Adjusting recrystallization kinetics of WNiCo alloy by intensive shear strain

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F25%3A10257642" target="_blank" >RIV/61989100:27360/25:10257642 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0263436825001842?pes=vor&utm_source=scopus&getft_integrator=scopus" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0263436825001842?pes=vor&utm_source=scopus&getft_integrator=scopus</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.ijrmhm.2025.107219" target="_blank" >10.1016/j.ijrmhm.2025.107219</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Adjusting recrystallization kinetics of WNiCo alloy by intensive shear strain

Popis výsledku v původním jazyce

The study investigates the effects of intensive shear strain processing, performed by selected regimes of rotary swaging, on recrystallization kinetics and deformation behaviour of a WNiCo tungsten heavy alloy. The results of uniaxial hot compression tests and thorough microstructure observations indicate that the selected rotary swaging regime, especially the swaging temperature, influences significantly not only the occurrence and development of dynamic hardening/softening processes, which consequently influence the flow stress, but also the recrystallization kinetics as such. The deformation temperature of 1100 °C was sufficient to initiate dynamic recrystallization in the Ni[sbnd]Co matrix, the average grain size within which decreased down to 1.9 μm. The deformation temperature of 1200 °C caused further softening within the matrix and intensified its plastic flow, which also supported joining of W agglomerates. Particularly the high swaging temperatures in combination with high strain rates (100 s−1) imparted flow stress maxima exceeding 1100 MPa. From the computational perspective, the complex effect of the occurring structure-forming phenomena on the behaviour of the WNiCo alloy was mapped by creating a rheological model, predicting its flow stress development under a wide range of temperatures. The rheological model was created via a regression analysis on the experimental data, and can serve as a basis for prospective numerical simulations using the finite element method. © 2025

Název v anglickém jazyce

Adjusting recrystallization kinetics of WNiCo alloy by intensive shear strain

Popis výsledku anglicky

The study investigates the effects of intensive shear strain processing, performed by selected regimes of rotary swaging, on recrystallization kinetics and deformation behaviour of a WNiCo tungsten heavy alloy. The results of uniaxial hot compression tests and thorough microstructure observations indicate that the selected rotary swaging regime, especially the swaging temperature, influences significantly not only the occurrence and development of dynamic hardening/softening processes, which consequently influence the flow stress, but also the recrystallization kinetics as such. The deformation temperature of 1100 °C was sufficient to initiate dynamic recrystallization in the Ni[sbnd]Co matrix, the average grain size within which decreased down to 1.9 μm. The deformation temperature of 1200 °C caused further softening within the matrix and intensified its plastic flow, which also supported joining of W agglomerates. Particularly the high swaging temperatures in combination with high strain rates (100 s−1) imparted flow stress maxima exceeding 1100 MPa. From the computational perspective, the complex effect of the occurring structure-forming phenomena on the behaviour of the WNiCo alloy was mapped by creating a rheological model, predicting its flow stress development under a wide range of temperatures. The rheological model was created via a regression analysis on the experimental data, and can serve as a basis for prospective numerical simulations using the finite element method. © 2025

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

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

International Journal of Refractory Metals and Hard Materials

ISSN

0263-4368

e-ISSN

2213-3917

Svazek periodika

131

Číslo periodika v rámci svazku

107219

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

12

Strana od-do

nestránkováno

Kód UT WoS článku

001490321700002

EID výsledku v databázi Scopus

2-s2.0-105004263897