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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2024.8
- 수록면
- 2,158 - 2,168 (11page)
- DOI
- 10.1007/s12540-024-01641-9
이용수
초록· 키워드
오류제보하기
TC25G alloy was heat treated at 950 °C/3 h, AC + 580 °C/6 h, AC and the bimodal structure with primary α phase + β transitionstructure was obtained. The creep properties of the alloy were tested in 550–600 °C/150–250 MPa. The results showthat the precipitations of silicide and α2 phase is accompanied by the creep process. α2 phase plays a dispersion strengtheningrole in both the primary and steady-state creep stages. However, in the accelerated creep stage, the mechanism of α2phase and dislocation changes from cutting mechanism to bypassing mechanism, and the strengthening effect is weakened.
Silicide inhibits grain boundary slip mainly in the primary creep stage, and inhibits dislocation slip in the steady-state andaccelerated creep stages. At 550 °C, n = 1.6 and Q = 280–371 kJ/mol (150–250 MPa) indicate that the creep of the alloy is aself-diffusion process, and the creep deformation is mainly controlled by dislocation slip. At 570–600 °C, n = 3.2 indicatesthat the dislocation climb controls the creep deformation. Meanwhile, compared with Q = 274 kJ/mol at low stress (150 MPa),Q = 365 kJ/mol at the high stress (200–250 MPa) indicates that the second phase precipitation enhancement is enhanced.
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