DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | Jang, Changheui | - |
dc.contributor.advisor | 장창희 | - |
dc.contributor.author | Hong, Sunghoon | - |
dc.date.accessioned | 2018-06-20T06:20:32Z | - |
dc.date.available | 2018-06-20T06:20:32Z | - |
dc.date.issued | 2017 | - |
dc.identifier.uri | http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=675330&flag=dissertation | en_US |
dc.identifier.uri | http://hdl.handle.net/10203/243201 | - |
dc.description | 학위논문(석사) - 한국과학기술원 : 원자력및양자공학과, 2017.2,[iv, 57 p. :] | - |
dc.description.abstract | Three austenitic stainless steel welds (ASSW), such as E308, ER316L and ER347, with about 10 % of δ-ferrite were thermally aged at $400^\circ C$ up to 20,000 h to accelerate the thermal ageing expected in pressurized water reactor (PWR) environment. Fluctuation of Fe and Cr due to spinodal decomposition is observed with width of 5 - 12 nm within the ferrite phase. For all 3 welds, increase in strength and decrease in tensile elongation is observed after thermal aging at room temperature and $320^\circ C$. The reduction in fracture resistance, measured as J-R curves, is most significant for ER316L weld with decrease by about 61%. However, it is quite small (about 25 % decrease) for ER347 weld even after ageing at $400^\circ C$ for 20,000 h despite the large reduction in tensile elongation. Finally, the double loop-electrochemical potentiodynamic reactivation (DL-EPR) tests show the degree of sensitization (DOS) values are negligible even after the accelerated thermal ageing at $400^\circ C$ for 10,000 h. | - |
dc.language | eng | - |
dc.publisher | 한국과학기술원 | - |
dc.subject | austenitic stainless steel welds | - |
dc.subject | thermal ageing | - |
dc.subject | J-R curve | - |
dc.subject | sensitization | - |
dc.subject | mechanical properties | - |
dc.subject | 오스테나이트계 스테인리스강 용접부 | - |
dc.subject | 열취화 | - |
dc.subject | J-R 시험 | - |
dc.subject | 부식 특성 | - |
dc.subject | 기계적 물성 | - |
dc.title | Evaluation of the Effect of Thermal Ageing of Austenitic Stainless Steel Welds in PWRs | - |
dc.title.alternative | 가동 원전 오스테나이트계 스테인리스강 용접부의 열취화에 대한 영향 평가 | - |
dc.type | Thesis(Master) | - |
dc.identifier.CNRN | 325007 | - |
dc.description.department | 한국과학기술원 :원자력및양자공학과, | - |
dc.contributor.alternativeauthor | 홍성훈 | - |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.