Abstract Scope |
We have found that multi-principal CoFeNiAlSi alloys have such exceptional properties as a high yielding strength of 1,636 MPa, a high electrical resistivity of 68.0 μΩ cm, a high saturation induction of 1.24 Tesla, and a low coercivity of only 59.7 A/ m. In particularly, their total power loss can be lower than that of conventional Fe-Si alloys. In addition, we have found micron-/nano-scale hierarchical structures in a cast multi-principal VCrTiNi alloy, which has been often considered as a coarse-grained hydrogen storage alloy. The TiNi nanoprecipitates plays an essential role in the hydrogen storage behavior. Finally, we have found the enhanced phase stability of TiNi intermetallic compound nanoprecipitates in an irradiated multi-principal VCrTiNiPd alloy. The underlying mechanisms for these unique magnetism, hydriding, and irradiation behaviors are analyzed. Our work may give a guidance for designing new multi-principal element alloys with improved magnetism, hydriding, and irradiation performances. |