| 1. |
Przygucki H., Dubey V., Durejko T.♦, Przygucka D.♦, Kowalewski Z. L., Jóźwiak S.♦, Kopeć M., Experimental identification of the yield surface for inconel alloys manufactured by using laser engineered net shaping,
International Journal od Advanced Manufacturing Technology, ISSN: 0268-3768, DOI: 10.1007/s00170-026-17839-7, pp.1-10, 2026 Streszczenie:
In this study, tubular specimens of Inconel 625 and Inconel 718 were additively manufactured using the Laser Engineered Net Shaping (LENS) technique. Their initial yield surfaces were experimentally determined under biaxial stress loading at 0.005% and 0.01% plastic offset strain. Uniaxial tensile tests showed yield strengths of 509 MPa and 461 MPa, with Young’s moduli of 180 GPa and 171 GPa for Inconel 625 and Inconel 718, respectively. Yield surfaces, fitted using the Szczepiński anisotropic criterion, revealed elliptical shapes with axis ratios below 1.73, confirming moderate anisotropy. Inconel 625 exhibited nearly symmetric yield strengths in tension and compression, with a higher tensile-direction elongation of the surface, whereas Inconel 718 showed stronger directional dependence, reflecting a higher degree of mechanical anisotropy. Słowa kluczowe:
Inconel, Yield surface, Additive manufacturing, Laser Engineered Net Shaping Afiliacje autorów:
| Przygucki H. | - | IPPT PAN | | Dubey V. | - | IPPT PAN | | Durejko T. | - | Military University of Technology (PL) | | Przygucka D. | - | inna afiliacja | | Kowalewski Z. L. | - | IPPT PAN | | Jóźwiak S. | - | Military University of Technology (PL) | | Kopeć M. | - | IPPT PAN |
|  | 100p. |
| 2. |
Gorniewicz D.♦, Przygucki H.♦, Kopeć M., Karczewski K.♦, Jóźwiak S.♦, TiCoCrFeMn (BCC + C14) high-entropy alloy multiphase structure analysis based on the theory of molecular orbitals,
Materials, ISSN: 1996-1944, DOI: 10.3390/ma14185285, Vol.14, No.18, pp.5285-1-16, 2021Streszczenie:
High-entropy alloys (HEA) are a group of modern, perspective materials that have been intensively developed in recent years due to their superior properties and potential applications in many fields. The complexity of their chemical composition and the further interactions of main elements significantly inhibit the prediction of phases that may form during material processing. Thus, at the design stage of HEA fabrication, the molecular orbitals theory was proposed. In this method, the connection of the average strength of covalent bonding between the alloying elements (Bo parameter) and the average energy level of the d-orbital (parameter Md) enables for a preliminary assessment of the phase structure and the type of lattice for individual components in the formed alloy. The designed TiCoCrFeMn alloy was produced by the powder metallurgy method, preceded by mechanical alloying of the initial elementary powders and at the temperature of 1050 °C for 60 s. An ultra-fine-grained structured alloy was homogenized at 1000 °C for 1000 h. The X-ray diffraction and scanning electron microscopy analysis confirmed the correctness of the methodology proposed as the assumed phase structure consisted of the body-centered cubic (BCC) solid solution and the C14 Laves phase was obtained. Słowa kluczowe:
HEA, solid solution, laves phase, U-FAST sintering Afiliacje autorów:
| Gorniewicz D. | - | Military University of Technology (PL) | | Przygucki H. | - | inna afiliacja | | Kopeć M. | - | IPPT PAN | | Karczewski K. | - | Military University of Technology (PL) | | Jóźwiak S. | - | Military University of Technology (PL) |
| | 140p. |
