Mechanical property changes during accelerated thermal aging embrittlement of cast stainless steel, CF-8A = 가속열취화로 인한 주조 스테인리스강, CF-8A의 기계적 특성 변화

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Thermal aging embrittlement of cast stainless steel CF-8A was evaluated by using miniature tensile specimens, Small Punch test and microstructural observation. Optical microscopic analysis, SEM and TEM observations have been carried out in this study. Aging phenomena of the ferrite phase has been identified by hardness measurements. With increase in aging time, changes in strength were observed but not in consistent manner. Despite of the decrease in strength after the prolonged aging at 400℃, no noticeable microstructural features were observed except a`` phase precipitation in ferrite by spinodal decomposition. For this material, miniature tensile tests were found to have limited applicability beyond yield strength. Small Punch test and other mechanical tests showed the changes of mechanical properties similar to those of the miniature tensile tests.
Advisors
Jang, Chang-Heuiresearcher장창희researcher
Description
한국과학기술원 : 원자력및양자공학과,
Publisher
한국과학기술원
Issue Date
2006
Identifier
255370/325007  / 020044355
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 원자력및양자공학과, 2006.2, [ vii, 55 p. ]

Keywords

Thermal Aging Embrittlement Stainless Steel; 가속열취화; 기계적 특성 변화; 주조 스테인리스강

URI
http://hdl.handle.net/10203/49505
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=255370&flag=dissertation
Appears in Collection
NE-Theses_Master(석사논문)
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