Development of the Structure of Cemented Carbides during Their Processing by SLM and HIP

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26722445%3A_____%2F20%3AN0000025" target="_blank" >RIV/26722445:_____/20:N0000025 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/46747885:24620/20:00008049 RIV/49777513:23210/20:43960897

Výsledek na webu

<a href="https://www.mdpi.com/2075-4701/10/11/1477" target="_blank" >https://www.mdpi.com/2075-4701/10/11/1477</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/met10111477" target="_blank" >10.3390/met10111477</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Development of the Structure of Cemented Carbides during Their Processing by SLM and HIP

Popis výsledku v původním jazyce

The study focuses on microstructural evolution in a WC-Co powder mixture during Selective Laser Melting (SLM) and hot isostatic pressing (HIP) processing. This powder mixture contained a 13 +/- 0.6% weight fraction of Co binder and WC particles of mean size of 3.0 +/- 1.9 mu m. SLM of the mixture produced samples of various densities, depending on the volumetric energy density (VED) applied. High VED levels led to densities of up to 88%. The aspects affected by changes in VED included the pore density as well as the resulting types of phases and the size of WC phase particles. At high VED, the material began to develop cracks due to embrittlement. This had multiple causes: coarsening of alpha-phase (WC), evaporation of beta-phase (Co binder), and precipitation of eta-phase. At low VED levels, pores formed, typically of nonsymmetric shapes, with sizes larger than 500 mu m. Subsequent HIP processing led to an increased density, up to 96% of solid material. Contributions to this increased density were provided by structure transformations, namely, coarsening of alpha-phase by up to 1300% when compared to the powder grain size, and formation of eta-phase. The results provided a basis for steering further research to explore to a greater depth the SLM and HIP processing of selected WC-Co powder mixtures with as yet unused ranges of process parameters.

Název v anglickém jazyce

Development of the Structure of Cemented Carbides during Their Processing by SLM and HIP

Popis výsledku anglicky

The study focuses on microstructural evolution in a WC-Co powder mixture during Selective Laser Melting (SLM) and hot isostatic pressing (HIP) processing. This powder mixture contained a 13 +/- 0.6% weight fraction of Co binder and WC particles of mean size of 3.0 +/- 1.9 mu m. SLM of the mixture produced samples of various densities, depending on the volumetric energy density (VED) applied. High VED levels led to densities of up to 88%. The aspects affected by changes in VED included the pore density as well as the resulting types of phases and the size of WC phase particles. At high VED, the material began to develop cracks due to embrittlement. This had multiple causes: coarsening of alpha-phase (WC), evaporation of beta-phase (Co binder), and precipitation of eta-phase. At low VED levels, pores formed, typically of nonsymmetric shapes, with sizes larger than 500 mu m. Subsequent HIP processing led to an increased density, up to 96% of solid material. Contributions to this increased density were provided by structure transformations, namely, coarsening of alpha-phase by up to 1300% when compared to the powder grain size, and formation of eta-phase. The results provided a basis for steering further research to explore to a greater depth the SLM and HIP processing of selected WC-Co powder mixtures with as yet unused ranges of process parameters.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název periodika

Metals

ISSN

2075-4701

e-ISSN

2075-4701

Svazek periodika

10

Číslo periodika v rámci svazku

11

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

17

Strana od-do

1-17

Kód UT WoS článku

000593452500001

EID výsledku v databázi Scopus

2-s2.0-85095729127