The Influence of L-PBF Process Parameters with Platform Preheating on the Structure and Properties of Orthorhombic Titanium Aluminide Ti2AlNb Alloy
The result's identifiers
Result code in 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>
Result on the web
<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>
Alternative languages
Result language
angličtina
Original language name
The Influence of L-PBF Process Parameters with Platform Preheating on the Structure and Properties of Orthorhombic Titanium Aluminide Ti2AlNb Alloy
Original language description
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.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20500 - Materials engineering
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
JOM
ISSN
1047-4838
e-ISSN
1543-1851
Volume of the periodical
77
Issue of the periodical within the volume
12
Country of publishing house
US - UNITED STATES
Number of pages
13
Pages from-to
9760-9772
UT code for WoS article
001608269200001
EID of the result in the Scopus database
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