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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
Sponsorship TMS Materials Processing and Manufacturing Division
TMS: Shaping and Forming Committee
Organizer(s) Mert Efe, Pacific Northwest National Laboratory
Piyush Upadhyay, Pacific Northwest National Laboratory
Lu Huang, General Motors
Gang Huang, ArcelorMittal
Yannis P. Korkolis, Ohio State University
Amir Asgharzadeh, EWI
Scope With the dawn of the electric vehicles (EV) and more stringent emission requirements, lightweighting of automotive vehicles has become more critical. However, expensive battery systems and vehicle electronics are putting pressure on the cost of weight savings. Newer generations of ultra-high strength steels (UHSS, UTS > 1000 MPa) and high-strength aluminum alloys (HSAA, UTS > 300 MPa) are becoming available to provide weight savings at minimal or no cost. They are also recyclable and have a lower carbon footprint compared to the other lightweight material alternatives, further supporting their contribution to sustainable and lower emission transportation. With the increasing strength, formability and springback are becoming pressing issues for component fabrication. Dimensional control and stability of the stamped part become challenging with the higher springback. In addition, lower local formability and fracture result in cracking and failure near edges, flanges, holes, and bent corners. This gathering aims to provide a venue to present, discuss and share solutions and challenges associated with addressing fracture and spring back issues in various UHSS and HSAA sheet-forming processes.

Areas of topics include, but are not limited to:
- Local thermo-mechanical and/or heating techniques to improve formability and reduce springback
- Incremental forming techniques, including roll forming, to control the stress state and improve fracture limits
- Local or global alloying methods to improve formability
- Global thermo-mechanical processing in combination with aging/tempering treatment to deliver the high strength with desired formability
- Formability near sheared edges
- Stamping in-line process control and AI/ML techniques to minimize the forming defects
- Friction control in stamping/forming processes
- Flexible forming methods and digitized dies to enable tight bend radii and complex shapes without failure during forming
- Warm and hot forming.

Abstracts Due 07/15/2023
Proceedings Plan 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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