Title: Deformation mechanisms in ultrahigh-strength and high-ductility nanostructured FeMnAlC alloy
Authors: Lin, Chih-Lung
Chao, Chuen-Guang
Juang, Jenh-Yih
Yang, Jenn-Ming
Liu, Tzeng-Feng
材料科學與工程學系
電子物理學系
Department of Materials Science and Engineering
Department of Electrophysics
Keywords: Metals and alloys;Nanostructured materials;Lightweight alloy;Spinodal decomposition;Bursting dislocation nucleation;Taylor lattice
Issue Date: 15-Feb-2014
Abstract: The deformation mechanisms of a bulk nanostructured Fe-30Mn-9.5Al-2.0C (in wt.%) alloy were investigated. After aging at 450 degrees C for 9-12 h, the alloy exhibits an exceptional strength-ductility combination (e. g. yield strength similar to 1406 MPa with elongation similar to 32%). The aged alloy exhibits a novel microstructure with isolated austenite nano-channels bounded by an extremely high volume fraction of directional nano-sized (Fe,Mn)(3)AlC carbides (kappa'-carbides). The plastic deformation was found to be dominated by bursting dislocation nucleation within the isolated austenite nano-channels. (C) 2013 Elsevier B. V. All rights reserved.
URI: http://dx.doi.org/10.1016/j.jallcom.2013.10.153
http://hdl.handle.net/11536/23579
ISSN: 0925-8388
DOI: 10.1016/j.jallcom.2013.10.153
Journal: JOURNAL OF ALLOYS AND COMPOUNDS
Volume: 586
Issue: 
Begin Page: 616
End Page: 620
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