以新型高强Al-Gu-Li-X铝锂合金2A97为研究对象,通过拉伸试验研究两种三级时效工艺及其改型工艺对合金性能的影响.结果表明,含有δ′相二次析出过程的三级时效和含有δ′相回溶过程的三级时效处理合金的强度和塑性达到T6峰值时效水平,三级时效改型工艺由于增加变形使前者合金的强度升高,塑性降低,使后者的强度显著提高.三级时效和单级时效合金的主要显微组织有δ′相、θ″/θ′相和T1相.三级时效改型工艺由于增加变形促进δ′相析出和δ′相回溶,同时变形促进T1相析出,从而改变了主要强化相δ′相和T1相的数量.
参考文献
| [1] | LUMLEY R N;POLMEAR I J;MORTON A J .Interrupted aging and secondary precipitation in aluminum alloys[J].Materials Science and Technology,2003,19:1483-1490. |
| [2] | KERR M J;SWEET E D;BENNETT C G et al.Effect of alkall impurities on the low temperature thermal stability of 2090 Al-Cu-Li alloys[J].Materials Science Forum,1996,217-222:1079-1084. |
| [3] | K. S. Ghosh;K. Das;U. K. Chatterjee .Studies of microstructural changes upon retrogression and reaging (RRA) treatment to 8090 Al-Li-Cu-Mg-Zr alloy[J].Materials Science and Technology: MST: A publication of the Institute of Metals,2004(7):825-834. |
| [4] | CSONTOS A A;GABER B;STARKE J E A .The effect of quench rate on the microstructure and properties of AF/C458 and AF/C489 Al-Li-Cu-X alloys[J].Materials Science Forum,2000,331-337:1333-1340. |
| [5] | GABLE B M;ZHU A W;CSONTOS A A.The role of plastic deformation on the competitive microstructural evolution and mechanical properties of a novel Al-Li-Cu-X alloy[J].Journal of Light Metals,2001(01):1-14. |
| [6] | WYSS R K;SANDERS J R E .Microstructure-property relationship in a 2xxx aluminum alloy with Mg addition[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1988,19A:2523-2530. |
| [7] | TACK W T;HEUBAUM F H;PICKENS J R .Mechanical properties evaluations of a new ultrahigh strength Al-Li-Cu-Ag-Mg alloy[J].Scripta Metallurgica et Materialia,1990,24:1685-1690. |
| [8] | XIA Xiao-xin .Study ofthe hardening of Al-Li-Cu-Mg-Zr alloy 8091[J].Scripta Metallurgica et Materialia,1992,26:1587-1592. |
| [9] | B.-P. Huang;Z.-Q.Zheng .Independent and combined roles of trace Mg and Ag additions in properties precipitation process and precipitation kinetics of Al-Cu-Li- (Mg)-(Ag)-Zr-Ti alloys[J].Acta materialia,1998(12):4381-4393. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%