- To develop, fabricate and investigate the hydrogen storage properties of TiVZrNb-Xi (Xi = Hf, W, Cr) based high entropy alloys.
- Step by step forming a research group on hydrogen storage materials.

- The results of the project show that several high entropy alloys have been successfully produced in this work. The as-cast alloys can be formed in the bcc single solid solution (in TiNbZrV, TiNbZrVHf0.5, TiNbZrVHf alloys) or dual phase comprising bcc main phase and Laves phase (in TiNbZrVW0.5, TiNbZrVCr0.5 và TiNbZrVCr alloys). All alloys show the typical dendrite structure in which the dendrites are bcc and the interdendrites are Laves phase (in the case of Laves phase formed). Compared to TiNbZrV alloy, the additions of Hf, W or Cr led to an improvement of alloy's hardness but also resulted in the more brittle, evidenced by the reduction of compressive ductility. The obtained alloys also show their ability to absorb hydrogen as well as hydrogen desorption, the maximum hydrogen uptake can reach 1.18 wt.% (for TiNbZrVHf0.5 alloy) with quickly desorption process. The obtained results of this project are the beginning steps for future work as well as skill straining in the field of hydrogen storage. 
- In addition, some of the results have been published in an international journal (SCI-E listed) and supervised for one PhD student.

- This work has successfully produced several high entropy alloys including the single bcc phase (in TiNbZrV, TiNbZrVHf0.5 and TiNbZrVHf alloys), dual phase with main bcc phase and a minor of  Laves phase  (in TiNbZrVW0.5, TiNbZrVCr0.5 and TiNbZrVCr alloys).
- Clarification on the room temperature mechanical properties and initial estimation of hydrogen storage properties of obtained high entropy alloys.  

- Publications:
Doan Dinh Phuong, Nguyen Van Toan, Phung Thi Hong Van, Dang Quoc Khanh, Karel Saksl and Tran Bao Trung, Effect of Hf concentration on the microstructure and room temperature mechanical properties of light-weight TiVZrNbHfx (x = 0 – 1.0) refractory high entropy alloys, Materials Transaction, https://doi.org/10.2320/matertrans.MT-M2023057.  
- Other products: supervised for one PhD student