| Title |
Effect of Process Parameters on Interfacial Reaction and Mechanical Properties of AlSi10Mg and Inconel 625 Joints during Laser Direct Energy Deposition |
| Authors |
박찬호(Chanho Park); 박민수(Minsu Park); 조해주(Haeju Jo); 이욱진(Wookjin Lee) |
| DOI |
https://doi.org/10.3365/KJMM.2025.63.6.410 |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Keywords |
Directed Energy Deposition; Dissimilar Metal Joining; AlSi10Mg; Inconel 625; Interfacial Reaction; Mechanical Properties |
| Abstract |
The joining of Ni/Al dissimilar metals to exploit the synergetic effect between the unique properties of Ni and Al alloys has been studied for potential applications in various industrial areas. This study investigates the interfacial reaction between deposited AlSi10Mg and an Inconel 625 substrate during the laser direct energy deposition (L-DED) process. Samples were fabricated with the L-DED process with five different laser process parameters. The effects of the different L-DED process parameters on the microstructure, chemical composition, and mechanical properties of the interface were analyzed. The results showed that as the volumetric energy density (VED) increased, the intermetallic compound (IMC) phase became thicker, and defects such as cracks tended to occur. An energy dispersive spectrometer analysis exhibited the formation of two different IMC phases, Al3Ni5 and NiAl, at the interface. Tensile tests demonstrated that as the VED was decreased, the tensile interfacial strength increased due to the thinner IMC interlayer and fewer interfacial defects. Although the interface showed lower tensile strength compared to L-DED processed AlSi10Mg and Inconel 625, it exhibited reliable tensile interfacial strength, in the range of 11 - 34 MPa. The results demonstrate that an adequately low VED can produce a dissimilar joint between AlSi10Mg and Inconel 625 with a defect-less interface. This approach is expected to be beneficial for the Ni- Al multi-material L-DED process and for producing Ni and Al dissimilar joint structures.(Received 12 March, 2025; Accepted 15 April, 2025) |