Feasibility study of high-strength and high-damping materials by means of hydrogen internal friction in amorphous alloys

Abstract Exploring the feasibility of high-strength and high-damping materials, we investigated the hydrogen internal friction peak (HIFP) in amorphous (a-) Zr 60 Cu 40− x Al x ( x =0, 5, 10) and a-Zr 40 Cu 50 Al 10 and the tensile strength, σ f , of a-Zr 60 Cu 30 Al 10 as a function of the hydrogen concentration. Results are discussed relative to the HIFP reported in a-Zr 50 Cu 50 , a-Zr 40 Cu 60 and a-Ti 50 Cu 50 . σ f of a-Zr 60 Cu 30 Al 10 increases from 1.5 GPa in the no-charged state to 2 GPa at about 15 at.% H. The HIFP in the a-alloys is observed as a very broad peak, where the peak temperature found varies from 350 K in a-Zr 40 Cu 60− x Al x with 1 at.% H to 200 K in a-Ti 50 Cu 50 with 15 at.%. Although the HIFP with the peak height, Q −1 peak , beyond 3×10 −2 is observed in a-Zr 60 Cu 40− x Al x ( x =0, 10) in the as charged state, its Q −1 peak shows a decrease after aging at 350 K due to the hydrogen induced structural relaxation (HISR). However, for all the present a-alloys, Q −1 peak observed in the thermally stable state after the HISR can be still as high as 2×10 −2 . The present results suggest that the hydrogen-charged a-alloys are potential high-strength and high-damping materials.