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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2002.7
- 수록면
- 1,317 - 1,323 (7page)
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This paper describes the comparison of calculated effective stress with experimental one in austenitic heat resistant steels,
STS31OJITB and STS31OS with and without a small amount of Nb and N. Based on a solute atoms diffusion model, contribution from soluble nitrogen to the high-temperature strength was numerically examined for austenitic heat-resisting Fe-Cr-Ni-N(STS31OJITB) and Fe-Cr-Ni (STS31OS) alloys. The solute atmosphere dragging stress of dislocation was calculated in optional dislocation velocity of STS31OJITB and STS310S at 650℃, 675℃ and 700℃. As a result of the numerical calculation, the solute atmosphere dragging stress of STS31OJlTB was about 50 times larger than that of STS310S. When the temperature became high, the maximum value of solute atmosphere dragging stress was small and the velocity of moving dislocation
was fast. From the relationship between the dislocation rate and the solute atmosphere dragging stress, the relation of both was proportional and the inclination is about 1 in the level with low velocity of moving dislocation. From above results, the mechanism of dislocation movement in STS31OJ1TB was the solute atmosphere dragging stress. The solute atmosphere dragging stress, which was calculated from the numerical calculation was close to the effect stress in stress relaxation tests.
STS31OJITB and STS31OS with and without a small amount of Nb and N. Based on a solute atoms diffusion model, contribution from soluble nitrogen to the high-temperature strength was numerically examined for austenitic heat-resisting Fe-Cr-Ni-N(STS31OJITB) and Fe-Cr-Ni (STS31OS) alloys. The solute atmosphere dragging stress of dislocation was calculated in optional dislocation velocity of STS31OJITB and STS310S at 650℃, 675℃ and 700℃. As a result of the numerical calculation, the solute atmosphere dragging stress of STS31OJlTB was about 50 times larger than that of STS310S. When the temperature became high, the maximum value of solute atmosphere dragging stress was small and the velocity of moving dislocation
was fast. From the relationship between the dislocation rate and the solute atmosphere dragging stress, the relation of both was proportional and the inclination is about 1 in the level with low velocity of moving dislocation. From above results, the mechanism of dislocation movement in STS31OJ1TB was the solute atmosphere dragging stress. The solute atmosphere dragging stress, which was calculated from the numerical calculation was close to the effect stress in stress relaxation tests.
목차
Abstract
1.서론
2.계산 방법
3.결과 및 고찰
4.결론
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UCI(KEPA) : I410-ECN-0101-2009-550-014036693