Singh, H., Alatarvas, T., Kistanov, A. A., Aravindh, S. A., Wang, S., Zhu, L., Sarpi, B., Niu, Y., Zakharov, A., de Groot, F. M. F., Huttula, M., Cao, W., & Fabritius, T. (2021). Unveiling interactions of non-metallic inclusions within advanced ultra-high-strength steel: A spectro-microscopic determination and first-principles elucidation. Scripta Materialia, 197, 113791. https://doi.org/10.1016/j.scriptamat.2021.113791
Unveiling interactions of non-metallic inclusions within advanced ultra-high-strength steel : a spectro-microscopic determination and first-principles elucidation
|Author:||Singh, Harishchandra1; Alatarvas, Tuomas2; Kistanov, Andrey A1;|
1Nano and Molecular Systems Research Unit, Centre for Advanced Steels Research, University of Oulu, FIN-90014, Finland
2Process Metallurgy Research Unit, Centre for Advanced Steels Research, University of Oulu, FIN-90014, Finland
3MAX IV Laboratory, Lund University, Lund 22484, Sweden
4Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, CG Utrecht 3584, the Netherlands
|Online Access:||PDF Full Text (PDF, 2.5 MB)|
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe2022032825685
|Publish Date:|| 2022-03-28
Determining non-metallic inclusions (NMIs) are essential to engineer ultra-high-strength steel as they play decisive role on performance and critical to probe via conventional techniques. Herein, advanced Synchrotron X-ray absorption coupled with photoemission electron microscopy and first-principles calculations are employed to provide the structure, local bonding structure and electronic properties of several NMI model systems and their interaction mechanism within and the steel matrix. B K-, N K-, Ca L2,3- and Ti L2,3-edge spectra show that the additional B prefers to result in h-BN exhibiting strong interaction with Ca²⁺. Such Ca²⁺-based phases also stabilize through TiN, revealing the irregular coordination of Ca²⁺. Observed intriguing no interaction between TiN and BN is further supported with the first-principles calculations, wherein unfavorable combination of TiN and h-BN and stabilization of bigger sized Ca²⁺-based inclusions have been found. These observations can help to optimize the interaction mechanism among various inclusions as well as steel matrix.
|Type of Publication:||
A1 Journal article – refereed
|Field of Science:||
114 Physical sciences
215 Chemical engineering
Authors acknowledge Academy of Finland grant #311934 for the financial support. We also thank the crew of the MAX IV laboratory for their support during the beamtime operation.
©2021 The Authors. Published by Elsevier Ltd on behalf of Acta Materialia Inc. This is an open access article under the CC BY license ( http://creativecommons.org/licenses/by/4.0/ ).