中國有色金屬學報(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 35 No. 5 May 2025 |
（1. National Engineering Research Center for Equipment and Technology of Cold Strip Rolling, Yanshan University, Qinhuangdao 066004, China;
2. Faculty of Mechanical Engineering, Chongqing Industry Polytechnic College, Chongqing 401020, China;
3. Tongchuang Special Materials Co., Ltd., Lishui 323000, China;
4. Department of Civil and Mechanical Engineering, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark）
Abstract:Traditional symmetrical rolling often induces through-thickness gradient microstructures and textures. In this study, ultra-high purity (99.999 wt.%) tantalum (Ta) served as a model material to address the texture gradient issue by employing dynamic offsets and shear force adjustment rolling (DS rolling) as an advanced rolling technique. The strain and stress distributions in Ta plates for DS rolling and symmetrical rolling processes were analyzed using Deform 3D software. Through-thickness textures and microstructures were characterized via electron backscatter diffraction. The results revealed that DS rolling effectively solved the problem of texture gradient by increasing the average shear strain from 0.05 to 0.56. In turn, the shear stress reduced the energy storage orientation dependence of {100} and {111} grains. Furthermore, DS rolling refined the recrystallized grains on an average of 30.9%.
Key words: tantalum; texture gradient; rolling; energy storage; shear stress
