析出相演变对2060-T8铝合金搅拌摩擦焊接头腐蚀行为的影响（英文）
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摘要
采用搅拌摩擦焊对2060-T8铝合金板材进行焊接,研究析出相演变对接头显微组织和腐蚀行为的影响。在采用扫描电镜和透射电镜表征2060-T8铝合金搅拌摩擦焊接头上表面析出相演变行为的基础上,通过电化学试验和交变盐雾腐蚀试验研究接头各区域的腐蚀行为。研究表明,腐蚀行为与各区析出相的特性密切相关,由于θ′(Al_2Cu)相、T1(Al_2CuLi)相和δ′(Al_3Li)相的回溶,以及晶界相和无沉淀析出带的出现,轴肩影响区是腐蚀最敏感的区域;因为不存在晶界析出相,相比轴肩影响区,热机械影响区的抗腐蚀性能略有提高;热影响区和母材的抗腐蚀性能最好。
Friction stir welding was used to join two AA2060-T8 plates, and then the effect of precipitate evolution on microstructure and corrosion behavior of the joint was investigated. The evolution of precipitates on the top surface of the joint was characterized by scanning electron microscopy and transmission electron microscopy. The corrosion behaviors of different regions in the joint were investigated by an electrochemistry method and an alternating salt spray exposure. The corrosion was mainly dependent on the nature of precipitates in each region of the joint. The shoulder affected zone had the worst corrosion resistance as a result of the re-dissolved of θ′(Al_2Cu), T_1(Al_2CuLi) and δ′(Al_3Li) phases, the formation of intergranular precipitates and precipitate-free zones. However, the thermomechanically affected zone had a slightly improved corrosion resistance because it had no intergranular precipitates. The heat affected zone and base metal had the best corrosion resistance.
Friction stir welding was used to join two AA2060-T8 plates, and then the effect of precipitate evolution on microstructure and corrosion behavior of the joint was investigated. The evolution of precipitates on the top surface of the joint was characterized by scanning electron microscopy and transmission electron microscopy. The corrosion behaviors of different regions in the joint were investigated by an electrochemistry method and an alternating salt spray exposure. The corrosion was mainly dependent on the nature of precipitates in each region of the joint. The shoulder affected zone had the worst corrosion resistance as a result of the re-dissolved of θ′(Al_2Cu), T_1(Al_2CuLi) and δ′(Al_3Li) phases, the formation of intergranular precipitates and precipitate-free zones. However, the thermomechanically affected zone had a slightly improved corrosion resistance because it had no intergranular precipitates. The heat affected zone and base metal had the best corrosion resistance.
引文
[1]ZHANG X Y,YANG W X,XIAO R S.Microstructure and mechanical properties of laser beam welded Al-Li alloy 2060 with Al-Mg filler wire[J].Materials&Design,2015,88:446-450.
[2]DE P S,MISHRA R S,BAUMANN J A.Characterization of high cycle fatigue behavior of a new generation aluminum lithium alloy[J].Acta Materialia,2011,59(15):5946-5960.
[3]LIU H J,HU Y Y,DOU C,SEKULIC D P.An effect of the rotation speed on microstructure and mechanical properties of the friction stir welded 2060-T8 Al-Li alloy[J].Materials Characterization,2017,123(1):9-19.
[4]LI Q,WU A P,LI Y J,WANG G Q,QI B J,YAN D Y,XIONG L Y.Segregation in fusion weld of 2219 aluminum alloy and its influence on mechanical properties of weld[J].Transactions of Nonferrous Metals Society of China,2017,27(2):258-271.
[5]ZHANG Q Z,GONG W B,LIU W.Microstructure and mechanical properties of dissimilar Al-Cu joints by friction stir welding[J].Transactions of Nonferrous Metals Society of China,2015,25(6):1779-1786.
[6]SHARMA N,KHAN Z A,SIDDIQUEE A N.Friction stir welding of aluminum to copper-An overview[J].Transactions of Nonferrous Metals Society of China,2017,27(10):2113-2136.
[7]YOSHIMURA R,KONNO T J,ABE E,HIRAGA K.Transmission electron microscopy study of the evolution of precipitates in aged Al-Li-Cu alloys:Theθ′and T1 phases[J].Acta Materialia,2003,51:4251-4266.
[8]KANG J,FENG Z C,FRANKEL G S,LI J C,ZUO G S,WU A P.Effect of precipitate evolution on the pitting corrosion of friction stir welded joints of an Al-Cu alloy[J].Corrosion,2016,72(6):719-731.
[9]XU W F,LIU J H.Microstructure evolution along thickness in double-side friction stir welded 7085 Al alloy[J].Transactions of Nonferrous Metals Society of China,2015,25(10):3212-3222.
[10]CHEN Y C,LIU H J,FENG J C.Friction stir welding of 2219-T6aluminum alloy[J].Transactions of Nonferrous Metals Society of China,2005,15(2):75-78.
[11]KANG J,FENG Z C,FRANKEL G S,HUANG I W,WANG G Q,WU A P.Friction stir welding of Al alloy 2219-T8:Part I-Evolution of precipitates and formation of abnormal Al2Cu agglomerates[J].Metallurgical and Materials Transactions A,2016,47(9):4553-4565.
[12]KANG J,FENG Z C,LI J C,FRANKEL G S,WANG G Q,WU A P.Friction stir welding of Al alloy 2219-T8:part II-Mechanical and corrosion properties[J].Metallurgical and Materials Transactions A,2016,47(9):4566-4577.
[13]MAHONEY M W,RHODES C G,FLINTOFF J G,BINGEL W H,SPURLING R A.Properties of friction-stir-welded 7075 T651aluminum[J].Metallurgical and Materials Transactions A,1998,29(7):1955-1964.
[14]DHANAPAL A,BOOPATHY S R,BALASUBRAMANIAN V.Corrosion behaviour of friction stir welded AZ61A magnesium alloy welds immersed in NaCl solutions[J].Transactions of Nonferrous Metals Society of China,2012,22(4):793-802.
[15]JAYARAJ R K,MALARVIZHI S,BALASUBRAMANIAN V.Electrochemical corrosion behaviour of stir zone of friction stir welded dissimilar joints of AA6061 aluminium-AZ31B magnesium alloys[J].Transactions of Nonferrous Metals Society of China,2017,27(10):2181-2192.
[16]SU J Q,NELSON T W,STERLING C J.Microstructure evolution during FSW/FSP of high strength aluminum alloys[J].Materials Science and Engineering A,2005,405(1-2):277-286.
[17]RHODES C G,MAHONEY M W,BINGEL W H,SPURLING R A,BAMPTON C C.Effects of FSW on microstructure of 7075aluminum[J].Scripta Materialia,1996,36(1):69-75.
[18]BOUSQUET E,POULON Q A,PUIGGALI M,DEVOS O,TOUZET M.Relationship between microstructure,microhardness and corrosion sensitivity of an AA 2024-T3 friction stir welded joint[J].Corrosion Science,2011,53(9):3026-3034.
[19]WADESON D A,ZHOU X,THOMPSON G E,SKELDON P,OOSTERKAMP L D,SANMANS G.Corrosion behaviour of friction stir welded AA7108 T79 aluminium alloy[J].Corrosion Science,2006,48(4):887-897.
[20]PAGLIA C S,BUCHHEIT R G.Microstructure,microchemistry and environmental cracking susceptibility of friction stir welded2219-T87[J].Materials Science and Engineering A,2006,429:107-114.
[21]SUTTON M A,YANG B C,REYNOLDS A P,TAYLOR R.Banded microstructure in 2024-T351 and 2524-T351 aluminum friction stir welds:Part II.Mechanical characterization[J].Materials Science and Engineering A,2004,364(1-2):66-74.
[22]JHA S C,JR T H S,DAYANANDA M A.Grain boundary precipitate free zones in Al-Li alloys[J].Acta Metallurgica,1987,35(2):473-482.
[23]GAO N,STARINK M J,DAVIN L,CEREZO A,WANG S C,GREGSON P J.Microstructure and precipitation in Al-Li-Cu-Mg-(Mn,Zr)alloys[J].Materials Science and Technology,2005,21(9):1010-1018.
[24]KANG J,LUAN G H,FU R D.Microstructures and mechanical properties of banded textures of friction stir welded 7075-T6aluminum alloy[J].Acta Metallurgica Sinica,2011,47(2):224-230.
[25]KANG J,FU R D,LUAN G H,DONG C L,HE M.In-situ investigation on the pitting corrosion behavior of friction stir welded joint of AA2024-T3 aluminium alloy[J].Corrosion Science,2010,52(2):620-626.
[26]FRANKEL G S.Pitting corrosion of metals:A review of the critical factors[J].Journal of the Electrochemical Society,1998,145(6):2186-2198.
[27]PANG J J,LIU F C,LIU J,TAN M J,BLACKWOOD D J.Friction stir processing of aluminium alloy AA7075:Microstructure,surface chemistry and corrosion resistance[J].Corrosion Science,2016,106(5):217-228.
[28]WANG D,NI D R,MA Z Y.Effect of pre-strain and two-step aging on microstructure and stress corrosion cracking of 7050 alloy[J].Materials Science and Engineering A,2008,494(1-2):360-366.
[2]DE P S,MISHRA R S,BAUMANN J A.Characterization of high cycle fatigue behavior of a new generation aluminum lithium alloy[J].Acta Materialia,2011,59(15):5946-5960.
[3]LIU H J,HU Y Y,DOU C,SEKULIC D P.An effect of the rotation speed on microstructure and mechanical properties of the friction stir welded 2060-T8 Al-Li alloy[J].Materials Characterization,2017,123(1):9-19.
[4]LI Q,WU A P,LI Y J,WANG G Q,QI B J,YAN D Y,XIONG L Y.Segregation in fusion weld of 2219 aluminum alloy and its influence on mechanical properties of weld[J].Transactions of Nonferrous Metals Society of China,2017,27(2):258-271.
[5]ZHANG Q Z,GONG W B,LIU W.Microstructure and mechanical properties of dissimilar Al-Cu joints by friction stir welding[J].Transactions of Nonferrous Metals Society of China,2015,25(6):1779-1786.
[6]SHARMA N,KHAN Z A,SIDDIQUEE A N.Friction stir welding of aluminum to copper-An overview[J].Transactions of Nonferrous Metals Society of China,2017,27(10):2113-2136.
[7]YOSHIMURA R,KONNO T J,ABE E,HIRAGA K.Transmission electron microscopy study of the evolution of precipitates in aged Al-Li-Cu alloys:Theθ′and T1 phases[J].Acta Materialia,2003,51:4251-4266.
[8]KANG J,FENG Z C,FRANKEL G S,LI J C,ZUO G S,WU A P.Effect of precipitate evolution on the pitting corrosion of friction stir welded joints of an Al-Cu alloy[J].Corrosion,2016,72(6):719-731.
[9]XU W F,LIU J H.Microstructure evolution along thickness in double-side friction stir welded 7085 Al alloy[J].Transactions of Nonferrous Metals Society of China,2015,25(10):3212-3222.
[10]CHEN Y C,LIU H J,FENG J C.Friction stir welding of 2219-T6aluminum alloy[J].Transactions of Nonferrous Metals Society of China,2005,15(2):75-78.
[11]KANG J,FENG Z C,FRANKEL G S,HUANG I W,WANG G Q,WU A P.Friction stir welding of Al alloy 2219-T8:Part I-Evolution of precipitates and formation of abnormal Al2Cu agglomerates[J].Metallurgical and Materials Transactions A,2016,47(9):4553-4565.
[12]KANG J,FENG Z C,LI J C,FRANKEL G S,WANG G Q,WU A P.Friction stir welding of Al alloy 2219-T8:part II-Mechanical and corrosion properties[J].Metallurgical and Materials Transactions A,2016,47(9):4566-4577.
[13]MAHONEY M W,RHODES C G,FLINTOFF J G,BINGEL W H,SPURLING R A.Properties of friction-stir-welded 7075 T651aluminum[J].Metallurgical and Materials Transactions A,1998,29(7):1955-1964.
[14]DHANAPAL A,BOOPATHY S R,BALASUBRAMANIAN V.Corrosion behaviour of friction stir welded AZ61A magnesium alloy welds immersed in NaCl solutions[J].Transactions of Nonferrous Metals Society of China,2012,22(4):793-802.
[15]JAYARAJ R K,MALARVIZHI S,BALASUBRAMANIAN V.Electrochemical corrosion behaviour of stir zone of friction stir welded dissimilar joints of AA6061 aluminium-AZ31B magnesium alloys[J].Transactions of Nonferrous Metals Society of China,2017,27(10):2181-2192.
[16]SU J Q,NELSON T W,STERLING C J.Microstructure evolution during FSW/FSP of high strength aluminum alloys[J].Materials Science and Engineering A,2005,405(1-2):277-286.
[17]RHODES C G,MAHONEY M W,BINGEL W H,SPURLING R A,BAMPTON C C.Effects of FSW on microstructure of 7075aluminum[J].Scripta Materialia,1996,36(1):69-75.
[18]BOUSQUET E,POULON Q A,PUIGGALI M,DEVOS O,TOUZET M.Relationship between microstructure,microhardness and corrosion sensitivity of an AA 2024-T3 friction stir welded joint[J].Corrosion Science,2011,53(9):3026-3034.
[19]WADESON D A,ZHOU X,THOMPSON G E,SKELDON P,OOSTERKAMP L D,SANMANS G.Corrosion behaviour of friction stir welded AA7108 T79 aluminium alloy[J].Corrosion Science,2006,48(4):887-897.
[20]PAGLIA C S,BUCHHEIT R G.Microstructure,microchemistry and environmental cracking susceptibility of friction stir welded2219-T87[J].Materials Science and Engineering A,2006,429:107-114.
[21]SUTTON M A,YANG B C,REYNOLDS A P,TAYLOR R.Banded microstructure in 2024-T351 and 2524-T351 aluminum friction stir welds:Part II.Mechanical characterization[J].Materials Science and Engineering A,2004,364(1-2):66-74.
[22]JHA S C,JR T H S,DAYANANDA M A.Grain boundary precipitate free zones in Al-Li alloys[J].Acta Metallurgica,1987,35(2):473-482.
[23]GAO N,STARINK M J,DAVIN L,CEREZO A,WANG S C,GREGSON P J.Microstructure and precipitation in Al-Li-Cu-Mg-(Mn,Zr)alloys[J].Materials Science and Technology,2005,21(9):1010-1018.
[24]KANG J,LUAN G H,FU R D.Microstructures and mechanical properties of banded textures of friction stir welded 7075-T6aluminum alloy[J].Acta Metallurgica Sinica,2011,47(2):224-230.
[25]KANG J,FU R D,LUAN G H,DONG C L,HE M.In-situ investigation on the pitting corrosion behavior of friction stir welded joint of AA2024-T3 aluminium alloy[J].Corrosion Science,2010,52(2):620-626.
[26]FRANKEL G S.Pitting corrosion of metals:A review of the critical factors[J].Journal of the Electrochemical Society,1998,145(6):2186-2198.
[27]PANG J J,LIU F C,LIU J,TAN M J,BLACKWOOD D J.Friction stir processing of aluminium alloy AA7075:Microstructure,surface chemistry and corrosion resistance[J].Corrosion Science,2016,106(5):217-228.
[28]WANG D,NI D R,MA Z Y.Effect of pre-strain and two-step aging on microstructure and stress corrosion cracking of 7050 alloy[J].Materials Science and Engineering A,2008,494(1-2):360-366.
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