Measurement of thermal diffusivity of ion nitrided steel by flash method = 섬광 열확산 방법에 의한 이온 질화강의 열확산 계수 측정

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Thermal diffusivity of diffusion layer of ion-nitrided steel is experimentally determined by flash method. In the experiment, a high intensity heat pulse is irradiated to the front surface of a nitrided thin disk-shaped metal, and the transient temperature rise of the opposite surface is recorded. The termal diffusivity of the sample material is then determined from the recorded temperature transient versus time curve. The heat diffusion equation for the flash diffusivity method is solved assuming onedimensional heat flow, homogeneous material and uniform absorbing of the heat pulse at the front surface of a sample, and using heat pulse function which describes the actual pulse shape. A photodiode detecting system is used to find the actual pluse shape. A capacitor discharge percussion welding is used to reduce the damage of the juction area at the surface. It is found that thermal diffusivity of diffusion layer of nitrided steel increases up to 10\% of that of non-nitrided steel.
Advisors
Lee, Chung-OhresearcherLee, Hung-Jooresearcher이정오researcher이흥주researcher
Description
한국과학기술원 : 기계공학과,
Publisher
한국과학기술원
Issue Date
1979
Identifier
62519/325007 / 000771098
Language
eng
Description

학위논문 (석사) - 한국과학기술원 : 기계공학과, 1979.2, [ vi, 51 p. ]

URI
http://hdl.handle.net/10203/47036
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=62519&flag=dissertation
Appears in Collection
ME-Theses_Master(석사논문)
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