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Fe-26Mn-4Co-2Al 제진합금의 감쇠능에 미치는 결정립 크기의 영향
정규성,김도훈,권순두,강창룡,Jeong, Kyu-Seong,Kim, Doe-Hoon,Kwon, Soon-Doo,Kang, Chang-Yong 한국재료학회 2018 한국재료학회지 Vol.28 No.3
This study was carried out to investigate the effect of grain size on the damping capacity of the Fe-26Mn-4Co-2Al damping alloy. ${\alpha}^{\prime}$ and ${\varepsilon}-martensite$ were formed by cold working, and these martensites were formed with a specific direction and surface relief. With an increase in grain size, the volume fraction of ${\alpha}^{\prime}$ and ${\varepsilon}-martensite$ increased by decrement the austenite phase stability. This volume fraction more rapidly increased in cold-rolled specimen than in the specimen that was not cold-rolled. The damping capacity also increased more with the augmentation an increased grain size and more rapidly increased in cold-rolled specimen than in the specimen that was not cold rolled. The effect of grain size on the damping capacity was larger in the cold-rolled specimen than the specimen that was not cold-rolled. Damping capacity linearly increased with an increase in volume fraction of ${\varepsilon}-martensite$. Thus, the damping capacity was affected by the ${\varepsilon}-martensite$.
반밀폐형 퓨즈의 차단용량 상승을 위한 Fe-Ni 합금 가용체의 형상 및 퓨즈링크 구조 설계
김성주(Seong-Ju Kim),김도훈(Doe-Hoon Kim),강창룡(Chang-Yong Kang) 대한전기학회 2018 전기학회논문지 Vol.67 No.5
According to a miniaturization and integration of electric device, a little size of fuse satisfying the current carrying capacity as well as an explosive tolerance and current interrupt rating are required. Fe-Ni alloy is applied to decrease an oxidation of fuse elements. A resistance and T.C.R(temperature coefficient of resistance) of a fuse are analyzed by changing a content of Ni And full rated current I-T curve from 1A to 6.3A has been tested. In order to an explosive energy, a straight wire type is selected to reduce a fuse melting time. An interrupt rating test was conducted by changing a content of Ni and the optimal content of Ni is to be 40%