Please use this identifier to cite or link to this item:
Title: Nanoscale insights into the damage tolerance of Cantor alloys at cryogenic temperatures
Authors: Ji, Weiming
Wu, Mao See
Keywords: Engineering::Mechanical engineering
Issue Date: 2022
Source: Ji, W. & Wu, M. S. (2022). Nanoscale insights into the damage tolerance of Cantor alloys at cryogenic temperatures. International Journal of Mechanical Sciences, 226, 107406-.
Project: RG155/19 (S) 
Journal: International Journal of Mechanical Sciences 
Abstract: High-entropy alloys deform plastically and may also be at risk to fracture in extreme environments. In this paper, the damage tolerance of nanocrystalline Cantor alloys under mode I loading at cryogenic temperatures is investigated via molecular dynamics. We find that the damage tolerance is improved significantly with the decrease of temperature, in contrast to conventional metals. Deformation mechanism maps are constructed to assess the plasticity based on the grain size and temperature. Results show that the plastic deformation is governed by a synergy of face-centered-cubic to hexagonal closed-packed martensite transformation, twinning, stacking fault formation, grain boundary (GB) plasticity, and especially dynamic recovery. Specifically, a crossover from shear localization to solid-state amorphization is identified with the decrease of temperature and grain size. The amorphization at GBs dissipates larger strain energy, leading to precursor retardation and hence a high damage tolerance. A final deformation mechanism map is constructed to combine the deformation mechanisms and the crossover pathway from localization to amorphization. This map has great implications on improving the damage tolerance of Cantor alloy at cryogenic temperatures.
ISSN: 0020-7403
DOI: 10.1016/j.ijmecsci.2022.107406
DOI (Related Dataset): 10.21979/N9/DG1D4H
Schools: School of Mechanical and Aerospace Engineering 
Rights: © 2022 Elsevier Ltd. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:MAE Journal Articles

Citations 20

Updated on Sep 23, 2023

Web of ScienceTM
Citations 20

Updated on Sep 28, 2023

Page view(s)

Updated on Sep 30, 2023

Google ScholarTM




Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.