采用原位反应液相线铸造方法制备含有2.5%(体积分数)原位TiC颗粒的7075铝合金,在其固液两相区进行二次加热保温实验,淬火固定其半固态组织后,通过扫描电镜观察合金的晶粒长大规律,研究原位颗粒对晶粒长大行为的影响.结果表明,原位TiC颗粒不仅使合金铸态组织直接变为等轴晶组织,而且在合金的二次加热过程中对晶粒长大行为具有抑制作用,在600℃保温5、10和30min的相同条件下,TiCp/7075铝基复合材料晶粒尺寸比7075基体铝合金的减小30-40μm.
参考文献
| [1] | 苏华钦,朱鸣芳,高志强.半固态铸造的现状及发展前景[J].特种铸造及有色合金,1998(05):1-6. |
| [2] | 毛卫民,赵爱民,钟雪友.半固态金属成形应用的新进展与前景展望[J].特种铸造及有色合金,1998(06):33-36. |
| [3] | Ferrante M;De Freitas E .Rheology and microstructural development of a Al-4 wt.% Cu alloy in the semi-solid state[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,1999(1/2):172-180. |
| [4] | Suery M;Favier D;Gebelin JC .Characterisation of the rheological behaviour in the semi-solid state of grain-refined AZ91 magnesium alloys[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,1999(1):134-144. |
| [5] | Zoqui EJ.;Shehata MT.;Paes M.;Kao V.;Es-Sadiqi E. .Morphological evolution of SSM A356 during partial remelting[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2002(1/2):38-53. |
| [6] | Lawrynowicz D E;Wolfenstine J;Lavernia E J .Grain growth mechanisms in a spray-formed Ni3Al/Al2O3 composite in the presence of a liquid phase[J].Materials Science and Engineering A,1997,230:1-7. |
| [7] | J. L. Wang;Y. H. Su;C. -Y. A. Tsao .STRUCTURAL EVOLUTION OF CONVENTIONAL CAST DENDRITIC AND SPRAY-CAST NON-DENDRITIC STRUCTURES DURING ISOTHERMAL HOLDING IN THE SEMI-SOLID STATE[J].Scripta materialia,1997(12):2003-2007. |
| [8] | Manson E D;Stone I C;Jones J R et al.Isothermal grain coarsening of spray formed alloy in the semi-solid state[J].Acta Materialia,2002,50:2517-2535. |
| [9] | Xia K.;Tausig G. .Liquidus casting of a wrought aluminum alloy 2618 for thixoforming[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,1998(1/2):1-10. |
| [10] | 罗守靖,姜巨福,祖丽君,滕东东.SiCp/2024 复合材料半固态坯二次加热组织的研究[J].材料科学与工艺,2003(01):1-5. |
| [11] | 管仁国,温景林,刘相华,陈彦博.小热变形半固态A2017合金的二次加热组织与半固态轧制[J].中国有色金属学报,2002(05):1002-1006. |
| [12] | 刘慧敏,王洪斌,杨滨,何建平,张济山.原位TiC颗粒对喷射成形铝合金组织的影响[J].北京科技大学学报,2003(04):337-340. |
| [13] | Huimin Liu;Hua Cu;Bin Yang .Isothermal grain growth of reactive spray formed 7075 alloys in semi-solid state[J].Journal of University of Science and Technology Beijing,2004(5):411-414. |
| [14] | 路贵民,董杰,崔建忠,常守威.7075 Al合金液相线半连续铸造组织及形成机理[J].金属学报,2001(10):1045-1048. |
| [15] | 武恭;姚良均;李震霞.铝及铝合金材料手册[M].北京:科学出版社,1997:255-256. |
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%