李晨,李志辉,黄树晖,李锡武,闫宏伟,刘红伟,张永安,熊柏青

• 1:北京有色金属研究总院有色金属材料制备加工国家重点实验室

摘要(Abstract)：

定量研究了7055铝合金进行多道次热变形及固溶处理中的微观组织演变,采用Gleeble-1500D热模拟试验机对7055铝合金进行多道次热压缩,并对热压缩试样进行固溶处理。以EBSD为主要分析手段,对平均晶粒尺寸、再结晶体积分数、大角度晶界比例等微观组织特征进行定量表征。结果表明:升高变形温度和减少变形道次均有利于增大亚结构比例并且抑制再结晶。当变形温度由375℃升高到425℃时,7055铝合金固溶态显微组织的晶粒平均尺寸由65μm增大到420μm,再结晶体积分数由51%减小到10%;当变形道次由单道次增加到3道次时,固溶态显微组织的晶粒平均尺寸由56μm增大到84μm,再结晶体积分数由14%增大到23%。

关键词(KeyWords)： 7055铝合金;多道次热变形;固溶处理;组织演变

Abstract:

Keywords:

基金项目(Foundation): 国家重点基础研究发展计划课题(2012CB619504);; 国家自然科学基金(51274046)

作者(Author): 李晨,李志辉,黄树晖,李锡武,闫宏伟,刘红伟,张永安,熊柏青

DOI: 10.13289/j.issn.1009-6264.2015.12.010

参考文献(References)：

• [1]John L.Advanced aluminum and hybrid aerostructures for future aircraft[J].Mater Sci Forum,2006,519/521(2):1233-1238.
• [2]Shen G S,Furrer D.Manufacturing of aerospace forgings[J].Journal of Materials Processing Technology,2000,98(2):189-195.
• [3]肖代红,巢宏,陈康华,等.微量Sc对AA7085铝合金组织和性能的影响[J].中国有色金属学报,2008,18(12):2145-2150.XIAO Dai-hong,CHAO hong,CHEN Kang-hua,et al.Effect of minor addition on microstructure and properties of AA7085 alloy[J].The Chinese Journal of Nonferrous Metals,2008,18(12):2145-2150.
• [4]熊柏青,李锡武,张永安,等.新型高强韧低淬火敏感性Al-7.5Zn-1.65Mg-1.4Cu-0.12Zr合金[J].中国有色金属学报,2009,19(9):1539-1547.XIONG Bai-qing,LI Xi-wu,ZHANG Yong-an,et al.Novel Al-7.5Zn-1.65Mg-1.4Cu-0.12Zr alloys with high strength high toughness and low quench sensitivity[J].The Chinese Journal of Nonferrous Metals,2009,19(9):1539-1547.
• [5]Robson J D.Microstructural evolution in aluminum alloy 7050 during processing[J].Materials Science and Engineering A,2004,382:112-121.
• [6]Shercliff H R,Lovatt A M,Jensen D J,et al.Modeling of microstructure evolution in hot deformation[J].Plilosophical Transactions:Mathematical,Physical and Engineering Sciences,1999,357(1756):1621-1643.
• [7]Yan L M,Shen J,Li J P.Dynamic recrystallization of 7055 aluminum alloy during hot deformation[J].Materials Science Forum,2010,650:295-301.
• [8]李俊鹏,沈健,闫晓东,等.温度对7075铝合金热变形显微组织演化的影响[J].中国有色金属学报,2008,18(11):1951-1957.LI Jun-peng,SHEN Jian,YAN Xiao-dong,et al.Effect of temperature on microstructure evolution of 7075alloy during hot deformation[J].The Chinese Journal of Nonferrous Metals,2008,18(11):1951-1957.
• [9]Hu H E,Zhang B Y,Yang L.Microstructure characterization of 7050 aluminum alloy during dynamic recrystallization and dynamic recovery[J].Materials Characterization,2008,59(9):1185-1189.
• [10]Shen J,Gottstein G.Modelling of microstructure evolution of aluminum alloy during thermo-mechanical processing[J].Materials Science&Technology,2001,9:329-334.
• [11]李俊鹏,沈健,闫晓东,等.多道次热压缩过程中7050铝合金的再结晶行为[J].中国有色金属学报,2009,19(10):1754-1758.LI Jun-peng,SHEN Jian,YAN Xiao-dong,et al.Recrystallization behavior of 7050 aluminum alloy during multi-pass hot compression process[J].The Chinese Journal of Nonferrous Metals,2009,19(10):1754-1758.
• [12]Jurgen Hirsch.Thermo-mechanical control in aluminum sheet production[J].Materials Science Forum,2003,426(1):185-194.
• [13]Malek P,Cieslar M.The influence of processing route on the plastic deformation of Al-Zn-Mg-Cu alloy[J].Materials Science&Engineering A,2002,324(Special Issue):90-95.
• [14]Ricks R A.The deformation models needed by the aluminum industry[J].Phil Trans R Soc Lond A,1999,357:1513-1529.

文章评论(Comment)：