Abstract
Detailed transmission electron microscopy examinations verified that α′-martensite formed in micron-sized pillars is nearly dislocation free, surprisingly different than its counterpart in bulk samples, which usually contains a high dislocation density. Furthermore, the martensite was found to nucleate at the intersection between two packets of stacking faults in this low stacking fault energy material. A corresponding mechanism for the nucleation and growth of martensite in micron-sized pillars was proposed.
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This work was partially supported by the Research Grants Council of the Hong Kong Special Administration Region, China (Project Nos. HKU 719712E and HKU 712713E) and the University Research Committee of HKU (Project No. 201111159053). The authors are grateful to Professor A.H.W. Ngan for providing the nanoindenter equipment.
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Manuscript submitted January 21, 2014.
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Wu, S.Z., Liang, Z.Y., He, B.B. et al. Martensitic Transformation in Micron-Sized Fcc Single Crystals. Metall Mater Trans A 45, 4731–4736 (2014). https://doi.org/10.1007/s11661-014-2467-y
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DOI: https://doi.org/10.1007/s11661-014-2467-y