|About this Abstract
||Materials Science & Technology 2020
||Additive Manufacturing of Metals: Complex Microstructures and Architecture Design
||Control of Nanoscale Lamellae in Bulk Al-Cu Eutectic Samples Through Laser Powder Bed Fusion
||Jonathan M. Skelton, James Fitz-Gerald, Jerrold Floro
|On-Site Speaker (Planned)
||Jonathan M. Skelton
Eutectic alloys processed through laser powder bed fusion (LPBF) have recently generated interest as a potential class of high strength materials due to the high density of interphase interfaces that are produced. In this research, the relationship between LPBF processing parameters and the resulting microstructure of bulk Al-Cu eutectic samples is investigated as a model system. Specifically, effects of the laser velocity and power on the microstructural features such as the interphase spacing, colony width, melt pool boundary thickness, and lamellae and colony orientation are analyzed and discussed. This research demonstrates that control of the interphase spacing and microstructural orientation of eutectic alloys may be achieved through careful selection of the laser velocity and scan direction, allowing for fine tunability within each line scan, and providing potential design freedoms of bulk properties within the built part. Support for this research from the National Science Foundation grant #CMMI-1663085 is gratefully acknowledged.