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초록· 키워드
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High temperature deformation behavior of a Ni₃?Fe?₃Co₁? alloy, with its extraordinary low coefficient of thermal expansion less than 10×10??K?¹ at temperatures ranging from room temperature to 673K, was investigated by conducting a series of compression tests. From an empirical processing map, the appropriate working temperature-strain rate combination for optimum forming was deduced to be in the ~1373K, 10?²s?¹ region. This region has a relatively high power dissipation efficiency, greater than 0.36. Furthermore, open die forging of a 100㎜ diameter billets was performed to confirm the variation of thermo-physical properties in relation to microstructure. The coefficient of thermal expansion was found to increase considerably with increasing the open die forging temperature and decreasing the cooling rate, which in turn provides a drastic increase in the average grain size.
목차
Abstract
1. 서론
2. 실험 방법
3. 고온 압축 변형 거동
4. 자유 단조 공정변수-열물리적 특성 관계
5. 결론
참고문헌
참고문헌 (13)
참고문헌 신청
1. [학술지(정기간행물)] - G. W. Liu / 2010 / SiC/SiC and SiC/Kovar Joining by Ni-Si and Mo Interlayers / J. Mater. Sci 45 (16) : 4299 ~ 4307
2. [학술지(정기간행물)] - H.W. Carpenter / 1976 / Alloy 903 Helps Space Shuttle Ply / Met. Prog 110 (3) : 25 ~ 29
3. [학술지(정기간행물)] - S. Wang / 1991 / Microstructure and Mechanical Properties of Fe-Ni-Co-based Superalloy after Longterm aging at 650oC / Acta Metall. Sinica 4 (3) : 194 ~ 198
4. [학술지(정기간행물)] - 이기안 / 2003 / Fe-Ni-Co 저열팽창성 합금의 고온 변형 특성 및 열간가공에 따른 열팽창 거동 연구 / 대한금속·재료학회지 41 (9) : 2 ~ 550
5. [학술지(정기간행물)] - T. Sakai / 1995 / Dynamic Recrystallization Microstructures under Hot Working Conditions / J. Mater. Process. Technol 53 (1) : 349 ~ 361
2. [학술지(정기간행물)] - H.W. Carpenter / 1976 / Alloy 903 Helps Space Shuttle Ply / Met. Prog 110 (3) : 25 ~ 29
3. [학술지(정기간행물)] - S. Wang / 1991 / Microstructure and Mechanical Properties of Fe-Ni-Co-based Superalloy after Longterm aging at 650oC / Acta Metall. Sinica 4 (3) : 194 ~ 198
4. [학술지(정기간행물)] - 이기안 / 2003 / Fe-Ni-Co 저열팽창성 합금의 고온 변형 특성 및 열간가공에 따른 열팽창 거동 연구 / 대한금속·재료학회지 41 (9) : 2 ~ 550
5. [학술지(정기간행물)] - T. Sakai / 1995 / Dynamic Recrystallization Microstructures under Hot Working Conditions / J. Mater. Process. Technol 53 (1) : 349 ~ 361
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UCI(KEPA) : I410-ECN-0101-2014-551-000230916