Abstract
Ti/Ta-reduced activation ferritic/martensitic (RAFM) steel used in this study composes one class of lath martensite that has a hierarchically-arranged crystallographic structure. Due to the multi-scale complexity in the microstructure, mechanical characterization at the appropriate level is required to understand the role of each hierarchical feature. In this study, uniaxial micro-pillar compression tests combined with rigorous crystal orientation analysis were performed to figure out the specific influences of the lath and sub-block boundaries on the plasticity in the lath martensite-structured Ti/Ta-RAFM steel. By conducting a postmortem slip trace analysis and comparing the critical resolved shear stress of each activated slip system, we confirmed that there is no strengthening effect from either the lath or sub-block boundaries.
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28 August 2019
This article was updated to include revised versions of Figures 3 and 4 that were overlooked during proof revisions.
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The authors acknowledge financial support from National Research Foundation of Korea (NRF-2019M2D2A1A02038972).
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The original version of this article was revised: to include revised version of figures 3 and 4 overlooked during the production process.
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Na, Ye., Jeong, W., Lee, MG. et al. Characterization of Plastic Deformation in Lath Martensitic Steel by Micro-pillar Compression Focused on Sub-block and Lath Boundaries. JOM 71, 3536–3542 (2019). https://doi.org/10.1007/s11837-019-03710-6
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DOI: https://doi.org/10.1007/s11837-019-03710-6