Peierls barrier characteristic and anomalous strain hardening provoked by dynamic-strain-aging strengthening in a body-centered-cubic high-entropy alloy

S. Y. Chen; L. Wang; W. D. Li; Y. Tong; K. K. Tseng; C. W. Tsai; J. W. Yeh; Y. Ren; W. Guo; J. D. Poplawsky; P. K. Liaw

doi:10.1080/21663831.2019.1658233

Author(s)

S. Y. Chen
L. Wang
W. D. Li
Y. Tong
K. K. Tseng
C. W. Tsai
J. W. Yeh
W. Guo
J. D. Poplawsky
P. K. Liaw

Detail(s)

Original language	English
Pages (from-to)	475-481
Journal / Publication	Materials Research Letters
Volume	7
Issue number	12
Online published	27 Aug 2019
Publication status	Published - 2019
Externally published	Yes

Link(s)

DOI	DOI https://doi.org/10.1080/21663831.2019.1658233 Final Published version
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Attachment(s)	Documents 83687734.pdf Final Published version, 2.55 MB, PDF Publisher's Copyright Statement This full text is made available under CC-BY-NC 4.0. https://creativecommons.org/licenses/by-nc/4.0/
Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-85071516269&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(31fb8ee6-60f0-4be3-8bfc-13a5b5d482c2).html

Abstract

The temperature effect on the mechanical behavior of the HfNbTaTiZr high entropy alloy (HEA) was investigated at 77–673 K. The decrease of the yield strength with increasing the temperature was mechanistically analyzed by considering contributions from various strengthening mechanisms. An anomalous dependence of strain hardening on temperature was observed and was justified to be caused by dynamic strain aging (DSA) as an extra strengthening mechanism at elevated temperatures. A model was constructed to split the overall strain hardening into forest hardening and DSA hardening, both of which were theoretically quantified at all temperatures considered.

Research Area(s)

dislocation width, dynamic strain aging, serrated flow, Strain hardening, temperature dependence

Citation Format(s)

[ RIS ] [ BibTeX ]

Peierls barrier characteristic and anomalous strain hardening provoked by dynamic-strain-aging strengthening in a body-centered-cubic high-entropy alloy. / Chen, S. Y.; Wang, L.; Li, W. D. et al.
In: Materials Research Letters, Vol. 7, No. 12, 2019, p. 475-481.

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

Chen, SY, Wang, L, Li, WD, Tong, Y, Tseng, KK, Tsai, CW, Yeh, JW, Ren, Y, Guo, W, Poplawsky, JD & Liaw, PK 2019, 'Peierls barrier characteristic and anomalous strain hardening provoked by dynamic-strain-aging strengthening in a body-centered-cubic high-entropy alloy', Materials Research Letters, vol. 7, no. 12, pp. 475-481. https://doi.org/10.1080/21663831.2019.1658233

Chen, S. Y., Wang, L., Li, W. D., Tong, Y., Tseng, K. K., Tsai, C. W., Yeh, J. W., Ren, Y., Guo, W., Poplawsky, J. D., & Liaw, P. K. (2019). Peierls barrier characteristic and anomalous strain hardening provoked by dynamic-strain-aging strengthening in a body-centered-cubic high-entropy alloy. Materials Research Letters, 7(12), 475-481. https://doi.org/10.1080/21663831.2019.1658233

Chen SY, Wang L, Li WD, Tong Y, Tseng KK, Tsai CW et al. Peierls barrier characteristic and anomalous strain hardening provoked by dynamic-strain-aging strengthening in a body-centered-cubic high-entropy alloy. Materials Research Letters. 2019;7(12):475-481. Epub 2019 Aug 27. doi: 10.1080/21663831.2019.1658233

Chen, S. Y. ; Wang, L. ; Li, W. D. et al. / Peierls barrier characteristic and anomalous strain hardening provoked by dynamic-strain-aging strengthening in a body-centered-cubic high-entropy alloy. In: Materials Research Letters. 2019 ; Vol. 7, No. 12. pp. 475-481.

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