The effect of selective laser melting technology on the development of the structure of samples made from WC-Co powder

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23210%2F19%3A43955822" target="_blank" >RIV/49777513:23210/19:43955822 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.scientific-publications.net/get/1000036/1568822329619490.pdf" target="_blank" >https://www.scientific-publications.net/get/1000036/1568822329619490.pdf</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

The effect of selective laser melting technology on the development of the structure of samples made from WC-Co powder

Popis výsledku v původním jazyce

The aim of this study was to analyse how changing the processing parameters of WC-Co powder affects its properties. The powder mixture properties were evaluated by technological tests firstly and then the results were than compared with properties of SD251 stainless steel powder which is commonly processed by the technology of selective laser melting (SLM). Different laser powers and laser spot feed rates were used for different samples. As a result, different values for the applied energy density Ev were obtained. The changes in the density, porosity and changes in the chemical and structural compositions of the printed samples were then evaluated using light and electron microscopy. This evaluation was supplemented by X-ray diffraction analysis of the phase composition and evaluation of mechanical properties using hardness testing. These experiments allowed us, for example, to determine the dependence of the density of the samples on the applied energy Ev. The maximum density of the printed samples was about 70%. In addition, metallographic analysis and X-ray diffraction analysis revealed the development of the eta phase in the specimens, and how changing the parameters changes the type and number of pores in the volume of the printed samples.

Název v anglickém jazyce

The effect of selective laser melting technology on the development of the structure of samples made from WC-Co powder

Popis výsledku anglicky

The aim of this study was to analyse how changing the processing parameters of WC-Co powder affects its properties. The powder mixture properties were evaluated by technological tests firstly and then the results were than compared with properties of SD251 stainless steel powder which is commonly processed by the technology of selective laser melting (SLM). Different laser powers and laser spot feed rates were used for different samples. As a result, different values for the applied energy density Ev were obtained. The changes in the density, porosity and changes in the chemical and structural compositions of the printed samples were then evaluated using light and electron microscopy. This evaluation was supplemented by X-ray diffraction analysis of the phase composition and evaluation of mechanical properties using hardness testing. These experiments allowed us, for example, to determine the dependence of the density of the samples on the applied energy Ev. The maximum density of the printed samples was about 70%. In addition, metallographic analysis and X-ray diffraction analysis revealed the development of the eta phase in the specimens, and how changing the parameters changes the type and number of pores in the volume of the printed samples.

Druh

J_ost - Ostatní články v recenzovaných periodicích

CEP obor

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OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/TJ01000218" target="_blank" >TJ01000218: Výroba prototypového karbidického řezného nástroje aditivní technologií SLM</a><br>

Návaznosti

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

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

Journal of International Scientific Publications

ISSN

1314-7269

e-ISSN

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Svazek periodika

2019

Číslo periodika v rámci svazku

13

Stát vydavatele periodika

BG - Bulharská republika

Počet stran výsledku

10

Strana od-do

38-47

Kód UT WoS článku

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EID výsledku v databázi Scopus

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