High strain rate behaviour and mechanical properties of thermomechanically processed tungsten heavy alloy

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

High strain rate behaviour and mechanical properties of thermomechanically processed tungsten heavy alloy

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

High strain rate behaviour and mechanical properties of thermomechanically processed tungsten heavy alloy

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

20500 - Materials engineering

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Alloys and Compounds

ISSN

0925-8388

e-ISSN

1873-4669

Svazek periodika

1044

Číslo periodika v rámci svazku

November 5

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

12

Strana od-do

184512

Kód UT WoS článku

001607784800016

EID výsledku v databázi Scopus

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