Abstract
Al-7Ce-3Ni-8Mg (wt%) alloys were fabricated by laser powder-bed fusion using blends of Al-7Ce-10Mg and either Raney (Al-50Ni) or Ni powders, and the microstructure and high-temperature mechanical properties of the resulting alloys were characterized. The effects of powder selection and process parameters on microstructural homogeneity were characterized via scanning electron microscopy studies: the highest compositional homogeneity was achieved using more dilute Raney powders (rather than pure Ni) with a laser-remelting scanning strategy. The printed Al-Ce-Ni-Mg alloys are strengthened by a eutectic network of Al11Ce3 and Al3Ni phases, and Mg in solid solution. The Al-7Ce-3Ni-8Mg alloys exhibit higher hardness during aging at 400 °C and higher creep resistance at 300 °C than Ni-free Al-Ce-Mg alloys, indicating a strengthening effect of Ni addition due to the increased volume fraction of eutectic phases.
| Original language | English |
|---|---|
| Article number | 147968 |
| Journal | Materials Science and Engineering: A |
| Volume | 926 |
| DOIs | |
| State | Published - Mar 2025 |
| Externally published | Yes |
Funding
The authors thank Dr. Jennifer Glerum for training in the preparation and printing of the powder blends, and Dr. Sumit Kewelramani for experimental assistance in the X-ray diffraction measurements. CNE was supported by the DEVCOM Army Research Laboratory (ARL) Research Associateship Program (RAP). Research was sponsored by the Army Research Laboratory and was accomplished under Cooperative Agreement Number W911NF-20–2–0292 and W911NF-21–2–02199 . The views and conclusions contained in this document are those of the authors and should not be interpreted as representing the official policies, either expressed or implied, of the Army Research Laboratory of the U.S. Government. The U.S. Government is authorized to reproduce and distribute reprints for Government purposes notwithstanding any copyright notation herein. This work made use of the MatCI Facility which receives support from the MRSEC Program (NSF DMR-2308691) of the Materials Research Center at Northwestern University. This work made use of the EPIC facility of Northwestern University’s NUANCE Center, which has received support from the SHyNE Resource (NSF ECCS-2025633), the IIN, and Northwestern's MRSEC program (NSF DMR-2308691). This work made use of the Jerome B. Cohen X-Ray Diffraction Facility supported by the MRSEC program of the National Science Foundation (DMR-2308691) at the Materials Research Center of Northwestern University and the Soft and Hybrid Nanotechnology Experimental ( SHyNE ) Resource (NSF ECCS-1542205.) The authors thank Dr. Jennifer Glerum for training in the preparation and printing of the powder blends, and Dr. Sumit Kewelramani for experimental assistance in the X-ray diffraction measurements. CNE was supported by the DEVCOM Army Research Laboratory (ARL) Research Associateship Program (RAP). Research was sponsored by the Army Research Laboratory and was accomplished under Cooperative Agreement Number W911NF-20–2–0292 and W911NF-21–2–02199. The views and conclusions contained in this document are those of the authors and should not be interpreted as representing the official policies, either expressed or implied, of the Army Research Laboratory of the U.S. Government. The U.S. Government is authorized to reproduce and distribute reprints for Government purposes notwithstanding any copyright notation herein. This work made use of the MatCI Facility which receives support from the MRSEC Program (NSF DMR-2308691) of the Materials Research Center at Northwestern University. This work made use of the EPIC facility of Northwestern University's NUANCE Center, which has received support from the SHyNE Resource (NSF ECCS-2025633), the IIN, and Northwestern's MRSEC program (NSF DMR-2308691). This work made use of the Jerome B. Cohen X-Ray Diffraction Facility supported by the MRSEC program of the National Science Foundation (DMR-2308691) at the Materials Research Center of Northwestern University and the Soft and Hybrid Nanotechnology Experimental (SHyNE) Resource (NSF ECCS-1542205.)