High strain rate behaviour and mechanical properties of thermomechanically processed tungsten heavy alloy
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F25%3A10258836" target="_blank" >RIV/61989100:27360/25:10258836 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0925838825060748?pes=vor&utm_source=clarivate&getft_integrator=clarivate" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0925838825060748?pes=vor&utm_source=clarivate&getft_integrator=clarivate</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jallcom.2025.184512" target="_blank" >10.1016/j.jallcom.2025.184512</a>
Alternative languages
Result language
angličtina
Original language name
High strain rate behaviour and mechanical properties of thermomechanically processed tungsten heavy alloy
Original language description
Tungsten heavy alloys are favoured for demanding components subjected to extreme operating conditions. In this study we investigate experimentally and via numerical predictions the effects of rotary swaging performed at selected temperatures on the material plastic flow, (micro)structure, and room and high temperature quasistatic and dynamic mechanical behaviour of the WNiCo powder-based pseudo-alloy. The results showed that the green sintered piece featured superior plasticity, but relatively low strength across the variety of testing conditions (e.g. room temperature yield strength of 800 MPa). Swaging at 900 degrees C introduced dynamic recrystallization within the gamma-phase NiCo matrix but did not remarkably affect the W agglomerates; the softened matrix and W agglomerates featuring accumulated strain provided the pieces swaged at 900 degrees C with exceptional strength at room and elevated temperatures (room temperature yield strength of 1 650 MPa). On the other hand, swaging at 1 150 degrees C introduced softening within the W agglomerates and secondary recrystallization of the NiCo matrix, by the effect of which this piece featured both, enhanced plasticity and strength. According to the numerical predictions, increasing the swaging temperature also facilitated the plastic flow and homogenized the imposed strain. However, the piece swaged at 1 150 degrees C exhibited increased surface oxidation and thus deteriorated surface quality.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20500 - Materials engineering
Result continuities
Project
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Continuities
S - Specificky vyzkum na vysokych skolach
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Alloys and Compounds
ISSN
0925-8388
e-ISSN
1873-4669
Volume of the periodical
1044
Issue of the periodical within the volume
November 5
Country of publishing house
CH - SWITZERLAND
Number of pages
12
Pages from-to
184512
UT code for WoS article
001607784800016
EID of the result in the Scopus database
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