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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2017.1
- 수록면
- 43 - 53 (11page)
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초록· 키워드
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High-temperature tensile properties of three heat-resistant austenitic cast steels fabricated by varying W, Mo, and Al contents were interpreted by thermodynamically calculated equilibrium phase diagrams of austenite, ferrite, and carbides as well as microstructural analyses. A two-step calculation method was adopted to cast steel microstructures below the liquid dissolution temperature because the casting route was not an equilibrium state. Thermodynamically calculated fractions of equilibrium phases were well matched with experimentally measured fractions. Ferrites existed at room and high temperatures in both equilibrium phase diagrams and actual microstructures, which has not been reported in previous researches on austenitic cast steels. In the W2Mo1Al1 steel, 38% and 12% of ferrite existed in the equilibrium phase diagram and actual microstructure, respectively, and led to the void initiation and coalescence at ferrites and consequently to the serious deterioration of high-temperature strengths. The present equilibrium phase diagrams, besides detailed microstructural analyses, effectively evaluated the high-temperature performance by estimating high-temperature equilibrium phases, and provided an important idea on whether ferrite were formed or not in the heat-resistant austenitic cast steels.
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참고문헌 (49)
참고문헌 신청
R. D. Schuiling / 2010 / Int. J. Greenh. Gas Con 4:855
M. Meinshausen / 2009 / Nature 458:1158
D. Gielen / 2003 / Energ. Convers. Manage 44:1027
D. Gielen / 2002 / Energ. Policy 30:849
소태일 / 2015 / Effects of T6-Treatment on the Defect Susceptibility of Tensile Strength to Microporosity Variation in Low Pressure Die-Cast A356 Alloy / Metals and Materials International 21(5):842~849
M. Meinshausen / 2009 / Nature 458:1158
D. Gielen / 2003 / Energ. Convers. Manage 44:1027
D. Gielen / 2002 / Energ. Policy 30:849
소태일 / 2015 / Effects of T6-Treatment on the Defect Susceptibility of Tensile Strength to Microporosity Variation in Low Pressure Die-Cast A356 Alloy / Metals and Materials International 21(5):842~849
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