DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | Kwak, Byung-Man | - |
dc.contributor.advisor | 곽병만 | - |
dc.contributor.author | Gil, Young-Jun | - |
dc.contributor.author | 길영준 | - |
dc.date.accessioned | 2011-12-14T07:06:16Z | - |
dc.date.available | 2011-12-14T07:06:16Z | - |
dc.date.issued | 1981 | - |
dc.identifier.uri | http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=63103&flag=dissertation | - |
dc.identifier.uri | http://hdl.handle.net/10203/47074 | - |
dc.description | 학위논문(석사) - 한국과학기술원 : 기계공학과, 1981.2, [ iv, 81 p. ] | - |
dc.description.abstract | Flat narrow plates ion-nitrided on one side under various nitriding conditions are studied for the determination of mechanical properties of nitrided layers. The change of elastic modulus is calculated from deflection test of a cantilever set-up and the change of thermal expansion coefficient is obtained from curvature-temperature relation on the assumption that these changes are in proportion to the amount of nitrogen concentration, which is again to follow one-dimensional diffusion equation. It is found that the thermal expansion coefficient at the nitrided surface has been increased by 2 to 12% over the value of non-nitrided core, and elastic modulus at the nitrided surface has been increased by a maximum of 700%, whose value is dependent on the nitriding conditions. Also, the axial extension due to the diffused nitrogen into Fe lattice is found to be about $0.1×10^{-3}$ to $0.3×10^{-3}$ in terms of strain. Using the above results, the distribution of residual stress is obtained. At room temperature, the core has a low level of tensile stress having about 2 to 25kg/㎟, while the nitrided surface is in compression with a peak of about 50 to 200kg/㎟. | eng |
dc.language | eng | - |
dc.publisher | 한국과학기술원 | - |
dc.title | Determination of residual stress distribution in ion-nutrided steel | - |
dc.title.alternative | 이온 질화 처리 강에서의 잔류 응력 분포 결정 | - |
dc.type | Thesis(Master) | - |
dc.identifier.CNRN | 63103/325007 | - |
dc.description.department | 한국과학기술원 : 기계공학과, | - |
dc.identifier.uid | 000791021 | - |
dc.contributor.localauthor | Kwak, Byung-Man | - |
dc.contributor.localauthor | 곽병만 | - |
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