• Title/Summary/Keyword: Non-Ferrous Damping Alloy

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Application of Fe-Mn High Damping Alloys for Reduction of Noise and Vibration in Power Plants (Fe-Mn 방진합금을 적용한 발전소 격납용기 살수펌프의 소음$\cdot$진동 저감효과에 관한 연구)

  • 백승한
    • Journal of KSNVE
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    • v.9 no.4
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    • pp.720-729
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    • 1999
  • Coventional methods for reducing vibration in engineering designs (i.e. by stifferning or detuning) may be undesirable in conditions where size or weight must be minimized, or where complex vibration spectra exist. Some alloys with a combination of high damping capacity and good mechanical properties can provide attractive techanical and economical solutions to problems involving seismic, shock and vibration isolation. Although several non ferrous damping alloys have been developed, none of those materials are applied in any industrial factor due largely to high production cost. To meet these requirement, we have developed a new Fe-Mn high damping alloy. In previous studies, we have reported that an Fe-17%Mn alloy exhibits the highest damping capacity(Specific Damping Capacity:SDC, 30%) among Fe-Mn binary system, and proposed that the boundaries of various types such as $\varepsilon$-martensite variant boundaries, stacking faults in $\varepsilon$-martensite, stacking faults in austenitic and ${\gamma}$$\gamma /\varepsilon$ interfaces give rise to a high damping capacity. The Fe-17%Mn alloy also has advantages of good mechanical properties(T.S. 70 kg/nm$^2$ and low cost over other damping alloys(1/4 times the cost of non-ferrous damping alloy). Thus, the Fe-17%Mn high damping alloy can be widely applied to household appliances, automobiles, industrial facilities and power plant components. In this paper, the overall properties of the Fe-17%Mn high damping alloy is introduced, and its applicability to containment spray pump in the power plant is discussed.

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Development of High Damping Alloys for Reduction of Noise and Vibration (소음.진동 제어를 위한 방진합금 개발)

  • Baik, Seung-Han;Kim, Jung-Chul;Han, Dong-Woon;Baik, Jin-Hyun;Kim, Tai-Hoon
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2004.11a
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    • pp.565-569
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    • 2004
  • Conventional methods for reducing vibration in engineering designs (i.e. by stiffening or detuning) may be undesirable or inadequate in conditions where size or weight must be minimized or where complex vibration spectra exist. Alloys which combine high damping capacity with good mechanical properties can provide attractive technical and economic solutions to problems involving seismic, shock and vibration isolation. To meet these trends, we have developed a new high damping Fe-17%Mn alloys. Also, the alloy has advantages of good mechanical properties and more economical than any other known damping alloys(1/4 times as cost of non-ferrous damping alloy). Thus, the high damping Fe-17%6Mn alloy can be widely applied to household appliances, automobiles, industrial facilities and power plant components with its excellent damping capacity(SDC, 30%) and mechanical property(T.S 700MPa). It is the purpose of this paper to introduce the characterization of the high damping Fe-17%Mn alloy and the results of retrofit several such applications.

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