Damping Capacity of Co-Mn System
2003 年 44 巻 5 号 p. 931-934
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2003 年 44 巻 5 号 p. 931-934
The damping capacity of Co–Mn system which undergoes fcc → hcp martensitic transformation has been studied as a function of ε volume fraction using an inverted torsional pendulum. The damping capacity increases linearly with increasing ε volume fraction regardless of manganese content, and is represented by δ=0.05+0.27fε where δ is the damping capacity in logarithmic decrement of Co–Mn system and fε is the ε volume fraction. The main damping mechanism of Co–Mn system containing ε martensite is the movement of stacking fault boundaries in ε martensite plates.
