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http://hdl.handle.net/10397/106350
Title: | Breaking the strength-ductility paradox in advanced nanostructured Fe-based alloys through combined Cu and Mn additions | Authors: | Kong, HJ Yang, T Chen, R Yue, SQ Zhang, TL Cao, BX Wang, C Liu, WH Luan, JH Jiao, ZB Zhou, BW Meng, LG Wang, A Liu, CT |
Issue Date: | Sep-2020 | Source: | Scripta materialia, Sept 2020, v. 186, p. 213-218 | Abstract: | The strength-ductility paradox is a long-sought challenge for all engineering materials. In this study, we escaped the strength-ductility trade-off by engineering nano-scale heterogeneities carefully in the advanced nanostructured Fe-based alloys through alloying with Cu and Mn additions. We demonstrated a triple ductility enhancement by 20% together with a strength improvement of 100MPa compared to the alloys with sole Cu additions, overturning a common understanding of the strength-ductility trade-off. The strength-ductility enhancement is attributed to the complex interplay between the transformation induced plasticity (TRIP) and the coherent nano-scale Cu precipitates as well as the resultant heterogeneous stress–strain partitioning and dislocation interactions. | Keywords: | Advanced nanostructured Fe-based alloys Grain boundary precipitation Nano-scale Cu precipitation Strength-ductility paradox Transformation induced plasticity (TRIP) |
Publisher: | Elsevier Ltd | Journal: | Scripta materialia | ISSN: | 1359-6462 | EISSN: | 1872-8456 | DOI: | 10.1016/j.scriptamat.2020.05.008 | Rights: | © 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. © 2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/. The following publication Kong, H. J., Yang, T., Chen, R., Yue, S. Q., Zhang, T. L., Cao, B. X., ... & Liu, C. T. (2020). Breaking the strength-ductility paradox in advanced nanostructured Fe-based alloys through combined Cu and Mn additions. Scripta Materialia, 186, 213-218 is available at https://doi.org/10.1016/j.scriptamat.2020.05.008. |
Appears in Collections: | Journal/Magazine Article |
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Jiao_Breaking_Strength-Ductility_Paradox.pdf | Pre-Published version | 1.08 MB | Adobe PDF | View/Open |
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