High damping capacity in a wide ambient-temperature range in hydrogen-doped and hydrogen-free Ti–45Pd–5Cr martensitic alloy

Alloys exhibiting high damping capacity in ambient-temperature range (250–400 K) are rare. Here it is reported that a martensitic alloy Ti–45Pd–5Cr shows twin-boundary-related high damping capacity over this temperature range. In the hydrogen-doped martensitic state, a relaxation-type high damping peak (Q−1 ≈ 0.09) exists, extending over 305–370 K. In the hydrogen-free martensitic state, there is a fascinating high-damping plateau (Q−1 ≈ 0.05) over 250–450 K. This work provides new insight into how to develop high damping alloys for the desired temperature range.