Selective laser melting of 18Ni-300 maraging steel

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27230%2F20%3A10245610" target="_blank" >RIV/61989100:27230/20:10245610 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.mdpi.com/1996-1944/13/20/4557" target="_blank" >https://www.mdpi.com/1996-1944/13/20/4557</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/MA13194268" target="_blank" >10.3390/MA13194268</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Selective laser melting of 18Ni-300 maraging steel

Popis výsledku v původním jazyce

In the present study, 18% Ni 300 maraging steel powder was processed using a selective laser melting (SLM) technique to study porosity variations, microstructure, and hardness using various process conditions, while maintaining a constant level of energy density. Nowadays, there is wide range of utilization of metal technologies and its products can obtain high relative density. A dilatometry study revealed that, through heating cycles, two solid-state effects took place, i.e., precipitation of intermetallic compounds and the reversion of martensite to austenite. During the cooling process, one reaction took place (i.e., martensitic transformation), which was confirmed by microstructure observation. The improvements in the Rockwell hardness of the analyzed material from 42 +- 2 to 52 +- 0.5 HRC was improved as a result of aging treatment at 480 oC for 5 h. The results revealed that the relative density increased using laser speed (340 mm/s), layer thickness (30 μm), and hatch distance (120 μm). Relative density was found approximately 99.3%. Knowledge about the influence of individual parameters in the SLM process on porosity will enable potential manufacturers to produce high quality components with desired properties. (C) 2020 by the authors.

Název v anglickém jazyce

Selective laser melting of 18Ni-300 maraging steel

Popis výsledku anglicky

In the present study, 18% Ni 300 maraging steel powder was processed using a selective laser melting (SLM) technique to study porosity variations, microstructure, and hardness using various process conditions, while maintaining a constant level of energy density. Nowadays, there is wide range of utilization of metal technologies and its products can obtain high relative density. A dilatometry study revealed that, through heating cycles, two solid-state effects took place, i.e., precipitation of intermetallic compounds and the reversion of martensite to austenite. During the cooling process, one reaction took place (i.e., martensitic transformation), which was confirmed by microstructure observation. The improvements in the Rockwell hardness of the analyzed material from 42 +- 2 to 52 +- 0.5 HRC was improved as a result of aging treatment at 480 oC for 5 h. The results revealed that the relative density increased using laser speed (340 mm/s), layer thickness (30 μm), and hatch distance (120 μm). Relative density was found approximately 99.3%. Knowledge about the influence of individual parameters in the SLM process on porosity will enable potential manufacturers to produce high quality components with desired properties. (C) 2020 by the authors.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20300 - Mechanical engineering

Projekt

<a href="/cs/project/EF17_049%2F0008407" target="_blank" >EF17_049/0008407: Inovativní a aditivní technologie výroby - nová technologická řešení 3D tisku kovů a kompozitních materiálů</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název periodika

Materials

ISSN

1996-1944

e-ISSN

—

Svazek periodika

13

Číslo periodika v rámci svazku

19

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

13

Strana od-do

—

Kód UT WoS článku

000586574800001

EID výsledku v databázi Scopus

2-s2.0-85092436250