Journal
SCRIPTA MATERIALIA
Volume 137, Issue -, Pages 27-30Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2017.04.040
Keywords
Quenching and partitioning; Segregation; Microscopy and microanalysis techniques
Categories
Funding
- Research Program of the Materials innovation institute M2i [M41.10.11437]
- Tata Steel RDT
- European Research Council under the European Union's Seventh Framework Programme (FP7)/ERC grant [306292]
- Netherlands Organization for Scientific Research (NWO)
- Dutch Foundation of Applied Sciences (STW) through the Vidi-grant [12376]
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Quenching and partitioning (Q&P) process of a 03C-1.3Si-3.2Mn (wt%) steel with Mn segregation is studied experimentally and theoretically. During initial quenching a higher fraction of martensite forms in Mn-poor regions compared to Mn-rich regions. In the partitioning process, austenite in Mn-poor regions is surrounded with a higher fraction of martensite than austenite in Mn-rich regions and therefore receives a larger amount of carbon. When carbon partitioning is not sufficient to stabilize austenite, a higher fraction of martensite forms, during final quenching, in Mn-poor regions. Lowering the quenching temperature in the Q&P process reduces inhomogeneity in the distribution of phases. (C) 2017 Acta Materialia Inc Published by Elsevier Ltd. All rights reserved.
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