Zn Penetration in Liquid Metal Embrittled TWIP Steel
| Autor: | Heeseung Kang, Bruno C. De Cooman, Lawrence Cho, Chang-Wook Lee |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Materials science Metallurgy Twip Alloy Metals and Alloys 02 engineering and technology Penetration (firestop) Atom probe engineering.material 021001 nanoscience & nanotechnology Condensed Matter Physics Microstructure 01 natural sciences law.invention Mechanics of Materials law Liquid metal embrittlement 0103 physical sciences engineering Grain boundary diffusion coefficient Grain boundary 0210 nano-technology |
| Zdroj: | Metallurgical and Materials Transactions A. 47:2885-2905 |
| ISSN: | 1543-1940 1073-5623 |
| DOI: | 10.1007/s11661-016-3475-x |
| Popis: | Hot-dip Zn-coated high manganese twinning-induced plasticity (TWIP) steel is sensitive to liquid metal embrittlement (LME). The microstructure of Zn-coated TWIP steel after brittle fracture at 1123 K (850 °C) was investigated. The grain boundaries at the tip of the Zn penetration were analyzed by electron microscopy and atom probe tomography. Γ-(Fe,Mn)3Zn10 was found at the tip of the Zn penetration in the TWIP steel, implying that liquid Fe- and Mn-saturated Zn-rich alloy had percolated along the grain boundaries to the tip of the Zn penetration. Evidence for extensive Zn grain boundary diffusion ahead of the Zn-rich alloy percolation path was also observed. Both the Stoloff–Johnson–Westwood–Kamdar model and the Krishtal–Gordon–An model for LME crack formation are compatible with the present in-depth microanalysis of the Zn penetration. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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