Development of high strength Fe-Cr-Ni-Al multiplex stainless steels as accident tolerant fuel cladding materials = 고강도 사고저항성 피복관용 Fe-Cr-Ni-Al 멀티플렉스 스테인리스강 개발

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Alumina-forming multiplex stainless steels were developed with a nominal composition range of Fe-(18–30)Ni-(16–24)Cr-(5–7)Al. Preliminary performance assessments including alloy design and high temperature steam oxidation were carried out for the screening of alloy compositions. A systematic evaluation between thermodynamic simulation (Thermo-Calc) and experimental results was performed along with 1200 ℃ steam thermogravimetric (TG) oxidation test. In addition, PWR autoclave corrosion behavior was analyzed for normal operation compatibility and hardness and tensile properties were assessed referring to ASTM standards. For the fabrication of cladding tube prototype, thermo-mechanical process was further engineered from the ingot melting to post heat-treatments conditions. As a result, austenite-ferrite duplex microstructure with nickel aluminide phase was obtained and forming chromia in normal operation and alumina at accident-line high temperature steam conditions, while providing high strength and excellent cold-fabricability.
Advisors
Jang, Changheuiresearcher장창희researcher
Description
한국과학기술원 :원자력및양자공학과,
Publisher
한국과학기술원
Issue Date
2019
Identifier
325007
Language
eng
Description

학위논문(박사) - 한국과학기술원 : 원자력및양자공학과, 2019.2,[vi, 64 p. :]

Keywords

Alloy development▼aaccident tolerant fuel cladding▼aalumina-forming duplex stainless steels▼anickel aluminide▼afuel cladding performance assessment▼afabricability evaluation; 합금 개발▼a사고저항성 핵연료 피복관▼a알루미나-생성 듀플렉스 스테인리스강▼a알루미나이드▼a피복관 필수성능 평가▼a가공성 평가

URI
http://hdl.handle.net/10203/265063
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=842181&flag=dissertation
Appears in Collection
NE-Theses_Ph.D.(박사논문)
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