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

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^*

^*Corresponding author for this work

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

34 Citations (Scopus)

27 Downloads (CityUHK Scholars)

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.

Original language	English
Pages (from-to)	475-481
Journal	Materials Research Letters
Volume	7
Issue number	12
Online published	27 Aug 2019
DOIs	https://doi.org/10.1080/21663831.2019.1658233
Publication status	Published - 2019
Externally published	Yes

Research Keywords

dislocation width
dynamic strain aging
serrated flow
Strain hardening
temperature dependence

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This full text is made available under CC-BY-NC 4.0. https://creativecommons.org/licenses/by-nc/4.0/

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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

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

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.",

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

author = "Chen, {S. Y.} and L. Wang and Li, {W. D.} and Y. Tong and Tseng, {K. K.} and Tsai, {C. W.} and Yeh, {J. W.} and Y. Ren and W. Guo and Poplawsky, {J. D.} and Liaw, {P. K.}",

year = "2019",

doi = "10.1080/21663831.2019.1658233",

language = "English",

volume = "7",

pages = "475--481",

journal = "Materials Research Letters",

issn = "2166-3831",

publisher = "Taylor & Francis",

number = "12",

}

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

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

TY - JOUR

T1 - Peierls barrier characteristic and anomalous strain hardening provoked by dynamic-strain-aging strengthening in a body-centered-cubic high-entropy alloy

AU - Chen, S. Y.

AU - Wang, L.

AU - Li, W. D.

AU - Tong, Y.

AU - Tseng, K. K.

AU - Tsai, C. W.

AU - Yeh, J. W.

AU - Ren, Y.

AU - Guo, W.

AU - Poplawsky, J. D.

AU - Liaw, P. K.

PY - 2019

Y1 - 2019

N2 - 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.

AB - 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.

KW - dislocation width

KW - dynamic strain aging

KW - serrated flow

KW - Strain hardening

KW - temperature dependence

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UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85071516269&origin=recordpage

U2 - 10.1080/21663831.2019.1658233

DO - 10.1080/21663831.2019.1658233

M3 - RGC 21 - Publication in refereed journal

SN - 2166-3831

VL - 7

SP - 475

EP - 481

JO - Materials Research Letters

JF - Materials Research Letters

IS - 12

ER -

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

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Research Keywords

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