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Naslov:Fine martensite and beta-grain variational effects on mechanical properties of Ti–6Al–4V while laser parameters change in laser powder bed fusion
Avtorji:ID Pal, Snehashis (Avtor)
ID Bončina, Tonica (Avtor)
ID Lojen, Gorazd (Avtor)
ID Brajlih, Tomaž (Avtor)
ID Švara Fabjan, Erika (Avtor)
ID Gubeljak, Nenad (Avtor)
ID Finšgar, Matjaž (Avtor)
ID Drstvenšek, Igor (Avtor)
Datoteke:.pdf 1-s2.0-S0921509323014764-main.pdf (17,10 MB)
MD5: 01A6674A082542078237C4D79215303B
 
Jezik:Angleški jezik
Vrsta gradiva:Neznano
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:FS - Fakulteta za strojništvo
Ključne besede:martensite, Ti-6Al-4V, microstructure, tensile strenght, selective laser melting
Poslano v recenzijo:12.11.2023
Datum sprejetja članka:23.12.2023
Datum objave:25.12.2023
Založnik:Elsevier
Leto izida:2024
Št. strani:11 str.
Številčenje:Vol. 892
PID:20.500.12556/DKUM-86890 Novo okno
UDK:621.78:669.15
COBISS.SI-ID:179963395 Novo okno
DOI:10.1016/j.msea.2023.146052 Novo okno
ISSN pri članku:0921-5093
Avtorske pravice:© 2023 The Authors
Datum objave v DKUM:26.01.2024
Število ogledov:285
Število prenosov:22
Metapodatki:XML DC-XML DC-RDF
Področja:Ostalo
:
PAL, Snehashis, BONČINA, Tonica, LOJEN, Gorazd, BRAJLIH, Tomaž, ŠVARA FABJAN, Erika, GUBELJAK, Nenad, FINŠGAR, Matjaž in DRSTVENŠEK, Igor, 2024, Fine martensite and beta-grain variational effects on mechanical properties of Ti–6Al–4V while laser parameters change in laser powder bed fusion. Materials Science & Engineering. Structural materials: Properties, Microstructure and Processing [na spletu]. 2024. Vol. 892. [Dostopano 29 marec 2025]. DOI 10.1016/j.msea.2023.146052. Pridobljeno s: https://dk.um.si/IzpisGradiva.php?lang=slv&id=86890
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Gradivo je del revije

Naslov:Materials Science & Engineering. Structural materials: Properties, Microstructure and Processing
Skrajšan naslov:Mater. sci. eng., A Struct. mater. : prop. microstruct. process.
Založnik:Elsevier
ISSN:0921-5093
COBISS.SI-ID:25908992 Novo okno

Gradivo je financirano iz projekta

Financer:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Številka projekta:P2-0118
Naslov:Tekstilna kemija in napredni tekstilni materiali
Financer:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Številka projekta:P2-0137
Naslov:Numerična in eksperimentalna analiza nelinearnih mehanskih sistemov
Financer:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Številka projekta:P2-0157
Naslov:Tehnološki sistemi za pametno proizvodnjo
Financer:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Številka projekta:P2-0120
Naslov:Tehnologije metastabilnih materialov
Financer:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Številka projekta:J1-2470
Naslov:Biofunkcionalizacija 3D-tiskanih kovinskih zlitin kot novo nastajajoča strategija za zmanjšanje neželenih učinkov ortopedskih vsadkov
Financer:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Številka projekta:I0-0029
Naslov:Infrastrukturna dejavnost Univerze v Mariboru

Sekundarni jezik

Jezik:Slovenski jezik
Opis:In this study, several variations of Ti–6Al–4V β-grains and α′-martensites were observed while changing the combinations of laser parameters and keeping the energy density (ED) constant in the laser powder bed fusion (LPBF) process. Several combinations of laser power, scanning speed, and hatch spacing were considered, resulting in high product density between 99.3% and 100.0%. Accordingly, tensile specimens were fabricated to observe the above strategic fabrication and microstructural effects on tensile properties. At the same time, microhardness was also measured to observe the similarities. However, the size and shape of the β-grains differed significantly, while the scanning speed gradually decreased along with the laser power, with the shape changing from irregular to classically hexagonal and the size increasing sharply. Using the results of differential thermal analysis (DTA), it can be said that most of the tertiary and quaternary α′-martensites formed after the following few thermal cycles below 370 °C. Similarly, the α′-particles decomposed and formed β-particles due to thermal treatment at 370 °C. Therefore, a denser and higher number of tertiary and quaternary α′-martensites and a lower number of primary and secondary α′-martensites occurred, while the cooling rate decreased and the number of thermal cycles increased due to a lower scanning speed. These phenomena increased the hardness 370–395 HV and deteriorated the yield strength 1250-840 MPa. Changes in track overlap (hatch spacing) of 30–50% affect mechanical and microstructural characteristics more than track overlap of 10–25%. The columnar β-grains became longer and wider as the lane overlap increased from 30 to 50%. At the same time, some β-grains also changed to contain finer and fewer α′-martensites. These factors reduced both hardness and tensile properties.
Ključne besede:mikrostrukture, trdota, laserji


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