Abstract
In this article, orientation relationships (ORs) at martensite/austenite interface (M/A interface) transformed from coarse-grained and ultrafine-grained austenites were investigated. The results showed that the OR at the M/A interfaces of lenticular martensite transformed from coarse-grained austenite was close to Kurdjumov–Sachs (K–S). The OR of butterfly martensite was close to K–S in the outer side of M/A interface and it deviated to Nishiyama–Wasserman (N–W) at the inner side of M/A interface. In contrast, the OR of lenticular martensite transformed from ultrafine-grained austenite was close to Greninger–Troiano (G–T), and the OR of butterfly martensite was close to K–S at outer side of M/A interface and it deviated to G–T at the inner side of M/A interface. The significantly small size of martensite plate transformed from ultrafine-grained austenite resulted in the different ORs from coarse-grained austenite.
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Acknowledgement
This research was financially supported by the Grant-in-Aid for scientific research on innovative area, “Bulk Nanostructured Metals”, through Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan, (contract No. 22102002) and the support is gratefully acknowledged.
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Jafarian, H.R., Borhani, E., Shibata, A. et al. Martensite/austenite interfaces in ultrafine grained Fe–Ni–C alloy. J Mater Sci 46, 4216–4220 (2011). https://doi.org/10.1007/s10853-010-5018-y
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DOI: https://doi.org/10.1007/s10853-010-5018-y