通过显微硬度测试、常规拉伸性能测试、扫描电镜和透射电镜等观察手段研究Cu含量对含Sc铝锂合金显微组织和力学性能的影响.结果表明:在Sc元素含量基本不变的情况下,Cu含量为4.2％(质量分数)的合金在均匀化过程中会形成W(AlCuSc)相,且该相在固溶时也不会完全溶解到α(Al).在相同Sc含量条件下,随着α(Al)中Cu含量的下降,w(Cu)/w(Sc)变小,均匀化后形成的W相数量会明显降低,直至消失.由于W相对合金力学性能不利,其数量的减少可以增加合金中有效固溶Cu原子的数量,从而提高合金性能,W相的形成抑制合金中Al3(Sc,Zr)粒子的析出形成.
参考文献
| [1] | S.Iwamura;M.Nakayama;Y.Miura.Coherency between Al_3Sc Precipitate and the Matrix in Al Alloys Containing Sc[J].Materials Science Forum,2002Pt.2(Pt.2):1151-1156. |
| [2] | MJ. Starink;N. Gao;N. Kamp.Relations between microstracture, precipitation, age-formability anddamage tolerance of Al-Cu-Mg-Li (Mn, Zr, Sc) alloys for age forming[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,20061/2(1/2):241-249. |
| [3] | V. G. Davydov;T. D. Rostova;V. V. Zakharov;Yu. A. Filatov;V. I. Yelagin.Scientific principles of making an alloying addition of scandium to aluminium alloys[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,20001(1):30-36. |
| [4] | Marat Gazizov;Viktor Teleshov;Valerij Zakharov.Solidification behaviour and the effects of homogenisation on the structure of an Al-Cu-Mg-Ag-Sc alloy[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,201139(39):9497-9507. |
| [5] | N. I. Kolobnev.ALUMINUM-LITHIUM ALLOYS WITH SCANDIUM[J].Metal Science and Heat Treatment,20027/8(7/8):297-299. |
| [6] | B.A. Chen;G. Liu;R.H. Wang.Effect of interfacial solute segregation on ductile fracture of Al-Cu-Sc alloys[J].Acta materialia,20135(5):1676-1690. |
| [7] | M.Nakayama;Y.Miura.Interaction between #theta#'-Al_2Cu and Al_3Sc in the heterogeneous precipitation in an Al-Cu-Sc alloy[J].Materials Science Forum,20000(0):927-932. |
| [8] | V. Raghavan.Al-Cu-Sc (Aluminum-Copper-Scandium)[J].Journal of Phase Equilibria and Diffusion,20106(6):554-555. |
| [9] | Keith E. Knipling;Richard A. Karnesky;Constance P. Lee;David C. Dunand;David N. Seidman.Precipitation evolution in Al-0.1Sc, Al-0.1 Zr and Al-0.1Sc-0.1Zr (at.%) alloys during isochronal aging[J].Acta materialia,201015(15):5184-5195. |
| [10] | 尹登峰;郑子樵;余志明.Sc对Al-Li-Cu-Mg-Ag-Zr合金组织和性能的影响[J].稀有金属材料与工程,2003(9):736-739. |
| [11] | 王芝秀;郑子樵;李海.少量Sc对Al-Mg-Cu-Li-Zr合金组织与性能的影响[J].材料热处理学报,2008(2):90-94. |
| [12] | Ying Deng;Guofu Xu;Zhimin Yin.Effects of Sc and Zr microalloying additions on the recrystallization texture and mechanism of Al-Zn-Mg alloys[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2013:412-426. |
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%