발간논문

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Vol.33, No.12, 1600 ~ 1609, 1995
Title
Effect of Cold Rolling on Damping Capacity of Fe - 23% Mn Alloy
전중환Joong Hwan Jun, 이영국Young Kook Lee, 최종술Chong Sool Choi
Abstract
Damping capacity and mechanical properties were investigated with respect to the amount of cold rolling for an Fe-23%Mn alloy. Maximum damping capacity was observed around 10% reduction at strain amplitude range of 2×10^(-4)∼4×10^(-4). The internal stacking faults in ε martensite plates are considered the most important damping source in this strain range. However, the strain amplitude range of 5×10^(-4)_∼6×10^(-4) higher than that showed the maximum damping capacity around 2% reduction. This means that γ/ε interface is the principal damping source in this strain range. Hardness increased continuously with the amount of deformation. Especially, when deformed at the range of 10%∼20%, the hardness increased steeply due to the work hardening as well as the stress-induced martensitic transformation. Mechanical properties such as yield strength and tensile strength were increased with the increase of cold work, but elongation showed reverse tendency. The 10% cold rolling showed the best combination of damping capacity and tensile strength.
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