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Compressive deformation of MoAIB up to 1100 degrees C
Journal article   Open access   Peer reviewed

Compressive deformation of MoAIB up to 1100 degrees C

Yexiao Chen, Sankalp Kota, Michel W. Barsoum and Miladin Radovic
Journal of alloys and compounds, v 774, pp 1216-1222
05 Feb 2019
DOI: https://doi.org/10.1016/j.jallcom.2018.09.124
url
https://doi.org/10.1016/j.jallcom.2018.09.124View
Accepted (AM)Maybe Open Access (Publisher Bronze),  Open

Abstract

Chemistry Chemistry, Physical Materials Science Materials Science, Multidisciplinary Metallurgy & Metallurgical Engineering Physical Sciences Science & Technology Technology
Quasi-static and cyclic compression tests at room and high temperatures were conducted on MoAIB, which has an atomically laminated structure that consists of a Mo-B sublattice interleaved by double layers of pure Al. The results show that MoAIB goes through a brittle-to-plastic transition (BPT) at around 800 degrees C. Below the BPT temperature, MoAIB behaves as a linear-elastic solid and fails in a brittle manner at stresses exceeding 2 GPa despite the fact that the grain size was 6 +/- 1 mu m. While post-testing microstructural observation showed only a few bends and kinks of individual grains, extensive microcracking was observed. Above the BPT temperature, the deformation was non-linear elastic with open stressstrain hysteresis loops and small irrecoverable strains after each loading-unloading cycle. This behavior was attributed predominantly to micocracks that appear to be constrained mostly within a shear band and coalesce into larger cracks. (C) 2018 Elsevier B.V. All rights reserved.

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Domestic collaboration
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Chemistry, Physical
Materials Science, Multidisciplinary
Metallurgy & Metallurgical Engineering
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