Microstructures and properties of as-cast AlCrFeMnV, AlCrFeTiV, and AlCrMnTiV multi-principal element alloys
Abstract
This study reports on the as-cast microstructures of AlCrFeMnV, AlCrFeTiV, and AlCrMnTiV equimolar multi-principal element alloys. Thermodynamic modeling predicts that these alloys solidify as BCC solid solutions, with additional phases forming at lower temperatures. We present the measured densities, the elastic modulus values measured by nanoindentation, and the Vickers microhardness of the alloys. These properties are correlated to the underlying microstructures, as measured by x-ray diffraction, scanning electron microscopy, and atom-probe tomography. The densities of the alloys range from 5.53 to 6.42 ×103 kgm−3. The elastic modulus of AlCrFeMnV, AlCrFeTiV, and AlCrMnTiV are 211, 194, and 175 GPa, respectively, and their Vickers microhardness values are 3.9, 6.1, and 5.7 GPa, respectively. After arc-melting, AlCrFeMnV and AlCrFeTiV are BCC solid solutions while AlCrMnTiV has two phases: a BCC phase and a minor hexagonal C14 Laves phase that is enriched in V and Cr.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Mar 10, 2023
- Source ID
- 10.1063/5.0135276
Entities
People
- David Beaudry
- Keith E Knipling
- Lily Nguyen
- Pradyumna Narayana
Organizations
- Johns Hopkins University
- Office of Naval Research
- Thomas Jefferson High School for Science and Technology
- United States Naval Research Laboratory