Influence of annealing on microstructure and hydrogen storage properties of V48Fe12Ti15Cr25 alloy
Long Luo1,2, Xuan Bian1, Wen-yuan Wu1, Ze-ming Yuan2, Yong-zhi Li2, Ting-ting Zhai2, Feng Hu2
1 School of Metallurgy, Northeastern University, Shenyang 110819, Liaoning, China; 2 Analytical and Testing Center, Inner Mongolia Universityof Science and Technology, Baotou 014010, Inner Mongolia, China
Influence of annealing on microstructure and hydrogen storage properties of V48Fe12Ti15Cr25 alloy
Long Luo1,2, Xuan Bian1, Wen-yuan Wu1, Ze-ming Yuan2, Yong-zhi Li2, Ting-ting Zhai2, Feng Hu2
1 School of Metallurgy, Northeastern University, Shenyang 110819, Liaoning, China; 2 Analytical and Testing Center, Inner Mongolia Universityof Science and Technology, Baotou 014010, Inner Mongolia, China
摘要 V48Fe12Ti15Cr25 alloy was prepared using vacuum arc melting and was subsequently annealed for 10 h at 1273 K. The effects of annealing on the hydrogen storage properties and microstructure of the V48Fe12Ti15Cr25 alloys were investigated. The results indicated that the alloy consisted of main body-centered cubic, Ti-rich, and TiFe phases. After annealing, the kinetic properties of the alloy were improved but its hydrogen storage capacity was slightly reduced. The kinetic mechanisms of the hydrogen absorption and desorption of the alloys were studied. The dehydrogenation enthalpy of the alloy was decreased by2.57 kJ/mol after annealing. Differential scanning calorimetry indicated that the hydride decomposition temperature of the annealed alloy was decreased. The hydrogen desorption activation energies of the as-cast and annealed alloys were calculated to be 79.41 and 71.25 kJ/mol, respectively. The results illustrated that annealing was a beneficial method of improving the kinetic and thermodynamic properties of the hydrogen absorption/desorption of the alloy.
Abstract：V48Fe12Ti15Cr25 alloy was prepared using vacuum arc melting and was subsequently annealed for 10 h at 1273 K. The effects of annealing on the hydrogen storage properties and microstructure of the V48Fe12Ti15Cr25 alloys were investigated. The results indicated that the alloy consisted of main body-centered cubic, Ti-rich, and TiFe phases. After annealing, the kinetic properties of the alloy were improved but its hydrogen storage capacity was slightly reduced. The kinetic mechanisms of the hydrogen absorption and desorption of the alloys were studied. The dehydrogenation enthalpy of the alloy was decreased by2.57 kJ/mol after annealing. Differential scanning calorimetry indicated that the hydride decomposition temperature of the annealed alloy was decreased. The hydrogen desorption activation energies of the as-cast and annealed alloys were calculated to be 79.41 and 71.25 kJ/mol, respectively. The results illustrated that annealing was a beneficial method of improving the kinetic and thermodynamic properties of the hydrogen absorption/desorption of the alloy.
Long Luo,Xuan Bian,Wen-yuan Wu, et al. Influence of annealing on microstructure and hydrogen storage properties of V48Fe12Ti15Cr25 alloy[J]. Journal of Iron and Steel Research International, 2020, 27(2): 217-227.
2020, Vol. 27 
