Characterization of the Bendability of Press-Hardened 22MnB5 Steel
SCIE
SCOPUS
- Title
- Characterization of the Bendability of Press-Hardened 22MnB5 Steel
- Authors
- Won Seok Choi; De Cooman, BC
- Date Issued
- 2014-05
- Publisher
- WILEY-VCH
- Abstract
- The bendability of press-hardened 22MnB5 steel was used as evaluation criterion to assess the ability of a press-hardened part to deform plastically in side impact crash conditions. The initiation sites of crack initiating shear bands during the bending operation of press-hardened 22MnB5 steel were found to be formed by surface roughening. Uncoated press-hardened 22MnB5 steel is subject to decarburization and oxidation phenomena occurring during austenitization. These surface processes were found to have a pronounced influence on the bendability of the steel, but their influence on the tensile properties was negligible. Decarburization has a positive influence on bendability by softening the outer sheet surface. Austenitization times prior to press forming in excess of 10min, resulted in the formation of a surface oxide layer which suppressed the continuation of the decarburization and resulted in the re-homogenization of the carbon concentration profile in the subsurface region. As a result, the decarburization layer was gradually removed, and the bendability of the press-hardened 22MnB5 steel was reduced.
- Keywords
- press hardening; 22MnB5; three point bending; decarburization; IRON-CARBON ALLOYS; TENSILE PROPERTIES; DECARBURIZATION; OXIDATION
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/14848
- DOI
- 10.1002/SRIN.201300276
- ISSN
- 1611-3683
- Article Type
- Article
- Citation
- Steel Research International, vol. 85, no. 5, page. 824 - 835, 2014-05
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- There are no files associated with this item.
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