Zn-induced liquid metal embrittlement of galvanized high-Mn steel: Strain-rate dependency
SCIE
SCOPUS
- Title
- Zn-induced liquid metal embrittlement of galvanized high-Mn steel: Strain-rate dependency
- Authors
- Kang, J.-H.; Hong, S.-H.; Kim, J.; Kim, S.-J.
- Date Issued
- 2020-08-19
- Publisher
- ELSEVIER SCIENCE SA
- Abstract
- Zn-coated steel sheets suffer from Zn-induced liquid metal embrittlement (LME) during resistance spot welding and hot tensile deformation. By tensile testing at 700 and 800 degrees C, it was found that LME of an electro-galvanized high-Mn steel sheet was suppressed at low strain rate. Such strain-rate dependency of LME has been observed in various embrittlement metallic couples. Conventional ductile-to-brittle transition theory successfully explains the strain-rate reliance of LME in other embrittlement couples while it is invalid for Fe-Zn system. Owing to the high mutual solubility and several intermetallic compounds in Zn-rich regime of Fe-Zn system, the strain-rate dependency of Zn-induced LME was highly correlated with the existence of liquid Zn, which was verified by analyzing the cross section of the steel sheets.
- Keywords
- ASSISTED EMBRITTLEMENT; CRACK; WELDS
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/107848
- DOI
- 10.1016/j.msea.2020.139996
- ISSN
- 0921-5093
- Article Type
- Article
- Citation
- MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, vol. 793, 2020-08-19
- Files in This Item:
- There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.