The Prestrain Effect on the Sheared Edge Flangeability of Dual Phase 780 Steels United States Steel Corporation

Format:

Conference/Event

Author/Creator:

Chiriac, Chiriac, author.

Contributor:

Link, Todd M.

Shi, Ming F.

Conference Name:

SAE 2012 World Congress & Exhibition (2012-04-24 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2012

Summary:

Edge flanging represents one of the forming modes employed in multistage forming, and advanced high strength steels (AHSS) are more prone to edge cracking during sheared edge flanging than the conventional high strength steels (HSS) and mild steels. The performance of the sheared edge in flanging operation depends on the remaining ductility of the material in the sheared edge after the work hardening (WH) and damage produced by blanking and subsequent forming operations. Therefore, it is important to analyze the effect of work hardening produced by blanking and subsequent forming operations prior to edge flanging on the edge flanging performance. In this study, the effect of different forming operation sequences prior to edge flanging on the edge flanging performance was analyzed for a dual phase 780 steel. Sheared edge flanging performance was evaluated by hole expansion testing of specimens produced by the following forming operation sequences:The results show that the hole expansion limit is not affected by uniaxial or biaxial prestraining prior to hole punching. Therefore, work hardening in multistage forming prior to edge trimming should have little or no effect on edge flangeability

Notes:

Vendor supplied data

Publisher Number:

2012-01-0533

Access Restriction:

Restricted for use by site license