Peierls barrier characteristic and anomalous strain hardening provoked by dynamic-strain-aging strengthening in a body-centered-cubic high-entropy alloy
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...
| Main Authors: | , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Taylor & Francis Group
2019-12-01
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| Series: | Materials Research Letters |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1080/21663831.2019.1658233 |
| _version_ | 1818192195610476544 |
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| author | 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 |
| author_facet | 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 |
| author_sort | S. Y. Chen |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-12-12T00:26:39Z |
| format | Article |
| id | doaj.art-bb85e9c7f3774e3eb05ada2aab90776a |
| institution | Directory Open Access Journal |
| issn | 2166-3831 |
| language | English |
| last_indexed | 2024-12-12T00:26:39Z |
| publishDate | 2019-12-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Materials Research Letters |
| spelling | doaj.art-bb85e9c7f3774e3eb05ada2aab90776a2022-12-22T00:44:36ZengTaylor & Francis GroupMaterials Research Letters2166-38312019-12-0171247548110.1080/21663831.2019.16582331658233Peierls barrier characteristic and anomalous strain hardening provoked by dynamic-strain-aging strengthening in a body-centered-cubic high-entropy alloyS. Y. Chen0L. Wang1W. D. Li2Y. Tong3K. K. Tseng4C. W. Tsai5J. W. Yeh6Y. Ren7W. Guo8J. D. Poplawsky9P. K. Liaw10The University of TennesseeThe University of TennesseeThe University of TennesseeThe University of TennesseeNational Tsing Hua UniversityNational Tsing Hua UniversityNational Tsing Hua UniversityArgonne National LaboratoryOak Ridge National LaboratoryOak Ridge National LaboratoryThe University of TennesseeThe 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.http://dx.doi.org/10.1080/21663831.2019.1658233Strain hardeningtemperature dependencedislocation widthserrated flowdynamic strain aging |
| spellingShingle | 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 Peierls barrier characteristic and anomalous strain hardening provoked by dynamic-strain-aging strengthening in a body-centered-cubic high-entropy alloy Materials Research Letters Strain hardening temperature dependence dislocation width serrated flow dynamic strain aging |
| title | Peierls barrier characteristic and anomalous strain hardening provoked by dynamic-strain-aging strengthening in a body-centered-cubic high-entropy alloy |
| title_full | Peierls barrier characteristic and anomalous strain hardening provoked by dynamic-strain-aging strengthening in a body-centered-cubic high-entropy alloy |
| title_fullStr | Peierls barrier characteristic and anomalous strain hardening provoked by dynamic-strain-aging strengthening in a body-centered-cubic high-entropy alloy |
| title_full_unstemmed | Peierls barrier characteristic and anomalous strain hardening provoked by dynamic-strain-aging strengthening in a body-centered-cubic high-entropy alloy |
| title_short | Peierls barrier characteristic and anomalous strain hardening provoked by dynamic-strain-aging strengthening in a body-centered-cubic high-entropy alloy |
| title_sort | peierls barrier characteristic and anomalous strain hardening provoked by dynamic strain aging strengthening in a body centered cubic high entropy alloy |
| topic | Strain hardening temperature dependence dislocation width serrated flow dynamic strain aging |
| url | http://dx.doi.org/10.1080/21663831.2019.1658233 |
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