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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 On Local Formability of Multi-phase Ultra-high-strength Steels
Author(s) Jun Hu
On-Site Speaker (Planned) Jun Hu
Abstract Scope Various ultra-high-strength steels (UHSSs) have been increasingly adopted in electric vehicles to meet the elevating safety needs for both passengers and batteries. Nevertheless, many cold-rolled UHSSs are multi-phase steels, which are born to have some local formability limitations, despite their balanced tensile elongation and strength. Accordingly, this work will start from explaining the damage mechanisms behind the local formability of the multi-phase UHSSs, and then suggest a few corresponding microstructure strategies to improve the local formability of the future UHSSs. A series of testing results will be presented to support these suggestions. Additionally, inspired by the actual forming conditions, the temperature and strain-rate effects on the local formability will also be overviewed. The ultimate objective of this work is to not only highlight the importance of the local formability but also provide the corresponding references for both the future UHSS development and new forming techniques.
Proceedings Inclusion? Planned:
Keywords Mechanical Properties, Iron and Steel, Shaping and Forming


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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