研究了ML377铝锂合金高温拉伸性能以及长时间热暴露后的室温力学性能.同时对合金热暴露前后的显微组织进行了.透射电镜观察.实验结果表明:ML377合金高温拉伸强度随拉伸温度的升高而逐渐降低,在200℃下的高温瞬时拉伸性能优于传统高温用铝合金.在107℃、150℃热暴露条件下,ML377合金的强度没有明显下降,这是因为合金中T1相在此温度下具有较强的抗粗化能力;但200℃热暴露条件下,T1相显著粗化,部分T1相溶解向平衡相转化,导致合金力学性能明显下降.
参考文献
| [1] | Pohnear I J;Pons G;Barbaux Y et al.After Concorde:evaluation of crecp resistant Al-Cu-Mg-Agalloys[J].Materaiis Science and Technology,1996,15:861-868. |
| [2] | Robinson JS.;Cudd RL.;Evans JT. .Creep resistant aluminium alloys and their applications[J].Materials Science and Technology: MST: A publication of the Institute of Metals,2003(2):143-155. |
| [3] | Kazanjian S M;Wang N;Starke E A Jr .Creep behavior and microstruetural stability of AI-Cu-Mg-Ag and Al-Cu-Li-Mg-Ag alloys[J].Materials Science and Engineering A,1997,234-236:571-574. |
| [4] | Fdahl R A Jr;Domnck M S .Effect of thermal exposure on the tensile proporties of ahiminum alloys fer elevated temperature service[NASA/TP-2004-212988][R].Langley Research Center Hampton Virginia National Aeronautics and Space Administration,2004. |
| [5] | Plomear I J;Couper M J .Design and development of an experimental wrought aluminum alloy for use at elevated temperatures[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1988,19(04):1027-1035. |
| [6] | Lee YS. .Microstructures in over-aged Al-Cu-Li-Mg-Ag alloys[J].Journal of Materials Science Letters,1998(14):1161-1164. |
| [7] | Flower H M;Gregson P J .Solid state phase transformations in aluminium alloys containing lithium[J].Mater Scie Tech,1987,3(02):81-90. |
| [8] | Nie J F;Muddle B C;Polmesx I J .Effect of precipitate shape and orientation on dispersion strengthening in high strength aluminium alloys[J].Materials Science Forum,1996,217-222(02):1257-1262. |
| [9] | Shiflet G J;Mangan MA;Menng G .Growth by ledges[J].lnterfaco Science,1998,6(1-2):133-154. |
| [10] | ünlü N;Gable B M;Shifter G J et al.The effect of cold workon tbe precipitation of A[J].,2003,34(12):2757-2769. |
| [11] | Hutchinson C R;Fan X;Pennycook S J et al.On the origin of the high coarseniag resistence[J].,49(14):2827-2841. |
| [12] | M.Murayama;K.Hono .ROLE OF AG AND MG ON PRECIPITAITON OF T_1 PHASE IN AN Al-Cu-Li-Mg-Ag ALLOY[J].Scripta materialia,2001(4):701-706. |
| [13] | 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. |
| [14] | Huang J C;Ardell A J .Crystal structure and stability of T1 precipitates in aged Al-Li-Cualloys[J].Materials Science and Technology,1987,3(03):176-188. |
| [15] | Gable B M;Pana M A;Shiflet G J et al.The role of trace edditionon the T1 coarsening behaviorin AI-Li-Cu-X alloys[J].Materials Science Forum,2002,396-402(02):699-704. |
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%