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Meeting 2024 TMS Annual Meeting & Exhibition
Symposium Formability and Spring-back Issues in Ultra-high Strength Steels and High Strength Aluminum Alloys
Presentation Title Hybrid Bead Development and Validation; Auto Steel Partnership
Author(s) Chris Roman
On-Site Speaker (Planned) Chris Roman
Abstract Scope Springback remains a significant issue in cold stamping with the implementation of higher strength steels. To address this, hybrid beads were investigated as an alternate approach to traditional stake beads as a method to address springback and improve material utilization. To accomplish this, stamping simulations and physical die trials were performed to design and compare different hybrid bead geometries. In all, five hybrid bead designs were evaluated in a laboratory scale trial and two of these designs were subsequently used in a larger production scale die trial. During these production scale die trials, both the robustness of the beads and the associated forming forces emerged as significant issues with successfully implementing them. Hybrid beads did prove to be effective is reducing springback and side wall curl when sufficient forming forces were available. Additional work would be required to further develop alternate hybrid bead geometries for their successful implementation.
Proceedings Inclusion? Planned:


A Investigation of the Bendability of Friction-stir Processed Aluminum 7075 & 6111 Alloys and Its Effect on Formability
Anisotropic Fracture of Mild and Advanced High Strength Steel in Non-linear Strain Paths
Dimensional Control in Flexible Fabrication of Sheet Metals for Automotive Applications
Hot Stamping of Third Generation Advanced High Strength Steels
Hybrid Bead Development and Validation; Auto Steel Partnership
Influence of Yoshida-Uemori Model on Springback Prediction
Microstructure and Mechanical Properties According to Heat Treatment of High Tensile Strength Steel Alloy
On Local Formability of Multi-phase Ultra-high-strength Steels
Retrogression Forming and Reaging for Forming and Joining AA7075-T6 Sheet
Roller Bending/Unbending Process for Improving the Local Mechanical Properties of Aluminum Sheets
The “Next Era in Stamping Technology” (NEST), The Fundamentals of a Hybrid Stamping Technology

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