采用等通道角挤压法(ECAP法)制备亚微米7050铝合金.为了提高合金的力学性能,在挤压过程中增加了固溶时效处理工艺,并对7050铝合金在不同处理工艺条件下的显微组织和力学性能的变化进行了研究.结果表明:ECAP挤压后进行固溶和时效处理能明显提高合金的力学性能.退火态合金经过ECAP后,晶粒尺寸明显细化到亚微米级.将挤压一次的试样进行固溶处理和时效处理,合金的强度在575 MPa左右,而延伸率能达到25.5%左右;若经等通道角挤压过的试样在固溶处理后立即进行再次挤压,并配合时效处理,合金强度能迅速达到616 MPa,延伸率为16.9%.
参考文献
| [1] | Segal VM. .MATERIALS PROCESSING BY SIMPLE SHEAR[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,1995(2):157-164. |
| [2] | Ferrasse S;Segal V M .Microstructure and properties of copper and aluminum alloy 3003 heavily worked by equal channel angular extrusion[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1997,28:1047-1057. |
| [3] | Yoshinori iwahasgi .The process of grain refinement in equal-channel angular pressing[J].Acta materialia,1998(9):3317-3331. |
| [4] | Z.Horita;T.Fujinami .Equal-Channel Angular Pressing of Commercial Aluminum Alloys: Grain Refinement, Thermal Stability and Tensile Properties[J].Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science,2000(3):691-701. |
| [5] | Y.Iwahashi;Z.Horita;M.Nemoto .An investigation of microstructural evolution during equal-channel angular pressing[J].Acta materialia,1997(11):4733-4741. |
| [6] | S.L.Semiatin;P.B.Berbon;T.G.Langdon .DEFORMATION HEATING AND ITS EFFECT ON GRAIN SIZE EVOLUTION DURING EQUAL CHANNEL ANGULAR EXTRUSION[J].Scripta materialia,2001(1):135-140. |
| [7] | Murayama M;Hono K;Horita Z .Microstructure evolution in an Al-1.7% Cu alloy deformed by equal-channel angular pressing[J].Materials Transactions,1999,40(09):938-941. |
| [8] | Segal V M .Equal Channel Angular Extrusion:From macromechanics to structure formation[J].Materials Science and Engineering,1999,A271:322-333. |
| [9] | ZHU Y T;Lowe T C .Observation and issues on mechanisms of grain refinement during ECAP process[J].Materials Science and Engineering,2000,A291:46-53. |
| [10] | Langdon T G;Furukawa M.Using equal-channel angular pressing for regining grain size[J].Journal of The Minerals,Metals & Materials Society,2000(01):30-33. |
| [11] | Nakashima K;Horita Z;Nemoto M .Development of s multi-pass facility for equal-channel angular pressing to high total strains[J].Materials Science and Engineering,2000,A281:82-87. |
| [12] | Akihiro Yamashita;Daisuke Yamaguchi;Zenji Horita;Terence G. Langdon .Influence of pressing temperature on microstructural development in equal-channel angular pressing[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2000(1):100-106. |
| [13] | OH ISHI K;Horita Z;Furukawa M et al.Optimizing the rotation conditions for grain refinement in equal+ channel angular pressing[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1998,29:2011-2013. |
| [14] | Chakkingal U;Suriadi A B;Thomson P F .The development of microstructure and the influence of processing route during equal channel angular drawing of pure aluminum[J].Materials Science and Engineering,1999,A266:241-249. |
| [15] | Kiyotaka Nakashima;Zenji Horita;Minoru Nemoto .Influence of channel angle on the development of ultrafine grains in equal-channel angular pressing[J].Acta materialia,1998(5):1589-1599. |
| [16] | Hyoung Seop Kim;Min Hong Seo;Sun Ig Hong .On the die corner gap formation in equal channel angular pressing[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2000(1/2):86-90. |
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%