Differential speed rolling of twin-roll-cast 6xxx al alloy strips and its influence on the sheet formability
Autor: | Seong Guk Son, Jae-Hyung Cho, Hyung Wook Kim, Jae Chul Lee, Hong Kyu Kim |
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Rok vydání: | 2015 |
Předmět: |
Materials science
Viscoplasticity 020502 materials Alloy Metallurgy Metals and Alloys 02 engineering and technology STRIPS engineering.material 021001 nanoscience & nanotechnology Condensed Matter Physics law.invention 0205 materials engineering Mechanics of Materials law Solid mechanics Materials Chemistry Hardening (metallurgy) engineering Formability 0210 nano-technology Series expansion Anisotropy |
Zdroj: | Metals and Materials International. 22:108-117 |
ISSN: | 2005-4149 1598-9623 |
DOI: | 10.1007/s12540-015-5255-3 |
Popis: | We demonstrate the feasibility of a technique that combines twin-roll strip casting, asymmetric rolling, and subsequent heat treatment, in obtaining Al alloy sheets with high-strength/high-formability. The precipitation- hardening Al alloy sheet thus obtained exhibited an excellent formability ( $\bar r$ = 1.20, Δr = 0.17) and mechanical properties (σTS = 265 MPa, e = 35%), which cannot be readily obtained via the conventional route based on direct-chill casting and heavy rolling operation. In this study, we examined the effects of the various process conditions used at different stages of the process that contribute to the development of specific textures. Simulation studies based on the generalized spherical harmonic series expansion method and the viscoplastic self-consistent (VPSC) model were conducted to arrive at a comprehensive understanding of the factors associated with the high formability realized in Al alloy sheet. It was found that specific textures evolved via twin-roll strip casting, asymmetric rolling, and heat treatment canceled out the anisotropic characteristics of the individual textures, resulting in the high sheet formability. |
Databáze: | OpenAIRE |
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