| About this Abstract |
| Meeting |
MS&T23: Materials Science & Technology
|
| Symposium
|
Light Metal Technology
|
| Presentation Title |
Phase Stability in Laser Melted Microstructures of Al-X (X=Zr, Nb, V) Alloys |
| Author(s) |
Alice E. Perrin, Weicheng Zhong , Ke An, Yuri Osetskiy, Alex Plotkowski, Kevin Sisco, Ying Yang |
| On-Site Speaker (Planned) |
Alice E. Perrin |
| Abstract Scope |
Three binary aluminum A-2.5at%X alloys (where X=Zr, V, Nb) were cast and processed with laser tracks to study how rapid solidification conditions affect the phase competition between the metastable L12 structure and the stable DO22/DO23 structures in Al3X compounds. Thin films of Al-25 at%X (X=Zr, Nb and V) were also sputtered and heat treated during in-situ x-ray diffraction (XRD) measurements to probe the phase transformations at a much a higher concentration of X. We found that the L12 structure is highly competitive with the DO23 structure in Al-Zr system, but much less stable than the DO22 structure in the Al-Nb and Al-V systems. We also identified the Al8V5 structure but with Al3V composition. These results were then correlated with DFT calculations on the stability of these phases and good agreement was observed. |