以2090及2090+Ce合金为对象,研究了电场固溶处理对合金性能和断裂特征的影响,并探讨了其作用机理.研究发现,电场固溶可显著提高合金的延伸率,尤其是2090合金,且试样作负极时效果更明显;但电场除可较小幅度提高2090合金的极限强度外,对合金的强度几乎没有影响;电场固溶还改变了合金的断裂方式,减小了沿晶分层断裂比例,增加了穿晶断裂比例和微区塑性变形.经理论分析,作者认为,电场是通过对空位的作用来影响合金的析出相变和合金元素的晶界偏析,从而改善合金的性能.
参考文献
| [1] | Washer R;Hagenbeck R .Grain boundaries in dielectric and mixed-conducting ceramics[J].Acta Materialia,2000,48:797. |
| [2] | Fu Ran;Zhang Tong-yi .Influences of temperature and electric field on the bending strength of Lead-Zirconate Titanate ceramics[J].Acta Materialia,2000,48:1729. |
| [3] | Koch C C .Experimental evidence for magnetic or electric field effects on phase transformations[J].Materials Science and Engineering,2000,A287:213. |
| [4] | Conrad H;Guo Z;SPRECHER A F .Effect of an electric field on the recovery and recrystallization of Al and Cu[J].Scripta Metallurgica et Materialia,1989,23(06):821. |
| [5] | Liu W.;Zheng YK.;Cui JZ.;Liang KM. .Study of the diffusion of Al-Li alloys subjected to an electric field[J].Journal of Materials Science,1998(4):1043-1047. |
| [6] | Liu W;Cui J Z .Effect of the homogenization treatment in an electric field on T1 precipitation in 2091 Al-Li alloy[J].Scripta Metallurgica et Materialia,1995,33(04):623. |
| [7] | Liu W;Liang K M;Zheng Y K .Effect of an electric field during solution treatment of 2091 Al-Li alloy[J].Journal of Materials Science Letters,1996,15:1327. |
| [8] | Conrad H;Cao W D;Lu X P et al.Effect of electric field on cavotation in superplastic aluminum alloy 7475[J].Materials Science and Engineering,1991,A138:247. |
| [9] | 冯端.金属物理学[M].北京:科学出版社,1988:114. |
| [10] | Blankship C P;Hornbogen E;Starke E A .Predicting slip behavior in alloys containing shearable and strong particles[J].Materials Science and Engineering A,1993,A169:33. |
| [11] | 张敏刚 等.稀土Ce对2090铝锂合金晶界内耗的影响[J].机械工程材料,1999,23(03):7. |
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