Journal
CIRP ANNALS-MANUFACTURING TECHNOLOGY
Volume 71, Issue 1, Pages 253-256Publisher
ELSEVIER
DOI: 10.1016/j.cirp.2022.04.013
Keywords
Metal forming; Strain; Ultra -fine grain
Funding
- Severe plastic deformation by incremental processes-SPeDITO [BIRD195839-2019]
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This paper introduces a new approach to produce large size ultra-fine grained (UFG) metal sheets using a constrained flowforming process under high hydrostatic pressure. The metal sheets manufactured by this process have an isotropic grain distribution and an average grain size of 4 mm.
The last decades have seen several attempts to develop Severe Plastic Deformation (SPD) processes to manufacture parts with Ultra-Fine Grained (UFG) microstructure without additional thermal processing. However, they remained mostly focused on producing small components, often in the micro-scale range, thus limiting the technological and environmental impact of SPD techniques. The paper introduces a new approach to produce large size UFG metal sheets which main innovation lies in a constrained flowforming process that allows obtaining large deformations under high hydrostatic pressure. Metal sheets with isotropic grain distribution and average grain size of 4 mm were manufactured by this process chain and their mechanical properties assessed.
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