Date of Graduation
Honors Research Project
Bachelor of Science
Corrosion Engineering - Cooperative Education
Dr. Rajeev Gupta
Dr. Scott Lillard
Dr. Qixin Zhou
The purpose of this project was to investigate thermal stability of high energy ball milled Al-5at.%Ni and Al-5at.%V alloys. Characterization was done by analyzing grain size and solid solubility. Samples were created using high energy ball milling, cold compaction to 3 GPa, and sintering from 100 °C to 500 °C at 100 °C increments, as well 450 °C and 614 °C. Microstructure, mechanical properties, and corrosion properties were determined using scanning electron microscopy, energy dispersive x-ray spectroscopy, x-ray diffraction, hardness testing, and cyclic potentiodynamic polarization. Vickers hardness of Al-5at.%Ni decreased with increasing temperature. For Al-at.%V, hardness increased with sintering temperature up to 300 °C before decreasing higher sintering temperatures. As sintering temperature increased, solid solubility of both alloying elements decreased, and grain size of both alloys increased. Corrosion testing was not conclusive due to limited repetition, but trended towards lower pitting potentials with lower hardness values and higher sintering temperatures. These findings follow previous research of Al-Cr alloys, and will be useful in future work to identify the optimal sintering temperature to create high strength, corrosion resistant aluminum alloys.
Wachowiak, Matthew G., "Effect of Sintering Temperature on Microstructure, Corrosion Behavior, and Hardness of Nanocrystalline Al-5at.%Ni and Al-5at.%V Alloys" (2017). Honors Research Projects. 512.