| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1498545 | Scripta Materialia | 2014 | 4 Pages |
Abstract
Zn-coated press-hardened steel, used for ultrahigh-strength structural parts of passenger cars, is sensitive to liquid-metal-induced embrittlement cracking during die quenching. The microstructure of the intergranular liquid-metal-induced cracks was analyzed in detail. A new model for crack formation is proposed. Intergranular cracking is due to the grain boundary penetration of a liquid Zn alloy phase along a crack tip propagating on prior austenite grain boundaries weakened by the Zn diffusion-mitigated phase transformation to ferrite.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Lawrence Cho, Heeseung Kang, Changwook Lee, Bruno C. De Cooman,