜、扫描电镜、电子背散射衍射技术、X射线衍射和室温力学性能测试、晶间腐蚀试验、剥落腐蚀试验等,研究了固溶前预变形对6013型铝合金晶粒取向和组织性能的影响。结果表明:预变形有利于减弱固溶处理后各晶面晶粒取向,预变形程度越高,晶粒取向减弱程度越大;预变形6013型铝合金固溶后,合金发生了再结晶,随着预变形量的增加,平均晶粒尺寸增加,位错密度降低,但合金的抗拉强度提高;预变形提高了6013型铝合金的腐蚀敏感性,固溶时效处理后发生了不同程度的晶间腐蚀和剥落腐蚀,晶间腐蚀最大深度和剥落腐蚀程度随预变形量的增加而提高。
Effect of pre-deformation before solid solution treatment on grain orientation,microstructure and properties of 6013 type aluminum alloy was investigated by optical microscopy( OM),scanning electron microscopy( SEM),electron backscattered diffraction( EBSD),Xray diffraction( XRD) and tensile testing at room temperature,intergranular corrosion testing,exfoliation corrosion testing. The results indicate that the grain orientation is weakened when the alloy is deformed before solid solution treatment,the weakening of grain orientation is increasing with increasing of pre-deformation; recrystallization occurs after solid solution treatment of pre-deformed 6013 type aluminum alloy,with the increase of pre-deformation,the average grain size increases,the dislocation density decreases,but the tensile strength of the alloy increases; the corrosion sensitivity of 6013 type aluminum alloy increases,the intergranular corrosion and exfoliation corrosion of predeformed 6013 type aluminum alloy occurs after solid solution and aging treatment,the maximum corrosion depth of intergranular corrosion and the degree of exfoliation corrosion increase with the increase of pre-deformation.
Effect of pre-deformation before solid solution treatment on grain orientation,microstructure and properties of 6013 type aluminum alloy was investigated by optical microscopy( OM),scanning electron microscopy( SEM),electron backscattered diffraction( EBSD),Xray diffraction( XRD) and tensile testing at room temperature,intergranular corrosion testing,exfoliation corrosion testing. The results indicate that the grain orientation is weakened when the alloy is deformed before solid solution treatment,the weakening of grain orientation is increasing with increasing of pre-deformation; recrystallization occurs after solid solution treatment of pre-deformed 6013 type aluminum alloy,with the increase of pre-deformation,the average grain size increases,the dislocation density decreases,but the tensile strength of the alloy increases; the corrosion sensitivity of 6013 type aluminum alloy increases,the intergranular corrosion and exfoliation corrosion of predeformed 6013 type aluminum alloy occurs after solid solution and aging treatment,the maximum corrosion depth of intergranular corrosion and the degree of exfoliation corrosion increase with the increase of pre-deformation.
引文
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[2]张新明,刘颖维,叶凌英,等.预变形对AA2195铝锂合金析出及晶粒细化的影响[J].中南大学学报(自然科学版),2009(2):375-382.Zhang Xinming,Liu Yingwei,Ye Lingying,et al.Effects of predeformation on precipitating behavior and grain refinement of AA2195Al-Li alloy[J].Journal of Central South University(Science and Technology),2009(2):375-382.
[3]李红英,张建飞,欧玲,等.时效处理对新型Al-Cu-Li合金组织与性能的影响[J].金属热处理,2007,32(3):48-52.Li Hongying,Zhang Jianfei,Ou Ling,et al.Effect of aging process on microstructures and mechanical properties of a new Al-Cu-Li alloy[J].Heat Treatment of Metals,2007,32(3):48-52.
[4]刘庆,姚宗勇,Godfrey A,等.中低应变量冷轧AA1050铝合金中晶粒取向与形变位错界面的演变[J].金属学报,2009(6):641-646.Liu Qing,Yao Zhongyong,Godfrey A,et al.Evolutions of grain orientation and dislocation boundary in AA1050 aluminum alloy during cold rolling from low to medium strains[J].Acta Metallurgica Sinica,2009(6):641-646.
[5]Derry C G,Robson J D.Characterisation and modelling of toughness in6013-T6 aerospace aluminium alloy friction stir welds[J].Materials Science and Engineering A,2008,490(1/2):328-334.
[6]Kaneko R S,Bakow L,Lee E W.Aluminum alloy 6013 sheet for new US navy aircraft[J].JOM,1990,42(5):16-18.
[7]Chaudhuri J,Tan V,Patni K,et al.Comparison of corrosion-fatigue properties of 6013 bare,Alclad 2024,and 2024 bare aluminum alloy sheet materials[J].Journal of Materials Engineering and Performance,1992(1):91-96.
[8]Liu Manping,Jiang Tinghui,Wang Jun,et al.Aging behavior and mechanical properties of 6013 aluminum alloy processed by severe plastic deformation[J].Transactions of Nonferrous Metals Society of China,2014(12):3858-3865.
[9]张福豹.6013型铝合金的微合金化与性能初步研究[D].镇江:江苏大学,2011.
[10]Abdala M R W S,Garcia De Blas J C,Barbosa C,et al.Thermoelectrical power analysis of precipitation in 6013 aluminum alloy[J].Materials Characterization,2008,59(3):271-277.
[11]何运斌,潘清林,覃银江,等.等通道角挤压制备细晶ZK60镁合金的组织与力学性能[J].中国有色金属学报,2010(12):2274-2282.He Yunbin,Pan Qinglin,Qin Yinjiang,et al.Microstructure and mechanical properties of ultra-fine grain ZK60 magnesium alloy processed by equal channel angular pressing[J].The Chinese Journal of Nonferrous Metals,2010(12):2274-2282.
[12]Youssef K M,Scattergood R O,Murty K L,et al.Nanocrystalline AlMg alloy with ultrahigh strength and good ductility[J].Scripta Materialia,2006,54(2):251-256.
[13]Xu X J,Shao H H,Gao J C,et al.Effect of Si C film on tensile properties of nanostructured Ti produced by compressive deformation at liquid-nitrogen temperature[J].Materials Science and Engineering A,2008,493(1):195-201.
[14]朱旭.大变形量下无取向硅钢形变和再结晶织构研究[D].沈阳:东北大学,2012.
[15]刘国权.晶粒尺寸分布对纯铁拉伸性能的影响[J].物理测试,1989(3):26-28.
[16]陈康华,陈送义,彭国胜,等.变形程度对7150铝合金再结晶及性能的影响[J].特种铸造及有色合金,2010(2):103-107.Chen Kanghua,Chen Songyi,Peng Guosheng,et al.Effects of deformation rate on recrystallization and properties of 7150 aluminum alloy[J].Special Casting and Nonferrous Alloys,2010(2):103-107.
[17]Minoda T,Yoshida H.Effect of grain boundary characteristics on intergranular corrosion resistance of 6061 aluminum alloy extrusion[J].Metallurgical and Materials Transactions A,2002,33(9):2891-2898.