Influence of Deposition Parameters on the Building rate, In-Situ Formation of Austenite and Tensile Properties of SAF 2507 SDSS Fabricated by Directed Energy Deposition

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26316919%3A_____%2F25%3AN0000026" target="_blank" >RIV/26316919:_____/25:N0000026 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60461373:22310/25:43933348

Výsledek na webu

<a href="https://doi.org/10.1007/s12540-025-01953-4" target="_blank" >https://doi.org/10.1007/s12540-025-01953-4</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s12540-025-01953-4" target="_blank" >10.1007/s12540-025-01953-4</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Influence of Deposition Parameters on the Building rate, In-Situ Formation of Austenite and Tensile Properties of SAF 2507 SDSS Fabricated by Directed Energy Deposition

Popis výsledku v původním jazyce

Industry applications of duplex stainless steels require a two-phase microstructure with a nearly balanced austenite-ferrite content to achieve good mechanical properties and good corrosion resistance. The most widespread additive manufacturing method such as laser powder bed fusion provides nearly fully ferritic microstructures due to the very high cooling rate, and the post-processing heat treatment must be performed. In contrast, other additive manufacturing methods, such as directed deposition methods, reach lower cooling rates and enable to obtain an equal ferrite-austenite ratio directly in the microstructure of the as-built state. In this work, the super duplex stainless steel SAF 2507 was deposited by directed energy deposition. The process parameters, namely, the laser power, laser beam spot, and powder feed rate, were varied to investigate the impact of the energy area density on the microstructure and tensile properties. A decrease in the energy area density caused an increase in the austenite content of 48 vol% and a numerical simulation of the sample temperature distribution inside the block during deposition, explaining the relationship between the amount of in situ formed austenite and the deposition parameters, was provided. Simultaneously, the deposition rate increased by more than five times. In contrast, the samples deposited at a higher building rate are characterized by greater porosity and lower elongation values in the vertical direction. The effect of the deposition parameters on the yield strength is low.

Název v anglickém jazyce

Influence of Deposition Parameters on the Building rate, In-Situ Formation of Austenite and Tensile Properties of SAF 2507 SDSS Fabricated by Directed Energy Deposition

Popis výsledku anglicky

Industry applications of duplex stainless steels require a two-phase microstructure with a nearly balanced austenite-ferrite content to achieve good mechanical properties and good corrosion resistance. The most widespread additive manufacturing method such as laser powder bed fusion provides nearly fully ferritic microstructures due to the very high cooling rate, and the post-processing heat treatment must be performed. In contrast, other additive manufacturing methods, such as directed deposition methods, reach lower cooling rates and enable to obtain an equal ferrite-austenite ratio directly in the microstructure of the as-built state. In this work, the super duplex stainless steel SAF 2507 was deposited by directed energy deposition. The process parameters, namely, the laser power, laser beam spot, and powder feed rate, were varied to investigate the impact of the energy area density on the microstructure and tensile properties. A decrease in the energy area density caused an increase in the austenite content of 48 vol% and a numerical simulation of the sample temperature distribution inside the block during deposition, explaining the relationship between the amount of in situ formed austenite and the deposition parameters, was provided. Simultaneously, the deposition rate increased by more than five times. In contrast, the samples deposited at a higher building rate are characterized by greater porosity and lower elongation values in the vertical direction. The effect of the deposition parameters on the yield strength is low.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20301 - Mechanical engineering

Projekt

<a href="/cs/project/EH23_021%2F0008433" target="_blank" >EH23_021/0008433: Vývoj speciálních drátových polotovarů pro svařování a 3D tisk</a><br>

Návaznosti

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

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

METALS AND MATERIALS INTERNATIONAL

ISSN

1598-9623

e-ISSN

2005-4149

Svazek periodika

31

Číslo periodika v rámci svazku

11

Stát vydavatele periodika

KR - Korejská republika

Počet stran výsledku

18

Strana od-do

3172-3189

Kód UT WoS článku

001493639900001

EID výsledku v databázi Scopus

2-s2.0-105006426174