等径角挤压(ECAE)可以在不改变材料横截面的条件下使其反复产生大的塑性变形,从而使材料的晶粒得到细化,是制备块状超细晶粒材料的有效方法.通过对GCr15钢ECAE变形过程进行数值模拟,获得了挤压过程中不同的外接圆弧角Ψ和不同摩擦系数μ对挤压载荷和等效应变的影响规律.结果表明,挤压载荷随着外接圆弧角Ψ的增加而减小,随着摩擦系数μ的增加而增大;而变形均匀性则随着Ψ和μ的增加而减小.
参考文献
| [1] | Gertsman V Y;Birringer R;Valiev R Z .On the Structure and Strength of Ultrafine-Drained Copper Produced by Severe Plastic Deformation[J].Scripta Metallurgica et Materialia,1994,30(02):229-234. |
| [2] | Valiev R Z;Korzmkov A V;Mulyukov R R .Structure and Properties of Ultrafine Materials Produced by Severe Plastic Deformation[J].Materials Science and Engineering,1993,A168:141-148. |
| [3] | Segal VM. .MATERIALS PROCESSING BY SIMPLE SHEAR[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,1995(2):157-164. |
| [4] | Valiev RZ.;Alexandrov IV.;Islamgaliev RK. .Bulk nanostructured materials from severe plastic deformation [Review][J].Progress in materials science,2000(2):103-189. |
| [5] | 居志兰,戈晓岚,许晓静.ECAP细化晶粒法的仿真与分析[J].材料科学与工程学报,2003(02):255-258. |
| [6] | Li Saiyi;Irene J;Beyerlein et al.Heterogeneity of Deformation Texture in Equal Channel Angular Extrusion of Copper[J].Acta Materialia,2004,52:4 859-4 875. |
| [7] | 杨瑞成,安丽丽,季根顺.GCr15轴承钢压缩塑性流动研究[J].甘肃工业大学学报,1993(01):15. |
| [8] | 刘咏,唐志宏,周科朝,李志友.纯铝等径角挤技术（Ⅱ）--变形行为模拟[J].中国有色金属学报,2003(02):294-299. |
| [9] | Raghavan Srinivasan .COMPUTER SIMULATION OF THE EQUICHANNEL ANGULAR EXTRUSION (ECAE) PROCESS[J].Scripta materialia,2001(1):91-96. |
| [10] | Hyoung Seop Kim;Min Hong Seo;Sun Ig Hong .Plastic deformation analysis of metals during equal channel angular pressing[J].Journal of Materials Processing Technology,2001(1/3):622-626. |
| [11] | S. Li;M.A.M. Bourke;I.J. Beyerlein .Finite element analysis of the plastic deformation zone and working load in equal channel angular extrusion[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2004(1/2):217-236. |
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%