Three-dimensional quantification of texture heterogeneity in single-crystal aluminium subjected to equal channel angular pressing. Issue 11 (13th April 2017)

• Record Type: Journal Article
• Authors: Liu, Mao; Nambu, Shoichi; Koseki, Toshihiko; Tieu, Kiet Anh; Zhou, Kun
• Is Part Of: Philosophical magazine. Volume 97:Issue 11(2017)
• Page Start: 799
• Page End: 819
• Publication Date: 2017-04-13
• Subjects: Equal channel angular pressing -- three-dimensional -- crystal plasticity finite element method -- single-crystal aluminium -- texture; Condensed matter -- Periodicals; Physics -- Periodicals; Matière condensée -- Périodiques; Physique -- Périodiques; 530.41
• DOI: 10.1080/14786435.2017.1282179
• Languages: English
• ISSNs: 1478-6435

Abstract

Abstract: A three-dimensional crystal plasticity finite element method (3D CPFEM) modelling of a real equal channel angular pressing (ECAP) process for investigating the mechanical properties and texture evolutions of single-crystal aluminium has been developed for the first time. The challenge of modelling such a severe plastic deformation via 3D CPFEM is how to accurately predict the deformation mechanism under the complicated contact conditions between a billet and a die. The validation by comparison with experimental observations demonstrates that the developed 3D CPFEM ECAP model is able to precisely capture the deformation characteristics at the microscale. Furthermore, this research clarified the previously remaining disputes such as the microstructural formation mechanism in the deformed area and the deformation nature in the plastic deformation zone. It is also the first time to extensively discuss the orientation-dependent deformation feature of the ECAP-processed billets, including morphology, lattice rotation angle and grain refinement.