Abstract
A preliminary study of the mechanical properties of Rh-based Ll2 intermetallic compounds Rh3Ti, Rh3Nb and Rh3Ta is carried out by micro-vickers hardness tests at room temperature and compression tests at various temperatures ranging from room temperature to 1673 K. A cold-rolling test is also conducted on a Rh3Ti plate. Although high temperature ductility-loss is observed in all compounds, Rh3Ti shows good ductility at all temperatures investigated. Both Rh3Nb and Rh3Ta show a weak positive temperature dependence of strength (stress anomaly) at around 1273 K which is about half the melting point for both intermetallic compounds. The stress anomaly is discussed in terms of a phase stability concept based on the Kear-Wilsdorf (K-W) mechanism. High work hardening rates of Rh3Nb and Rh3Ta, which cause high vickers hardness at room temperature, are also attributed to the K-W mechanism.
Original language | English |
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Pages (from-to) | 785-791 |
Number of pages | 7 |
Journal | Intermetallics |
Volume | 8 |
Issue number | 7 |
DOIs | |
Publication status | Published - 2000 Jul |
ASJC Scopus subject areas
- Chemistry(all)
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry