童芳,王卫国,Rohrer Gregory S,陈松,洪丽华,林燕,刘光辉,黄新宇,冯小铮

• 1:福建工程学院晶界工程研究所
• 2:福建工程学院材料科学与工程学院
• 3:Department of Materials Science and Engineering
• 4:Carnegie Mellon University

摘要(Abstract)：

相较于一般晶界，{1 1 1}/{1 1 1}近奇异晶界具有更高的腐蚀抗力，如何提高此类晶界比例以从根本上改善晶间腐蚀性能是Al-Mg合金研究的一个新课题。首先在180～300℃对组织均匀化的Al-Mg合金样品进行厚度减缩量为80%的预变形轧制，随后立即在380℃保温20 min完成再结晶。采用基于电子背散射衍射和五参数分析的晶界界面匹配定量表征方法测定再结晶样品中的{1 1 1}/{1 1 1}近奇异晶界比例。结果表明，预变形温度对Al-Mg合金后续再结晶退火过程中{1 1 1}/{1 1 1}近奇异晶界的形成有显著影响，表现为{1 1 1}/{1 1 1}近奇异晶界比例随预变形温度的升高呈现先上升后下降的变化规律，经210℃预变形后再经380℃/20 min再结晶退火的样品，其{1 1 1}/{1 1 1}近奇异晶界比例达到极大值，为6.18%。分析指出，经不同温度预变形的样品形成不同的变形亚结构，其在后续退火过程中的再结晶行为存在显著差异；经210℃预变形的样品，其在后续退火过程发生连续再结晶行为，这是其{1 1 1}/{1 1 1}近奇异晶界比例达到极大的主要原因。

关键词(KeyWords)： Al-Mg合金;晶界界面匹配;近奇异晶界;晶间腐蚀

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51971063)

作者(Author): 童芳,王卫国,Rohrer Gregory S,陈松,洪丽华,林燕,刘光辉,黄新宇,冯小铮

DOI: 10.13289/j.issn.1009-6264.2022-0536

参考文献(References)：

• [1] 侯世忠.舰船用铝合金的研究与应用[J].铝加工，2019(5):4-8.HOU Shi-zhong.Research and application of ship aluminum alloy[J].Aluminum Processing,2019(5):4-8.
• [2] 付彭怀，彭立明，丁文江.汽车轻量化技术：铝/镁合金及其成型技术发展动态[J].中国工程科学，2018,20(1):84-90.FU Peng-huai,PENG Li-ming,DING Wen-jiang.Automotive lightweight technology:Development trends of aluminum/magnesium alloy and its forming technology[J].Engineering Science,2018,20(1):84-90.
• [3] 方振邦，张志强，李颖，等.7N01S-T5铝合金厚板搅拌摩擦焊接头的晶间腐蚀行为[J].材料导报，2019,33(2):304-308.FANG Zheng-bang,ZHANG Zhi-qiang,LI Ying,et al.Intergranular corrosion behavior of friction stir welded joints of 7N01S-T5 aluminum alloy plate[J].Materials Reports,2019,33(2):304-308.
• [4] Jones R H,Baer D R,Danielson M J,et al.Role of Mg in the stress corrosion cracking of an Al-Mg alloy[J].Metallurgical and Materials Transactions A,2001,32(7):1699-1711.
• [5] Searles J L,Gouma P I,Buchheit R G.Stress corrosion cracking of sensitized AA5083 (Al-4.5 Mg-1.0 Mn)[J].Metallurgical and Materials Transactions A,2001,32(11):2859-2867.
• [6] Birbilis N,Buchheit R G.Electrochemical characteristics of intermetallic phases in aluminum alloys:An experimental survey and discussion[J].Journal of the Electrochemical Society,2005,152(4):B140.
• [7] Zhang R,Qiu Y,Qi Y,et al.A closer inspection of a grain boundary immune to intergranular corrosion in a sensitised Al-Mg alloy[J].Corrosion Science,2018,133:1-5.
• [8] Searles J L,Gouma P I,Buchheit R G.Stress corrosion cracking of sensitized AA5083 (Al-4.5 Mg-1.0 Mn)[J].Metallurgical and Materials Transactions A,2001,32(11):2859-2867.
• [9] Qiu Y,Yang X,Li J,et al.The influence of Sc and Zr additions on microstructure and corrosion behavior of AA5182 alloy sheet[J].Corrosion Science,2022,199:110181.
• [10] Guo C,Zhang H,Li S,et al.Evolution of microstructure,mechanical properties and corrosion behavior of Al-4Mg-2Zn-0.3Ag (wt.%) alloy processed by T6 or thermomechanical treatment[J].Corrosion Science,2021,188:109551.
• [11] Watanabe T.An approach to grain boundary design for strong and ductile polycrystals[J].Res Mechanica,1984,11(1):47-84.
• [12] Prithiv T S,Bhuyan P,Pradhan S K,et al.A critical evaluation on efficacy of recrystallization vs.strain induced boundary migration in achieving grain boundary engineered microstructure in a Ni-base superalloy[J].Acta Materialia,2018,146:187-201.
• [13] 刘智强，王卫国.冷轧变形Al-Cu合金再结晶Σ3晶界研究[J].电子显微学报，2018,37:232-237.LIU Zhi-qiang,WANG Wei-guo.Study on Σ3 boundaries in an cold rolled and recrystallized Al-Cu alloy[J].Chinese Journal of Electron Microscopy,2018,37:232-237.
• [14] Wang W G,Cai C H,Rohrer G S,et al.Grain boundary inter-connections in polycrystalline aluminum with random orientation[J].Materials Characterization,2018,144:411-423.
• [15] Du A H,Wang W G,Gu X F,et al.The dependence of precipitate morphology on the grain boundary types in an aged Al-Cu binary alloy[J].Journal of Materials Science,2021,56(1):781-791.
• [16] 王卫国，杜阿华，杨先明，等.晶界界面匹配定量表征方法：中国，202011173146.8[P].2021-02-05.WANG Wei-guo,DU A-hua,YANG Xian-ming,et al.Quantitative determination of grain boundary inter-connections:China,202011173146.8[P].2021-02-05.
• [17] Frank C.Orientation mapping:1987 mrs fall meeting von hippel award lecture[J].MRS Bulletin,1988,13(3):24-31.
• [18] Saylor D M,El-Dasher B S,Adams B L,et al.Measuring the five-parameter grain-boundary distribution from observations of planar sections[J].Metallurgical and Materials Transactions A,2004,35(7):1981-1989.
• [19] Randle V,Rohrer G S,Hu Y.Five-parameter grain boundary analysis of a titanium alloy before and after low-temperature annealing[J].Scripta Materialia,2008,58(3):183-186.
• [20] Wolf D.Structure-energy correlation for grain boundaries in FCC metals—I.Boundaries on the (111) and (100) planes[J].Acta Metallurgica,1989,37(7):1983-1993.
• [21] Yang X,Wang W,Gu X.The near singular boundaries in BCC iron[J].Philosophical Magazine,2022,102(5):440-466.
• [22] Xie B,Zhang B,Ning Y,et al.Mechanisms of DRX nucleation with grain boundary bulging and subgrain rotation during the hot working of nickel-based superalloys with columnar grains[J].Journal of Alloys and Compounds,2019,786:636-647.
• [23] Zhang J,Yi Y,Huang S,et al.Dynamic recrystallization mechanisms of 2195 aluminum alloy during medium/high temperature compression deformation[J].Materials Science and Engineering A,2021,804:140650.
• [24] Zhao J,Deng Y,Tang J.Grain refining with DDRX by isothermal MDF of Al-Zn-Mg-Cu alloy[J].Journal of Materials Research and Technology,2020,9(4):8001-8012.
• [25] Guan W,Linyuan K,Zhiwen L,et al.Flow softening behavior and microstructure evolution of aluminum alloy 6061 due to dynamic recovery[J].Materials Research Express,2019,6(5):056555.

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