通过显微硬度测试、拉伸实验和透射电镜观察,研究不同热处理状态(T6、T8)和微量Zn的添加对Weldalite~(TM)210Al-Li合金显微组织和拉伸性能的影响.结果表明:Weldalite~(TM)210Al-Li合金具有很高的强度,在T6状态下,该合金的主要析出强化相是θ'相、δ'相和T_1相;而在T8状态下,其主要强化相是δ'相和T_1相,预变形促进T_1相的析出,提高T8状态下合金的时效强化效果;微量Zn的添加明显促进T_1相的析出和弥散分布,使合金强度提高,但Zn的加入使合金塑性略有下降.
The effects of different aging treatments (T6 and T8) and small additions of Zn on the microstructures and the tensile properties of the Weldalite~(TM)210 alloy were studied by microhardness test, tensile test and TEM. The results indicate that the Weldalite~(TM)210 alloy has high strength. Under T6 condition, the major strengthening phases of the Weldalite~(TM)210 alloy are θ', δ' and T_1 phases. Under T8 condition, the major strengthening phases are δ' and T_1 phases. Predeformation promotes the precipitation of T_1 phase. The higher strength in T8 temper is attributed to high volume fraction of T_1 phase. The small addition of Zn promotes T_1 precipitation and their dispersive distribution, thus increases the strength of the Weldalite~(TM)210 alloy. But the small addition of Zn has unfavourable effect on the ductility of the Weldalite~(TM)210 alloy.
参考文献
| [1] | GAYLE F W;TACK W T;SWANSON G;HEUBAUM F H PICKENS J R .Composition and anisotropy in an Al-Cu-Li-Ag-Mg-Zr alloys[J].Scripta Metallurgica et Materialia,1994,30(06):761-766. |
| [2] | K. S. KUMAR;S. A. BROWN;J. R. PICKENS .MICROSTRUCTURAL EVOLUTION DURING AGING OF AN Al-Cu-Li-Ag-Mg-Zr ALLOY[J].Acta materialia,1996(5):1899-1915. |
| [3] | GAYLE F W .Structure and properties during aging of an untra-high strength AL-Cu-Li-Ag-Mg alloy[J].Scripta Metallurgica et Materialia,1990,24(01):79-84. |
| [4] | JO H H;HIRANO K I .Precipitation processes in Al-Cu-Li alloy studying by DSC[J].Materials Science Forum,1987,13/14:377-382. |
| [5] | 郑子樵;黄碧萍;尹登峰 .微量Ag和Mg在2195合金中的合金化作用[J].中南大学学报,1998,29(01):42-45. |
| [6] | M. Murayama;K. Hono .Three dimensional atom probe analysis of pre-precipitate clustering in an Al-Cu-Mg-Ag alloy[J].Scripta materialia,1998(8):1315-1319. |
| [7] | Hirosawa S.;Kamio A.;Sato T. .Effects of Mg addition on the kinetics of low-temperature precipitation in Al-Li-Cu-Ag-Zr alloys[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,1998(1/2):195-201. |
| [8] | HUANG J C;ARDELL A J .Addition rules and the contribution of δ' precipitates to strengthening of aged Al-Li-Cu alloys[J].Acta Metallurgica,1988,36(11):2995-3006. |
| [9] | KUMAR K S;BROWN S A;PICKENS J R .Effect of a prior stretch on the aging response of an Al-Cu-Li-Ag-Mg-Zr alloy[J].Scripta Metallurgica et Materialia,1990,24(07):1245-1250. |
| [10] | HUANG J C;ARDELL A J .Strengthening mechanisms associated with T_1 particles in two Al-Li-Cu alloys[J].Journal of de Physique Colloque,1987,48(09):373-383. |
| [11] | 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. |
| [12] | 尹登峰,郑子樵,余志明.微量Sc对2195铝锂合金应变时效态的显微组织和力学性能的影响[J].中国有色金属学报,2003(03):611-615. |
| [13] | CASSADA W A;SHIFLET G J;STARKE E A .Effect of plastic deformation on Al2CuLi (T_1) precipitation[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1991,22(02):299-306. |
| [14] | 蒋晓军;邓文;桂全红;李依依 熊良铖 师昌绪 .Zn对Al-Li-Cu-Mg-Zr合金时效过程的影响[J].金属学报,1993,29(12):527-532. |
| [15] | BAUMANN S F;WILLIAMS D B.The effect of ternary additions on the δ'/α misfit and the δ' solvus line in Al-Li alloys[A].California:The Metallurgical Society of AIME,1984:17-30. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%