| 1. |
Kopeć M., Przygucka D.♦, Sitek R.♦, Jóźwiak S.♦, Orientation-dependent low-cycle fatigue and grain boundary evolution in DMLS-fabricated Haynes 282 superalloy,
Manufacturing Letters, ISSN: 2213-8463, DOI: 10.1016/j.mfglet.2025.06.206, Vol.45, pp.1-8, 2025 Abstract:
This study investigates the effect of build orientation on the fatigue performance of Haynes 282 alloy manufactured via Direct Metal Laser Sintering at 0°, 45°, and 90°. Fatigue tests revealed superior service life for 0° and 45° orientations, attributed to equiaxed grains and high-angle grain boundaries identified by EBSD. Vertical builds exhibited columnar grains and reduced fatigue resistance. This work provides the first systematic correlation between grain boundary character and low-cycle fatigue behavior in DMLS-manufactured Haynes 282, expanding current understanding beyond Inconel-based systems and offering insights for orientation-based design optimization in critical high-temperature applications Keywords:
Nickel alloys, Fatigue, Additive manufacturing, Direct metal laser sintering (DMLS) Affiliations:
| Kopeć M. | - | IPPT PAN | | Przygucka D. | - | other affiliation | | Sitek R. | - | Warsaw University of Technology (PL) | | Jóźwiak S. | - | Military University of Technology (PL) |
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| 2. |
Kopeć M., Przygucka D.♦, Mierzejewska I., Sitek R.♦, Kowalewski Z.L., Jóźwiak S.♦, Effect of printing orientation on microstructure and fatigue behaviour of additively manufactured Haynes 282,
JOURNAL OF ALLOYS AND COMPOUNDS, ISSN: 0925-8388, DOI: 10.1016/j.jallcom.2025.181777, No.181777, pp.1-16, 2025Abstract:
In this study, Haynes 282 alloy bars were fabricated using Direct Metal Laser Sintering (DMLS) in three build orientations: 0°, 45°, and 90°. The process was conducted under an argon protective atmosphere with an energy density of 104 J/mm³, a laser power of 100 W, and a scanning speed of 800 mm/s. The additively manufactured (AM) specimens underwent fatigue testing at stress amplitudes ranging from ±550 MPa to ±800 MPa. Specimens printed at 0° and 45° showed significantly improved mechanical performance, indicating these orientations are more favorable. Notably, the AM specimens demonstrated extended service life at stress amplitudes below 700 MPa, highlighting the potential of DMLS for producing durable Haynes 282 components. Keywords:
Haynes 282,nickel alloys,fatigue,additive manufacturing,Direct Metal Laser Sintering (DMLS) Affiliations:
| Kopeć M. | - | IPPT PAN | | Przygucka D. | - | other affiliation | | Mierzejewska I. | - | IPPT PAN | | Sitek R. | - | Warsaw University of Technology (PL) | | Kowalewski Z.L. | - | IPPT PAN | | Jóźwiak S. | - | Military University of Technology (PL) |
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