The Influence of L-PBF Process Parameters with Platform Preheating on the Structure and Properties of Orthorhombic Titanium Aluminide Ti2AlNb Alloy

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F25%3A10258903" target="_blank" >RIV/61989100:27360/25:10258903 - isvavai.cz</a>

Výsledek na webu

<a href="https://link.springer.com/article/10.1007/s11837-025-07840-y" target="_blank" >https://link.springer.com/article/10.1007/s11837-025-07840-y</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s11837-025-07840-y" target="_blank" >10.1007/s11837-025-07840-y</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The Influence of L-PBF Process Parameters with Platform Preheating on the Structure and Properties of Orthorhombic Titanium Aluminide Ti2AlNb Alloy

Popis výsledku v původním jazyce

The additive manufacturing of hard-to-process intermetallics, such as the Ti-23Al-25Nb alloy (O-alloy), poses significant challenges but is critical for expanding their industrial applications. This study identifies the optimum laser powder bed fusion (L-PBF) parameters, build platform temperature, and aging treatment required to produce high-performance, crack-free O-alloy for demanding applications. The effect of L-PBF process parameters, including platform preheat temperature and subsequent aging treatment on the relative density, defects, microstructure, phase composition, and mechanical properties of orthorhombic titanium aluminide, Ti2AlNb, is investigated. Build platform preheating at 600 degrees C and high volumetric energy density (VED) in the range of 37-139 J/mm3 results in a keyhole porosity and cracking due to excessive energy input. Increasing the substrate temperature to 700 degrees C, under optimized process parameters with VED in the range of 22-37 J/mm3, produces a crack-free build with a relative density of 99.7%. A reduction in laser scanning speed increases the fraction of the O-phase, thereby enhancing the high-temperature strength. In addition, post-aging treatment at 800 degrees C for 30 min improved the strength and ductility of the O-alloy at room and elevated testing temperatures of 600 and 700 degrees C. The effect of microstructure on the mechanical properties of the O-alloy is discussed.

Název v anglickém jazyce

The Influence of L-PBF Process Parameters with Platform Preheating on the Structure and Properties of Orthorhombic Titanium Aluminide Ti2AlNb Alloy

Popis výsledku anglicky

The additive manufacturing of hard-to-process intermetallics, such as the Ti-23Al-25Nb alloy (O-alloy), poses significant challenges but is critical for expanding their industrial applications. This study identifies the optimum laser powder bed fusion (L-PBF) parameters, build platform temperature, and aging treatment required to produce high-performance, crack-free O-alloy for demanding applications. The effect of L-PBF process parameters, including platform preheat temperature and subsequent aging treatment on the relative density, defects, microstructure, phase composition, and mechanical properties of orthorhombic titanium aluminide, Ti2AlNb, is investigated. Build platform preheating at 600 degrees C and high volumetric energy density (VED) in the range of 37-139 J/mm3 results in a keyhole porosity and cracking due to excessive energy input. Increasing the substrate temperature to 700 degrees C, under optimized process parameters with VED in the range of 22-37 J/mm3, produces a crack-free build with a relative density of 99.7%. A reduction in laser scanning speed increases the fraction of the O-phase, thereby enhancing the high-temperature strength. In addition, post-aging treatment at 800 degrees C for 30 min improved the strength and ductility of the O-alloy at room and elevated testing temperatures of 600 and 700 degrees C. The effect of microstructure on the mechanical properties of the O-alloy is discussed.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

20500 - Materials engineering

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

JOM

ISSN

1047-4838

e-ISSN

1543-1851

Svazek periodika

77

Číslo periodika v rámci svazku

12

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

13

Strana od-do

9760-9772

Kód UT WoS článku

001608269200001

EID výsledku v databázi Scopus

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