Research progress on precipitation-free zone of aluminum alloy

doi:10.13251/j.issn.0254-6051.2021.01.029

Abstract

Abstract: Researches of precipitation-free zone (PFZ) in aluminum alloy over the past 50 years were reviewed and the main formation mechanism and influencing factors and the influence of PFZ on the properties (mainly mechanical properties and corrosion resistance) of the alloy were emphatically discussed.The different view points of the related theories of PFZ on the formation mechanism and properties of the alloy were systematically introduced.Finally,the difficulty and key research direction of PFZ in aluminum alloy were put forward.

Key words: aluminum, PFZ, formation mechanism, mechanical properties

CLC Number:

TG146

Liao Bin, Cao Lingfei, Wu Xiaodong. Research progress on precipitation-free zone of aluminum alloy[J]. Heat Treatment of Metals, 2021, 46(1): 154-160.

References

[1] 刘晓滕,申中宝,赵巍,等.预退火处理对6016铝合金汽车板T4P态组织和性能的影响[J].金属热处理,2019,44(7):56-61.
Liu Xiaoteng,Shen Zhongbao,Zhao Wei,et al.Effect of pre-annealing on microstructure and mechanical properties of 6016 aluminum alloy automobile body sheet in T4P state[J].Heat Treatment of Metals,2019,44(7):56-61.
[2] 王基月,徐莉萍.双级固溶处理对7075高强铝合金组织和性能的影响[J].金属热处理,2020,45(3):166-168.
Wang Jiyue,Xu Liping.Effect of two-stage solution treatment on microstructure and properties of 7075 high strength aluminum alloy[J].Heat Treatment of Metals,2020,45(3):166-168.
[3] Clark J B.Electron probe test of two theories of “denuded zone” formation in aged alloys[J].Acta Metallurgica,1964,12(10):1197-1201.
[4] Rosenbaum H S,Turnbull D.Metallographic investigation of precipitation of silicon from aluminum[J].Acta Metallurgica,1959,7(10):664-674.
[5] Unwin P N T,Lorimer G W,Nicholson R B.The origin of the grain boundary precipitate free zone[J].Acta Metallurgica,1969,17:1363-1377.
[6] Shastry C R,Judd G.An electron microprobe analysis of solute segregation near grain boundaries in an Al-Zn-Mg alloy[J].Metallurgical Transactions,1972,3(4):779-782.
[7] Chang S,Morral J E.Influence of quenching rate on precipitate-free-zongs in an Al-Zn-Mg alloy[J].Acta Metallurgica,1975,23(6):685-689.
[8] Sperry P R.Discussion of “Mechanism of formation of precipitate-free zones in an Al-4.7 pct Zn-3.9 pct Mg alloy[J].Metallurgical Transactions,1970,1(9):2650-2650.
[9] Jha S C,Sanders Jr T H,Dayananda M A.Grain boundary precipitate free zones in Al-Li alloys[J].Acta Metallurgica,1987,35(2):473-482.
[10] Yao D P,Zhang Y Z,Hu Z Q,et al.The formation and growth of PFZ at grain boundary in Al-11.9at.%Li alloy[J].Scripta Metallurgica,1989,23(4):537-541.
[11] Hiroshi Okuda,Ochiai Shojiro.The effects of solute and vacancy depletion on the formation of precipitation-free zone in a model binary alloy examined by a monte carlo simulation[J].Materials Transactions,2004,45(5):1455-1460.
[12] Embury J D,Nicholson R B.The nucleation of precipitates:The system Al-Zn-Mg[J].Acta Metallurgica,1965,13(4):403-417.
[13] Rosenbaum H S,Turnbull D.Metallographic investigation of precipitation of silicon from aluminum[J].Acta Metallurgica,1959,7(10):664-674.
[14] Lorimer G W,Nicholson R B.Further results on the nucleation of precipitates in the Al-Zn-Mg system[J].Acta Metallurgica,1966,14(8):1009-1013.
[15] Ogura Tomo,Hirosawa Shoichi,Cerezo Alfred,et al.Atom probe tomography of nanoscale microstructures within precipitate free zones in Al-Zn-Mg(-Ag) alloys[J].Acta Materialia,2010,58(17):5714-5723.
[16] Ogura Tomo,Hirosawa Shoichi,Akio Hirose,et al.Effects of microalloying tin and combined addition of silver and tin on the formation of precipitate free zones and mechanical properties in Al-Zn-Mg alloys[J].Materials Transactions,2011,52(5):900-905.
[17] Shastry C R,Judd G.A study of grain boundary precipitate-free zone formation in an Al-Zn-Mg alloy[J].Metallurgical and Materials Transactions B,1971,2(12):3283-3287.
[18] Dobson P S,Kritzinger S,Smallman R E,et al.Oxidation-vacancy production in aluminium alloys[J].Philosophical Magazine,1968,17(148):769-779.
[19] Raghavan M.Microanalysis of precipitate free zones (PFZ) in Al-Zn-Mg and Cu-Ni-Nb alloys[J].Metallurgical Transactions A,1980,11(6):993-999.
[20] Sha G,Yao L,Liao X,et al.Segregation of solute elements at grain boundaries in an ultrafine grained Al-Zn-Mg-Cu alloy[J].Ultramicroscopy,2011,111(6):500-505.
[21] Tolley A,Mitlin D,Radmilovic V,et al.Transmission electron microscopy analysis of grain boundary precipitate-free-zones (PFZs) in an AlCuSiGe alloy[J].Materials Science and Engineering:A,2005,412(1-2):204-213.
[22] Hirosawa Shoichi,Oguri Yoshifumi,Sato Tatsuo.Experimental and computational investigation of formation of precipitate free zones in an Al-Cu Alloy[J].Materials Transactions,2005,46(6):1230-1234.
[23] Chen Y Q,Yi D Q,Jiang Y,et al.Concurrent formation of two different type precipitation-free zones during the initial stage of homogenization[J].Philosophical Magazine,2013,93(18):2269-2278.
[24] Chen Y Q,Pan S P,Tang S W,et al.Formation mechanisms and evolution of precipitate-free zones at grain boundaries in an Al-Cu-Mg-Mn alloy during homogenisation[J].Journal of Materials Science,2016,51(16):7780-7792.
[25] Zhang Xiaolong,Zhang Liang,Wu Guohua,et al.Influences of Mg content on the microstructures and mechanical properties of cast Al-2Li-2Cu-0.2Zr alloy[J].Journal of Materials Science,2018,54(1):791-811.
[26] Nie Zuoren,Haung Hui,Gao Kunyuan,et al.The effect of erbium on the properties and microstructure of Al alloys[J].Materials Science Forum,2012,706-709:329-334.
[27] Song Fengxuan,Zhang Xinming,Liu Shengdan,et al.The effect of quench rate and overageing temper on the corrosion behaviour of AA7050[J].Corrosion Science,2014,78:276-286.
[28] Yu Xinxiang,Yin Dengfeng,Yu Zhiming,et al.Mechanism of enhanced fracture toughness in a novel Al-Cu-Li-Ce alloy[J].Rare Metal Materials and Engineering,2014,43(5):1061-1066.
[29] Su Ruiming,Qu Yingdong,You Junhua,et al.Effect of pre-aging on stress corrosion cracking of spray-formed 7075 alloy in retrogression and re-aging[J].Journal of Materials Engineering and Performance,2015,24(11):4328-4332.
[30] Li Zhaoming,Jiang Haichang,Yan Desheng,et al.Influence of scandium addition on stress corrosion cracking susceptibility of Al-Zn-Mg alloy in different corrosive environments[J].Metals,2018,8(4).
[31] Lu Yalin,Wang Jian,Li Xingcheng,et al.Effects of pre-deformation on the microstructures and corrosion behavior of 2219 aluminum alloys[J].Materials Science and Engineering:A,2018,723:204-211.
[32] Yin Yuan,Luo Binghui,Jing Huibo,et al.Influences of quench cooling rate on microstructure and corrosion resistance of Al-Cu-Mg alloy based on the end-quenching test[J].Metallurgical and Materials Transactions B,2018,49(5):2241-2251.
[33] Ogura Tomo,Hirosawa Shoichi,Sato Tatsuo.Quantitative characterization of precipitate free zones in Al-Zn-Mg(-Ag) alloys by microchemical analysis and nanoindentation measurement[J].Science and Technology of Advanced Materials,2004,5(4):491-496.
[34] Cao Chceng,Zhang Di,Wang Xu,et al.Effects of Cu addition on the precipitation hardening response and intergranular corrosion of Al-5.2Mg-2.0Zn (wt.%) alloy[J].Materials Characterization,2016,122:177-182.
[35] Yang Youliang,Zhan Lihua,Ma Qiangqiang,et al.Effect of pre-deformation on creep age forming of AA2219 plate:Springback,microstructures and mechanical properties[J].Journal of Materials Processing Technology,2016,229:697-702.
[36] Zhang Ruijie,Liu Xiaoyan,Wang Zhaopeng,et al.Effects of interrupted aging on the intergranular corrosion behavior of Al-Cu-Mg-Ag heat-resistant alloy[J].World Journal of Engineering,2016,13(6):476-481.
[37] He Yaling,Wang Xiaomin,Hu Jie,et al.Effect of Cu content on exfoliation corrosion and electrochemical corrosion of A7N01 aluminum alloy in EXCO solution[J].International Journal of Modern Physics B,2017,31(16-19):1744005.
[38] Liu L L,Pan Q L,Wang X D,et al.The effects of aging treatments on mechanical property and corrosion behavior of spray formed 7055 aluminium alloy[J].Journal of Alloys and Compounds,2018,735:261-276.
[39] He Chuan,Luo Binghui,Zheng Yaya,et al.Effect of Sn on microstructure and corrosion behaviors of Al-Mg-Si alloys[J].Materials Characterization,2019,156.
[40] 李卫,陈康华,焦慧彬,等.微量Ge对7056铝合金组织和淬火敏感性的影响[J].材料工程,2019,47(3):123-130.
Li Wei,Chen Kanghua,Jiao Huibin,et al.Effect of trace germanium on microstructure and quenching sensitivity of 7056 aluminum alloy[J].Journal of Materials Engineering,2019,47(3):123-130.
[41] Wang Yingchen,Liu Maowen,Xiao Wenlong,et al.Effects of multi-stage aging treatments on the precipitation behavior and properties of 7136 aluminum alloy[J].Journal of Alloys and Compounds,2020,814.
[42] Xu Xuehong,Deng Yunlai,Chi Shuiqing,et al.Effect of interrupted ageing treatment on the mechanical properties and intergranular corrosion behavior of Al-Mg-Si alloys[J].Journal of Materials Research and Technology,2020,9(1):230-241.
[43] Li Zhaoming,Jiang Haichang,Wang Yunli,et al.Effect of minor Sc addition on microstructure and stress corrosion cracking behavior of medium strength Al-Zn-Mg alloy[J].Journal of Materials Science and Technology,2018,34(7):1172-1179.
[44] Yang Rongxian,Liu Zhiyi,Ying Puyou,et al.Multistage-aging process effect on formation of GP zones and mechanical properties in Al-Zn-Mg-Cu alloy[J].Transactions of Nonferrous Metals Society of China,2016,26(5):1183-1190.
[45] Zhan Xin,Tang Jianguo,Li Huizhong,et al.Effects of non-isothermal aging on mechanical properties,corrosion behavior and microstructures of Al-Cu-Mg-Si alloy[J].Journal of Alloys and Compounds,2020,819:152960.
[46] Dai Xiaoyuan,Xiong Chaoyu,Li Ni,et al.TTT and TTP diagrams of quenching sensitivity of Al-9.0Zn-2.5Mg-1.5Cu-0.15Zr-0.2Sc alloy[J].Rare Metal Materials and Engineering,2019,48(3):721-727.
[47] Ji Ye,Pan Qinglin,Huang Li,et al.Quench sensitivity of a 7A46 aluminum alloy[J].Jom,2019,71(6):2054-2062.
[48] Li Hai,Zhao Peipei,Wang Zhixiu,et al.The intergranular corrosion susceptibility of a heavily overaged Al-Mg-Si-Cu alloy[J].Corrosion Science,2016,107:113-122.
[49] Liang Wenjie,Pan Qinglin,He Yunbin,et al.Effect of aging on the mechanical properties and corrosion susceptibility of an Al-Cu-Li-Zr alloy containing Sc[J].Rare Metals,2008,27(2):146-152.
[50] Li H Y,Kang W,Lu X C.Effect of age-forming on microstructure,mechanical and corrosion properties of a novel Al-Li alloy[J].Journal of Alloys and Compounds,2015,640:210-218.
[51] Li Bo,Pan Qinglin,Chen Congping,et al.Effect of aging time on precipitation behavior,mechanical and corrosion properties of a novel Al-Zn-Mg-Sc-Zr alloy[J].Transactions of Nonferrous Metals Society of China,2016,26(9):2263-2275.
[52] Ryum N.The influence of a precipitate-free zone on the mechanical properties of an Al-Mg-Zn alloy[J].Acta Metallurgica,1968,16(3):327-332.
[53] Zhang Yidong,Jin Shenbao,Trimby Patrick W,et al.Dynamic precipitation,segregation and strengthening of an Al-Zn-Mg-Cu alloy (AA7075) processed by high-pressure torsion[J].Acta Materialia,2019,162:19-32.
[54] Hirosawa Shoichi,Cerezo Alfred.Quantitative correlation between strength,ductility and precipitate microstructures with PFZ in Al-Zn-Mg(-Ag,Cu) alloys[J].Materials Science Forum,2006,519-521:431-436.
[55] Ogura Tomo,Hirosawa S Choichi,Sato Tatsuo.Improvement of strength and ductility by controlling PFZ with microalloying elements in Al-Zn-Mg alloys[J].Materials Science Forum,2007,561-565:235-238.
[56] Ogura Tomo,Hirose Akio,Sato Tatsuo.Effect of PFZand grain boundary precipitate on mechanical properties and fracture morphologies in Al-Zn-Mg(Ag) alloys[J].Materials Science Forum,2010,638-642:297-302.
[57] Liu Wenhui,Qiu Qun,Chen Yuqiang,et al.Simulation of PFZ on intergranular fracture based on XFEM and CPFEM[J].Journal of Central South University,2016,23(10):2500-2505.
[58] 刘瑛,张品芳,陈兰君,等.预析出对2519A铝合金局部腐蚀性能的影响[J].材料工程,2014,6:11-17.
Liu Ying,Zhang Pinfang,Chen Lanjun,et al.Effect of pre-precipitation on localized corrosion properties of 2519A aluminum alloy[J].Journal of Materials Engineering,2014,6:11-17.
[59] Styczyńska M,Lojkowski W.Grain boundaries as dislocation sources in a material with precipitate-free zones[J].Scripta Metallurgica,1985,19(12):1409-1413.
[60] Su Ruiming,Qu Yingdong,Li Xiang,et al.Effect of retrogression and reaging on stress corrosion cracking of spray formed Al alloy[J].Materials Sciences and Applications,2016,7(1):1-7.
[61] Starink M J.Reduced fracturing of intermetallic particles during crack Propagation in age hardening Al-based alloys due to PFZs[J].Materials Science and Engineering A,2005,390(1/2):260-264.
[62] Thorsten Krol,Dietmar Baither,Eckhard Nembach.The formation of precipitate free zones along grain boundaries in a superalloy and the ensuing effects on its plastic deformation[J].Acta Materialia,2004,52(7):2095-2108.
[63] Yu Yandong,Jiang Peng.Effect of heat treatment on precipitate free zones and rollability of V55Ti30Ni15 alloys[J].Intermetallics,2014,53:56-61.
[64] Xu Yongqian,Zhan Lihua.Effect of creep aging process on microstructures and properties of the retrogressed Al-Zn-Mg-Cu alloy[J].Metals,2016,6(8):1-13.