Investigation of necking and fracture strain limits of medium-Mn steel sheet under hot stamping conditions
File(s)
Author(s)
Tong, Chenpeng
Zhang, Ruiqiang
Xu, Dechao
Shi, Zhusheng
Type
Conference Paper
Abstract
Medium-Mn (MMn) steels with low austenitisation temperatures have recently attracted much research attention because of their suitability for hot stamping to save cost and improve productivity. However, research on their formability under conditions that mimic industrial hot stamping is still lacking. In this study, an innovative method for biaxial testing, which includes a cruciform specimen design, is used on a Gleeble 3800 simulator to obtain the forming limit curves (FLCs) and fracture forming limit curves (FFLCs) of a representative MMn (8Mn) steel. The localised necking strain and fracture strain are measured using a newly developed spatio-temporal method. The FLCs and FFLCs are constructed using strain limits in different loading states, e.g. uniaxial, plane strain and equi-biaxial stretching. The results show that the loading state conditions are acceptably simulated using the biaxial test system, and the FLCs and FFLCs are well-constructed, displaying a V shape. The data will contribute to the design of forming process. In addition, the forming strain limits of the MMn steel are much higher than those of a conventional boron steel (22MnB5) under the same hot stamping conditions, suggesting that the MMn steel has great potential and benefit as an alternative in hot stamping.
Date Issued
2023-08-20
Date Acceptance
2023-04-14
Citation
2023, pp.158-166
ISBN
9783031409196
ISSN
2195-4356
Publisher
Springer Nature Switzerland
Start Page
158
End Page
166
Journal / Book Title
Lecture Notes in Mechanical Engineering
Copyright Statement
© 2024 The Author(s), under exclusive license to Springer Nature Switzerland AG. This version of the article has been accepted for publication, after peer review (when applicable) and is subject to Springer Nature’s AM terms of use, but is not the Version of Record and does not reflect post-acceptance improvements, or any corrections. The Version of Record is available online at: http://dx.doi.org/10.1007/978-3-031-40920-2_17
Source
the 14th International Conference on the Technology of Plasticity - Current Trends in the Technology of Plasticity
Publication Status
Published
Start Date
2023-09-24
Finish Date
2023-09-29
Coverage Spatial
Mandelieu-La Napoule, France
Date Publish Online
2023-08-20