Metallurgical Abstracts on Light Metals and Alloys vol. 58

Alloy design and solidification microstructure of Ti-Zr-Hf-Ag-V multi-component alloys with a dual bcc structure

Takeshi Nagase*, Mitsuharu Todai**, Satoshi Ichikawa***, Aira Matsugaki**** and Takayoshi Nakano****
* Department of Materials and Synchrotron Radiation Engineering, Graduate School of Engineering, University of Hyogo
** Department of Environmental Materials Engineering, National Institute of Technology, Niihama College
*** Research Center for Ultra-High Voltage Electron Microscopy, Osaka University
**** Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University

[Published in Materials Transactions, Vol. 65 (2024), pp. 1041-1048]

https://doi.org/10.2320/matertrans.MT-MA2024009
E-mail: t-nagase[at]eng.u-hyogo.ac.jp
Key Words: high entropy alloys, metals and alloys, microstructure, solidification, liquid phase separation

TiZrHfAgV_0.2 (Ti_23.8Zr_23.8Hf_23.8Ag_23.8V_4.8, at%) high entropy alloys (HEAs) with a dual bcc structure were developed. Fine lamella structure was observed in the arc-melted ingots and melt-spun ribbons. The TiZrHfAgV_0.2 HEAs with a dual bcc phase structure were designed by exploiting the concept of immiscibility of the constituent elements. The immiscibility of the constituent elements in the multi-component alloys was discussed using the mixing enthalpy (Δ_i-j) matrix of the i-j elements, binary phase diagrams with liquid miscibility gap, and the thermodynamic calculations.